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Car Forum / Porsche / Porshe 944 / February 2005944 S2 vibration above 3000 rpm
Hello, I purchased a 1991 944 S2 recently. During acceleration above 3000 rpm, I can feel obvious vibration from the car. The problem seem to exist in every gear over 3000 rpm. A mechanic here in Taiwan told me that it's becase of worn out CV boots on the center main axle? Does this sound like what's happening? Thanks for any inputs in advance. Eric if the vibration is RPM dependent and not speed dependent as you say, it is NOT the CV boot or anything in the transmission. I'd start by checking the balance shaft belt just to be safe > Hello, > [quoted text clipped - 5 lines] > > Eric Not CV. Your car has the balance shaft belt off a notch. I'm with Noble. If it's an RPM dependent problem, it's very possible that a balance shaft belt is broken. This has happened to my baby twice. > Hello, > [quoted text clipped - 5 lines] > > Eric > I'm with Noble. If it's an RPM dependent problem, it's very possible that a > balance shaft belt is broken. This has happened to my baby twice. Should the car be towed or is it still drivable at this stage? If the balance shaft belt is broken you would know about it at less than 3000rpm. To be on the safe side I would not drive the car. If there is a broken belt it could get tangled up with the cam belt, break it and cause damage to the valves as the pistons run into them. Tow the thing. My mechanic found mine when replacing my water pump. When I got my car, I thought the roughness was typical of a 4 cyl. After he replaced the time and balance shaft belts it was smooth as butter. I guess what I'm getting at is that I drove mine for months not knowing it had a problem. However, I may have just been lucky. >> I'm with Noble. If it's an RPM dependent problem, it's very possible >> that a >> balance shaft belt is broken. This has happened to my baby twice. > > Should the car be towed or is it still drivable at this stage? it is an easy matter to check this. remove the front cover (timing belt cover) and check for anything obvious. also does the vibration go when the clutch is engaged, iof so its not engine, its further down the drive train. does the gearshift shudder as well, if so this is indicitive if the belts not being correctly tensioned ________________________________________________ Webpage http://www.Playback.demon.co.uk E-mail: Adrian AT Playback DOT demon.co.uk SPAM, What SPAM ? Anti-SPAM software in use "SPAM-BUSTER" "Do not worry about tomorrow for tomorrow will worry about itself. Each day has enough trouble of its own." ---------------------------------------------------------------------------- ------------ Currently NotJustPorsche is not subscribing any new members SHOCK ME, SAY SOMETHING SMART > My mechanic found mine when replacing my water pump. When I got my car, I > thought the roughness was typical of a 4 cyl. After he replaced the time [quoted text clipped - 7 lines] > > > > Should the car be towed or is it still drivable at this stage? |
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