[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]
Re: 5000S Engine dead
A couple of months ago, my Avant lost a lot of power suddenly. This
eventually turned out to be the cam belt. It had jumped one notch. I
think this would also lead to loss of compression - (I didn't measure
it at the time).
I diagnosed the fault by observing the vacuum on the econometer - it
never went very low any more. When I attached a 10UKpound vacuum
tester to the engine - the dial indicated "valve timing retarded" (the
scale went from OK to late ignition to valve timing retarded). I
didn't really believe this, so I then checked the timing marks on the
cam and the flywheel, and they were out by one tooth! I reset the
belt, and the engine ran like a dream.
The problem was obviously due to a loose cam belt. I have tightened it
up (what a stupid adjustment, having to loosen the water pump and lose
all your antifreeze, just to tighten a belt) and now my water pump is
producing an alarming rattle at idle - has anyone come across this
type of failure before?
BTW, if my cam belt had jumped by more than one tooth, would the piston
have met the valves? The engine is a 2144cc 5cylinder non turbo (I
think the engine code is WC).
The same week that my cam belt jumped, exactly the same thing happened
to my friends Opel Kadett (Vauxhall Astra). He was told that it was
probably due to a stone getting between the belt and a toothed wheel.
Final question - how do you lock the engine without the special tool.
Can you wedge a screwdriver against the teeth on the flywheel?