With the summer motoring season fast approaching, I thought I’d put pen to paper in order to highlight three of the numerous less obvious problems, which could see you stranded at the roadside.
In each case the problem lead to a mechanical breakdown, each has been seen at our workshop within the last six months & importantly each was entirely preventable.
Before disappearing into the sunset this year, why not take half an hour to check over these areas – You never know what you might find!
Fuel tank feed line:
In at number one, this short piece of flexible fuel hose is a definite potential show stopper. The hose connects the fuel tank to the hard fuel line which runs the length of the car.
Check for chaffing and signs of perishing. If the hose on your car looks to be original, it will be brittle and liable to snap if disturbed. Exactly what happened to this 1968 coupe after its owner began to smell fuel in the cabin: (See pics)
The same goes for the flexible hose at the rear of the car, where the hard fuel line ends and another flexi hose is used to run fuel up to the engine bay.
Gear linkage UJ:
Whilst a sloppy gear change can be limited to being an inconvenience, if the plastic bushes in the rear UJ deteriorate enough, it can also leave you stranded.
The original material used by Porsche becomes soft and brittle over time, turning a dark yellow colour in the process. The bushes disintegrate and can completely fall out, at which point you can no longer select some or all gears.
Take two minutes to remove the rear transmission tunnel inspection panel on your car, and check the condition of your UJ bushes. If they require replacement new bushes need pressing into place, and don’t forget the locking wire afterwards!
We recently received a ’67 coupe on the back of a recovery truck, with what was described as a suspect clutch failure – This was the fault (see pic)
Throttle slider rod:
Lurking in the dark and oily under belly of your 912 is this throttle actuating rod. Its job is to translate the throttle movement from the gearbox mounted bell crank, to the linkage on the rear of the fan housing.
If the throttle linkage is incorrectly adjusted and/or not lubricated, the tip of the rod wears away and will eventually snap. (see pic)
The slider section of the rod should be checked for wear & lubricated. If the rod is excessively tight with no free play, then it may need removing and lengthening.
That’s all for now, stay tuned for more of the above to follow soon!
(Max Levell runs Revival Cars)
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DISCLAIMER: Any Technical Articles should be followed only by competant individuals, please consult a qualified Porsche engineer should you have any doubts about any aspect of 912 ownership