Re: OT 350 engine help

Posted by Bob on February 26, 2006 at 18:55:48 from (64.21.249.40):

In Reply to: Re: OT 350 engine help posted by Can't even use my name on February 26, 2006 at 18:10:48:

They're hydraulic lifters. "Specs" from different sources vary between 3/4 and 1 turn tight, after the "zero lash" point.

NO feeler gauge is needed.

Consult a shop manual for the "two position" valve setting method.

You set the engine to #1 TDC at the end of it's compression stroke, and then set half the valves, and then turn it EXACTLY 1 turn, and then set the other 1/2.

(I'll just post the procedure.)

BE SURE the engine is set to #1 TDC, at the end of it's compression stroke, ready to begin it's firing stroke. BOTH valves on # 1 will be closed.

With the valve's lash set "loose", keep spinning the pushrod for the rockerarm you are setting, with your fingers, while slowly tightening down the adjustment nut. As lash is reduced to "zero", you will instantly notice increased resistance to spinning the pushrod. From this point, continue to tighten the rockerarm nut 3/4 or 1 turn, as you prefer, to pre-load the lifter.

Adjust the #1 exhaust valve
(closest to radiator, on drivers side)

Adjust the #1 intake valve
(second from the front, on drivers side)

Adjust the #3 exhaust valve
(forth from the front, on the drivers side)

Adjust the #5 intake valve
(sixth from the front, on the drivers side)

Adjust the #7 intake valve
(seventh from the front, on the drivers side)

Adjust the #2 intake valve
(second from the front, on the passenger side)

Adjust the #4 exhaust valve
(fourth from the front, on the passenger side)

Adjust the #8 exhaust valve
(very back valve on the passenger side)

Now rotate the engine exactly 360 degrees (1-turn) in the normal direction of rotation. The mark on the balancer should be back at the TDC mark. Keep in mind that this is not the TDC where #1 would be firing! It's where #6 would fire.

Adjust the #3 intake valve
(third from the front, on the drivers side)

Adjust the #5 exhaust valve
(fifth from the front, on the drivers side)

Adjust the #7 exhaust valve
(very back valve on the drivers side)

Adjust the #2 exhaust valve
(closest to the radiator, on the passengers side)

Adjust the #4 intake valve
(third from the front, on the passengers side)

Adjust the #6 exhaust valve
(fifth from the front, on the passengers side)

Adjust the #6 intake valve
(sixth from the front, on the passengers side)

Adjust the #8 intake valve
(seventh from the front, on the passengers side)

You are now done.

If this does not help, you may have a stuck lifter, that is refusing to bleed down enough so it's valve can close, or fuel system or electrical troubles.

Post back!

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