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The Master Cylinder General Tips:
Index
I plan to store my car again this winter. I just bought my third
battery in four years.
Someone told me that I had "boiled" my battery dry.
My seat won't go all the way back anymore. Any idea why?
The front wheel bearings on my car seem loose to me.
I read your piece about the convertible top flying over the car
My radio reception is terrible
My car battery is dead
Baked, Hard Leather Seats
Tattered Carpets
Better Stereo
Legs too short to reach the dead pedal for Drivers Education
Boxster and Carrera Blown Engines
Post Restoration Insurance Coverage
Cure a brake vacuum bleeder that has a case of the bubbles
Replacing a hood emblem
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Q - I plan to store my car again this winter. I just bought my third
battery in four years. It is not even the cost of the battery that
bugs me, it is just a pain to get it out and then back in.
A - I store a number of cars every winter and face the same
issues. On my Porsche, I have two really slick items that you may
want. The first is a battery cut-off switch. The ones I use are made
by Hella. They are marine quality rated at 1,000 amps which is a lot
stronger than you need, but then again more is better, right?
The other thing I use is a battery maintainer, not to be confused
with a trickle charger. The difference is that a trickle charger
often just keeps on charging even when it shouldn't. This will ruin
an otherwise good battery if you forget to unplug it. The battery
maintainer on the other hand, charges, stops for a while, discharges
a little, then charges again. This keeps the battery "excercised" so
to speak and prevents overcharge.
MC |
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Q -
Someone told me that I had "boiled" my battery dry.
A - The electrolyte on a battery generally needs to be checked if it can be. Many people
think they have a "maintenance free" battery and experience has shown that this is usually NOT the
case. Over time, the electrolyte gets depleted and the battery may need to be topped up with
distilled water.
MC |
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Q -
My seat won't go all the way back anymore. Any idea why?
Brian
A - If you look under and next to the seat, you might find some spare change. A quarter makes
an effective wedge that jams the seat track. Sometimes you can dig the coin(s) out with a
pair of long nose pliers, occasionally you have to remove the seat. Don’t force it!
MC
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Q -
The front wheel bearings on my car seem loose to me. Can I just tighten them or should I
take them apart to get a better look at them.
A - If you can tell that they are loose, they probably are. On Porsche, the bearings
generally run tighter than other cars since Porsche hubs are made of aluminum (which tends
to expand when hot). If they are loose, it is possible that they are worn but to simply adjust
them never hurts. The bearings are quite heavy duty for the size of the car and last a long
time. I recommend inspection of the bearings during a complete front brake service while the
calipers and rotors are off the car. Usually bearings give you plenty of advance warning
(growling) before they fail.
MC |
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Q -
I read your piece about the convertible top flying over the car in the P4 and I wanted
you to know about a letter I got from Porsche. It turns out there is a recall on the convertible
top lock motors that even provides reimbursement if the problem has already been fixed. How about
that?
A - Thanks for the update. I am sure that anyone who has not yet been notified will call the
dealer to get it handled. When I asked some of my buddies, if they had received the notice,
they had NOT.
For those who never get anything from Porsche, let me clue you in. If you have not registered
your ownership with Porsche (that little card in the owners manual that NO ONE fills out) you
will not get notified of recalls or service campaigns. Only the original owner gets notified
unless you send in the card.
Do the right thing, tell the manufacturer that you own one of their products. You will not be
bombarded with junk mail. You WILL receive important info about your vehicle if they need to
contact you. As a sidebar to this, if you are in doubt, any dealer will cheerfully check for
open recalls or campaigns if you simply present yourself or your VIN number to them and ask.
Try it, it's free! (They get paid by the factory.)
MC |
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Q -
My radio reception is terrible. It was so bad that I replaced the stereo but
it didn’t help. Every time I take it in for service, it works fine but whenever I get out
of the city I can’t pick anything up. The antenna is built into the windshield and it was
cracked so I replaced it. I hoped that this would help but still nothing. The shop even
tried another stereo but it made no difference. The antenna cable looks fine.
A - You must live in the boonies. But seriously, check the antenna cable resistance
and I bet you will find the problem. My guess is that the center lead has broken by tugging
on the cable rather than the plug. Besides, it’s the only thing left!
MC
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Q - I just went out to start my car and the battery is dead. If I can start it with a jump, is it OK to let the car run for a while and charge up? - Justin
A - It is a widely held belief that the car’s charging system is for charging the battery. Oddly, the folks who designed, built and supplied your alternator do not think so. I know it doesn’t make sense but Bosch warns against trying to charge a dead battery with the car’s charging system.
The alternator’s mission is to replenish the electricity lost during starting and maintain the charge of the battery by powering all the vehicle accessories. A dead battery can send the alternator into thermal overload by delivering too much electricity. Bosch clearly states this on the installation instructions provided with every alternator. It certainly doesn’t seem intuitive does it?
