Question about Cars & Trucks
I'm replacing head gaskets on a 350 chevy. I need to tighten the rocker arms. It has hydralic lifters. the book says take the lash out of rods and go one more turn. Thats too tight from past experience. What do the pros do with out starting motor with the lifter covers off?
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Posted on Jan 02, 2017
this is the way i adjust tappets remove all spark plugs
draw this on a paper
u start with no1 get the valves rocking which means turn engine over by hand til no 1 rockers one rocker is going up and the is going down u may have to turn the engine back and forth slowly
to see it . once u have no 1 rocking u can adjust no 6 valves adjust them with a little clearance so the push rod still spins freely
next look at chart
1 rocking adjust 6
5 rocking adjust 2
3 rocking adjust 4
6 rocking adjust 1
2 rocking adjust 5
4 rocking adjust 3
once u have made these adjustments recheck firing order 153624
try and restart engine if it starts the turn all rocker ajuster a further 1/4 of a turn and your done u may have too wait a bit of time for the liffters to bleed down after u do final adjustment if it dont start
hope it helps please leave rating and if u need more help let me know
Posted on Dec 19, 2008
SOURCE: LIfter Noise.
The automatic valve adjustor not allow you to set the valve gap.If it is making bad noise then it needs replacement.When changing valve lifters, it is recommended that the lifters are
allowed to "settle/seat" for a minimum of 30 minutes to allow excess
oil to drain. If this recommendation is not followed, some valves will
make contact with the piston, resulting in the valve to break at the
collet groove. It is also ideal if the engine is allowed to rest over
night before starting the engine for the first time. If possible, the
engine should be hand cranked or turned by hand the first time.
Posted on Jul 23, 2009
SOURCE: Rocker arm failure
Did the timing belt break at one time? Aside from the obvious of it sounding like your son did what mine did and tried to race the vehicle beyond it's abilities if the timing belt broken at one time it may have damaged the valves. If the valve impacts the cyclinder it is possible that it can damage the rocker and cam. When you pull the head off this time have the head re-worked and valves replaced. This should solve the problem.
Posted on Sep 12, 2009
Okay. Turn the engine untill you have the crank mark lined up with the 0 on the pointer. At that point, look at the valves on #1 cylinder. They should both be closed, or in the "up" position. If they aren't, you'll have to turn it one revolution, to get to compression stroke. Now, you're ready to put the distributor in. Take the top off the cap, and position it in the hole, so that the rotor lines up with #1 on the distributor cap. If it's a newer one, take a close look inside at where #1 actually is because the newer ones are off set a little. Now, tighten the cap on, and hook up the plug wires, one at a time in the proper order and rotation. When you try to start it, it should run where it is, but you may have to turn the distributor slightly one direction or the other to make it start. Try your best to keep it running for 20 minutes or so the first time so your gaskets will set. ( not always an easy task when the valves aren't adjusted, and antifreeze can still vapour lock on you) If you need to know more, let me know.
Posted on Nov 13, 2009
Testimonial: "Thank you , but still hoping i had it at tdc to start with when i set the rocker arms but checked comp good on all but #1 and #3 "
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