Patrick,
I had something similar happen to me. A tremendous loud clattering would come
and go. Fortunately I was only 10 mi from home.
In my case it was a dry rocker end - my guess is the oil passage got clogged.
When I took the rocker assy off all except one of the rockers had oil in the
end cups where the pushrod tubes seat.
I was looking for an excuse to substitute high lift rockers; installed those a
year or two ago and haven't had the problem since.
Before doing this, I took the pan off and looked up at the cam lobes, which
looked fine.
Maybe you could borrow a rocker assembly and try it out.
--
Steve Gerow
BN6 with 29D engine
|