Alternators are designed to produce their rated load for relatively short periods and then taper off. Alternators that produce maximum output continuously are used on commercial vehicles such as police cars, ambulances, etc.
If you have the time to wait, your best bet is to charge the battery at a low rate to charge it up fully. I use a 2 amp manual charger for the first 24 hours then an automatic charger at the 10 to15 amp setting for another 24 hours. To fully charge a stone dead battery may take a couple days and it is best not to rush the process. If you are going to try this however, please note the following paragraph.
If you notice the odor of rotten eggs or see liquid bubbling out of the battery, unplug the charger at the wall socket and sprinkle a little baking soda on that bubbling liquid (which is probably acid). Leaking battery acid will damage the trunk of your Porsche and that nasty odor indicates the presence of an explosive gas (hydrogen). A spark can ignite the hydrogen which is why it is wise not to simply unclip the battery clamps.
If you are in a hurry and you can’t wait to drive your car, connect the jumper cables and let the running car send power to the dead battery for about 15 minutes before you even try to start your Porsche. Once your car is running, rather than letting it idle, drive the car to charge it up. At higher rpm’s, the alternator runs cooler as it charges.
When you park the car that night, put the battery charger on at the 10 to 15 amp automatic setting. Usually one overnight charge will bring it back up to snuff if the battery is healthy. Please note: If you have a charger with both manual and automatic modes, I suggest that you only use the automatic setting. Keeping the battery in a proper state of charge will save your alternator and your battery tray. - MC
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Q
- The leather in my car is very hard from many years in the Florida heat. The seams are pulling apart. I tried some leather creams and treatments but the leather is still hard and the little perforated holes in the seat cushions got clogged with the treatment. I paid my son and his friend $10.00 just to clean all those little holes with toothpicks. Got any ideas?
Bill
A - For this cure, you will need to practice patience. Remember it took years to dry out so don’t expect it to soften up overnight. I have had old leather come back to life with repetitive coats of “Neatsfoot oil”. You can buy it at the hardware store but I get mine at the local saddlery. (Horse people definitely know leather.)
It takes a while to soak in so plan to do it when you know that you won’t be using the car for a day or so. Paint it on with a natural bristle paint brush. You will notice how it soaks into the leather at different rates. Expect to recoat the neediest areas and wipe the excess off the places where it does not soak in. In some cases, you might discover that it does not soak in at. It is possible that your leather seats may actually be part vinyl. Don’t worry, it won’t hurt vinyl.
After a few applications you will begin to notice the difference and in a few months, your hard seats will soften up again. Incidentally, if you want to apply a more intensive heavier coat, you can cover the seats with plastic for a day or so. This also allows you to drive the car if you can’t wait for it to soak in.
MC
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Q - I own one of the “entry level Porsches”; a late 80’s Carrera. Generally the carpet is in pretty good shape but some of it is a little tattered (near the clutch pedal), it is getting a bit droopy (under the pedals), the backing has gotten a little rotted (on the floor), and it’s a little faded (map pockets and package shelf). Of course I could buy a new carpet kit, but I would like to keep it as original as possible and besides, I like playing with it. Do you know any alternative that is good AND cheap?
A - Charlie, that “good and cheap” is a favorite oxymoron of mine. I prefer “above average” and “resourceful”. Good and cheap usually doesn’t work out too well, but I will give this a try. Nothing ventured, nothing gained. The fading is easy. At the local auto parts store, there is a product called “Carpet and Vinyl dye made by Duplicolor. I have used it to restore rear hatch carpet on 924 and 944, the package shelf carpet on 911 and it works fantastic. I don’t sell it but I could. It works that well. I did my door pockets with it and it took longer to mask off the doors than it did to apply the product. In two hours, I was “back to black”.
Since this is the Motor City, there are many sources that sell automotive carpet. I found a source that one would never suspect could match the black 80’s Porsche carpet; Seat Cover King in Pontiac. When I got a sample the comment was made “it’s not an exact match, I’m not sure you will like it”. Fact is, it is NOT an exact match, it is actually better! The pile is thicker and it has no backing (just like the original). For the compound curves inside a Carrera, it is excellent and inexpensive. Far better than “good and cheap” For the backing, I have seen rubber glued to the back of the carpet to help keep it flat. It looks pretty tacky and makes the carpet sit higher too. What I tried was poly urethane glue (A.K.A. Gorilla glue) from the local hardware store. I cleaned the carpet very well and dried it with cement blocks on top to flatten it. Once it was mostly dry, I created a waffle pattern on the back with Gorilla glue. I covered it with wax paper and again used cement blocks to squish it thoroughly into the carpet. When it was dry, the piece was nice and stiff and sits proudly where it belongs, looking fresh and beautiful. Of course, there are those who might say: “why bother, just buy the doggone kit”. Well I might someday, but this time I can proudly say “I did it”.
