b569rr
Well-Known Member
Took the road runner out yesterday. I got on it probably 5 different times. Taking it 6000 rpm. I my last WOT, I stabbed it, tires broke loose and it hit 6500. Looks like my rev limiter did not kick in but I shifted at 6500 at the track last year for about 10 runs. Well when I come to a stop I hear a hard tick and my rpm, usually 1100 now sits at 1400 at idle. Strange in rpm.
I look at my oil pressure and it's solid at 38 at idle and hot. I coasted it home and figured I'd pull the valve covers and look for a bent pushrod. When I pulled he covers I noticed the intake rocker on cylinder 4 was very sloppy( like 1/8" lash) I run 3/4 turn past zero normally. I pulled the Hughes rockers and pushrods and they all look great. So I figure I kissed a valve and it's hanging open, but an intake valve? I put a straight edge on the valve stems and they are all at the same height.
I tried pushing in the lifters this morning and they are still all solid but notice that the bad lifter has the pushrod sitting a little lower than the others on the base circle.
I know what it is but dammit I don't want to pull the crossram, and the heads just to change out a lifter. I don't think the valley cover with removable window will fit under a cross ram.
so any of you lose a lifter? I'm going to leak check the cylinders before I pull it apart also.
Tom
