Allow me to pick a few of the brains out there.
Car is a 100M. Engine totally rebuilt during restoration a few years ago.
Not used much since, MAYBE 1000 mi.
Started off a few weekends ago and after a few miles I noticed the car
surging at hiways speeds. Pulled over and let it idle and it was making a
terrible
clattering noise. (I actually called the people I was going to meet and
canceled. Went to call AAA for a flatbed and the noise stopped and the car ran
great.) Proceeded with a 60 mile drive and the car was perfect.
During the day, every time I started up the clattering was there for a short
time. Oil pressure was 40psi at idle. Car ran great on the 60 mile trip home.
The next day when I tried to start it, it spun over very fast on the starter
and when it finally caught, it clunked along on one cylinder. After a few
min, of that a second cyl. came on, then a third and then the forth. During
that time the noise it was making was scary. Once all four were firing, the
motor was perfect,
Today, I did a compression check. Engine cold, throttles open. 0, 140, 0, 0.
Pulled the valve cover and found the problem. Valves nos. 1, 5, and 8 stuck
open. ( No wonder it clattered so badly) And it seems obvious that once things
warm up the valve giudes are expanding and letting the valves work again.
Question are:
What could cause this to happen?
Any suggestions as to how to correct it?
As always, thanks for any and all imput!
Bob
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