MC |
Q - What can I do to get better sound out of the stereo on my 89 Turbo Cabriolet? I will not cut or modify the car so if you suggest this, FORGET ABOUT IT!,
Marc
A - Marc,
I respect that, I would not endorse cutting either but there are options. Although there are many excellent products, I prefer Blaupunkt. Since Blaupunkt is a subsidiary of Bosch and Bosch is the engineering God of German electricity, it is a natural choice. Blaupunkt was the original manufacturer of the sound system in your Cab. Blaupunkt systems can be fitted that will leave the wiring intact. Regardless, do not cut the harness! That would be a sin. Now since, you can keep the original harness, relax. Now how about speakers?
When you cue “Drive my car” and John starts his lead riff it has to feel solid. When Ringo and Paul kick in, you want your solar plexus to thump as you tap the steering wheel. At the first chorus when the piano run anchors the chorus “Baby you can drive my car” Paul’s bass line has to be crisp and solid, not muddy and distorted.
Speaker location and size are the limiting factors. And as everyone knows, size DOES matter. So what can you do? Simple. Hide a subwoofer and upgrade the door and rear quarter panel speakers to the best components possible. Blaupunkt has an 8 inch self powered 140 watt subwoofer that fits neatly under the passenger seat. It is only 80mm thick and it works! On some cars, the seat needs to be raised an inch but no one will notice.
No, you car won’t thump like that jacked up Camaro at the stop light. And you won’t annoy your neighbors. But your spouse might wonder why you sit in the car until the song is over. It sounds that good.
MC |
Q - You could say that I am vertically challenged but I can’t grow longer legs so I need your help. When I am at driver’s education, my left leg barely reaches the dead pedal and as a result, I get a cramp in it. Have you heard of a good solution short of lifts?
A - Joe this may absolutely disgust you but I suggest a 2 X 4. Yes, I said a 2 X 4 but not JUST a 2 X 4, but a well concealed, elegant spacer that resembles a 2 X 4 (which no one will recognize as a 2 X 4).
Since you just need space and carving up your interior is not an option, you can fashion a well fabricated spacer out of wood that works just fine. The trick is locating the mounting bolts correctly and securing it well. Caution: The penalty for doing a half baked job is VERY severe! So if you lack woodworking and fabrication skills, don’t try it. However, once the mock up of your new dead pedal is complete, and utter integrity is assured, your local trim shop can provide a type of carpet called “trunk mat” that is very thin and can be glued securely to the 2 X 4. Performance Products does not sell these but if you are creative, it can be done quite effectively for about $20.00 or less.
MC
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Q -
My 2003 Boxster S just dumped a few gallons of oil as it was
driving it and the dealer tells me that the engine is ruined. It
is under warranty but naturally, my summer of fun is over. Down
the road, is this likely to happen again?Q - My 2005 Carrera just lost all its oil and the shop tells me that the engine needs to be replaced. Prior to this, two main engine seals were replaced and even though the dealer is replacing the engine under warranty, I want to know if there is anything I could have done to cause or prevent this.
Q - My 2001 Boxster died on the freeway and I had it towed to the dealer where I was told that the engine needs to be replaced. I have about 90,000 miles on it and it is not under warranty. They estimated about $16,000 to replace the engine. I have always had the oil changed and I use synthetic oil. What the heck! I am really upset.
A - These engines have a defect that Porsche is aware of and they are very gracious to clients with vehicles under warranty. When the warranty is up however, you can expect a hassle. You need to keep meticulous records of oil changes and services performed. If you lose them or miss an interval, heaven help you because Porsche won’t. What the future holds for those who were shown no love by the company no one knows but certainly a quality oriented company like Porsche is well aware of the problem and very sensitive to the negative feedback that comes from it.
Don’t beat yourselves up it’s not your fault. My ex brother-in-law had a total failure at 11,000 miles and although it could have been HIS fault, Porsche still bought him a new engine. As far as the replacement engines go, you can rest assured that the problem has been remedied. After all, rumor has it that the warranty department pitched a tent in the hallway outside engineering and has refused to leave until they can get some rest. And for all those dealer techs who got tired of fixing squeaks and rattles, they now have job security that other folks can only envy.
MC |
Q - I just spent
a lot of money restoring my car and I was wondering about my insurance coverage since I have now spent three times what any other car like mine is selling for. What do you suggest?
