Hello,
Okay it really sounds like something is not exactly right with the
timing chains. If they are all new and if the cam towers are shimmed
correctly it should not reattle on hot restart. Maybe the cam towers were
not shimmed enough?? Or maybe Dana is correct and the tensioner is bunged
up. My oil pump is shimmed (by the Po) and I do have more pressure at
idle than a standard U-20.
I don't want to cast dispersions on the p.o. but how can you be
absolutely sure he replaced everything?? Did he show you receits?? He may
win awards for the car but they don't check the chains do they?? Or make him
hot-restart the car??
Daniel 69 2000
SF CA
> Thanks to all the people that got back about my chains and things. I spoke
> to the previuos owner today, he assures me that the cam towers were shimmed
> and line bored during the re-build. He also said that all the chains guides
> and tensioners were brand new 10,000 miles ago. The car was restored in
> 95/96 and has only traveled to club meetings and things over the last 5
> years or so. The car has won plenty of awards for condition and
> presentation, so I do believe the guy when he tells me what has been done.
> So, what next. ?? Brad ( the last owner/restorer) supplied me with a brand
> new oil pump. This was to be his next step in fixing the problem, until the
> need to pay off his mortgage prompted him to sell the car.
>
> Do the U20 engines have a common problem with low oil pressure. Based on
> others experience, would this be a possible/probable cause.
>
> Symptoms are, cold starts - no rattle. When the engine reaches running temp,
> the chains rattle at 700 to about 1000 rpm and then go quiet above
> that........any ideas anyone??
>
> All the best, Brian.
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