Ok I posted awhile back about this engine having a miss.Found out it
was a broken valve spring.Replaced the valve spring put the adjuster
back in place installed the cam follower and had no compression.Took
the cam follower off and got a reading of 150.It looks like the valve
lash adjuster is keeping the valve open.Any ideas on how these things
adjust?Everywhere I look it says they are hydraulic and self adjust.
If any part of the valve tappet assembly needs replacing, replace the
entire valve tappet. Internal tolerances for the valve tappets are very
critical. Mixing components from different valve tappets may upset these
tolerances, resulting in improper valve tappet operation and possible
Keep valve tappets in proper sequence so that they can be installed in
their original position. Inspect and test each valve tappet separately
to avoid a mixup. If a valve tappet is worn, replace all valve tappets
and rocker arms.
Thoroughly clean all the parts in clean solvent and wipe them with a
clean, lint-free cloth.
Inspect the parts and discard the entire valve tappet if any part shows
pitting, scoring or excessive wear. Replace the entire valve tappet if
the plunger is not free in the body. The plunger should drop to the
bottom of the body by its own weight when assembled dry.
Assemble the valve tappet and check for freeness of operation by
pressing down on the plunger. The valve tappets can also be checked with
a hydraulic tester to test the leakdown rate. Follow the instructions of
the test unit manufacturer or the procedure under Camshaft Lobe Lift,
Hydraulic Valve Tappet and Leakdown Testing.
Valve, Ball Tip--Tappet Wear
The valve tappet tip is ball-shaped with an oil hole in the top. Light
radial scuffing is acceptable. Replace if medium-to-heavy scuffing,
pitting, galling or metal transfer is found. Also check parent rocker
arm in ball socket area for similar conditions.
If the adjuster is not collapsing properly after a couple of
minutes after installation, it will probably nee to be
replaced. They have a leakdown rate designed into them. If
they do not collapse, they are eith gummed or stuck
extended. which doesn't terribly surprise me after the
follower has become dislodged. They usually go right back
in without a problem. This may be a result of the broken
valve spring allowing it to overextend at higher RPM. Your
best bet is to simply replace the faulty one.
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