A - Many of your fellow hobbyists are in the same boat (or tub, if that’s your flavor). The first thing I recommend is forwarding copies of your receipts to your insurance agent to put him on notice of your expenses. I prefer to fax them or email since this stamps them with a time and date for reference. Next you need to ask if your present carrier offers coverage for your project. Many don’t offer the coverage that I prefer which is “agreed value”. Your receipts, an appraisal, and pictures of the car bolster your valuation if you experience a loss. Even if your car is not done, it should still carry agreed value insurance.
Many companies offer “stated value” coverage. I have found this useful to at least let the adjuster know that my car was not just a (in my case) garden variety Rabbit. When my car was “totaled” (their opinion) I was paid in full for the needed repairs and allowed to keep the car. I fixed it and it still wins “best of show” awards 25 years later. Beauty is in the eyes of the motorhead. I don’t recommend stated value coverage since the adjuster will want the value proven to him/her. If you suffer the trauma of a loss, the last thing you want to do is debate the wisdom how you spent your money to a bean counter.
“Actual cash value” coverage is what the majority of policies contain. For a collectible car, this is worthless unless you like arguing with an adjuster about why your car is special. For your daily driver, it’s no big deal unless you have tricked it out.
These topics are expanded on in an excellent article about insurance written by Dennis Denyer a few years ago. Dennis kindly agreed to freshen it up for a future P4 so stay tuned for more.
MC
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Q - I decided to flush my brakes so I bought one of those vacuum bleeders. When I hook it up to the bleeder valves and begin to suck the fluid out of the calipers, I get air bubbles continuously. I know that the goal is to get all the air out of the system so I am a bit frustrated. What am I missing?
A - I take a unique approach to flushing the brakes so I will let you in on some of my “trade secrets”. To keep air bubbles from the fluid stream, remove the bleeder valves altogether, “chase” the threads to remove corrosion, and wrap Teflon tape around the threads then reinstall them. Not only does this keep bubbles at bay, it also prevents the possibility of corrosion seizure of the valves.
The other processes that I employ are pressure bleeding and foot bleeding. When I flush the brakes, I combine pressure bleeding, vacuum bleeding and foot bleeding in an approach the gets as much of the old fluid out of the system as possible. First I suck the fluid out of the reservoir with the vacuum bleeder and see what is in the bottom of the reservoir. If it is full of black gook, remove it and clean it first with a strong detergent then with CLR (calcium, lime, rust remover). If you can’t get it clean, replace it. Once it is clean, I fill it with fresh fluid and connect a pressure bleeder that keeps about 15 pounds of pressurized brake fluid in the system.
At this point, a few cautions are in order. Brake fluid is corrosive and removes paint. If you plan doing a brake flush, protect your fenders and trunk against spillage and if you do spill any fluid, clean it up with soapy water immediately. Wear eye protection! And finally, if you have a tiny little hose connected to the top of the brake fluid reservoir, clamp it shut. It is the vent hose and if you leave it open, all the fresh fluid that you are pumping into the reservoir will end up on the floor!
Let’s say that you have the bleeders clean, taped and ready. You have the pressure bleeder hooked up and you are ready to begin. Connect the vacuum bleeder up to the valve, open the valve then have your assistant slowly push the brake pedal down then gradually release it. This flushes the master cylinder much more effectively than simply pressure or vacuum bleeding. You will be surprised at the color of the fluid that is expelled from the master cylinder. You will also be surprised at how quickly the flush itself is accomplished once you get through all the prep work.
Final cautions: Relieve the air pressure on the pressure bleeder and shut the valve before you disconnect it from the master cylinder or you will make a big mess. Anticipate spillage when disconnecting the bleeder and don’t forget to install the bleeder caps. Clean the mess off the calipers, tires and wheels and if you have any questions contact me.
MC
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Q - I just replaced my hood emblem and one of my ham-fisted buddies pushed on it to shut the hood and squashed it…just like the one I took off! The emblem swap started badly when I dropped one of the nuts inside the trunk and could not get it out. Then getting the rubber gasket in place was tough and as I tried to secure the emblem, it kept slipping under the emblem. It looked so easy.
A - Frustrated,
I had the same experience with my own car except the person who squashed it was no friend of mine. The emblem seems to be such a logical place to push the hood shut. After all, who wants a hand print on the paint!
A few tricks I have learned are to first make sure the pins on the emblem are straight enough that they will fit into the holes in the hood. If they are not (and they often aren’t) you can gingerly straighten them while applying pressure to the face of the emblem (so you don’t distort it and break the cloisonné)
Next I mix up a little epoxy to fill the void on back of the emblem so when it gets pushed on (and it will) it will not squash. After the epoxy dries, I warm the gasket up in the micro wave in a cup of water until it is very soft and pliable then stretch it over the emblem. As far as those pesky nuts, I use a nut driver with a small glob of butyl tape (bubble gum would work) to stick the nut to the driver while I am fishing it up into the hole. It works like a charm.
MC
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