Amc 304 Valve Adjustment at Zelma Harvey blog

Amc 304 Valve Adjustment. The rocker fulcrums need to be replaced on many amc v8 engines at 60k miles. Maybe the adjustment just backed off somehow until it was loose. The amc 304 uses a cast iron block and heads with over head valves and hydraulic lifters. There is no valve adjustment. Yeah, sounds like lifter tick to me. Use a feeler gauge, set to the correct valve lash, and place it between the tip of the valve stem and rocker arm. How do you recommend adjusting past the shouldered stop in the stock valve train? Amc 258 i6 / 4.2l 's as well as amc v8's. As was pointed out, the pivots are torqued down to spec. This was a factory maintenance interval. The only way to “adjust” lifter preload is with the correct length pushrod or by grinding off the valve stem tip to establish the correct valve stem height and plunger position in. Try running the motor with the valve covers off and watch for which rocker is not staying tight. Is it possible that the lifter is just out of adjustment?

another PCV thread AMC 304 Jeep Enthusiast Forums
from www.jeepforum.com

Use a feeler gauge, set to the correct valve lash, and place it between the tip of the valve stem and rocker arm. This was a factory maintenance interval. The amc 304 uses a cast iron block and heads with over head valves and hydraulic lifters. The rocker fulcrums need to be replaced on many amc v8 engines at 60k miles. Yeah, sounds like lifter tick to me. Try running the motor with the valve covers off and watch for which rocker is not staying tight. Is it possible that the lifter is just out of adjustment? The only way to “adjust” lifter preload is with the correct length pushrod or by grinding off the valve stem tip to establish the correct valve stem height and plunger position in. There is no valve adjustment. How do you recommend adjusting past the shouldered stop in the stock valve train?

another PCV thread AMC 304 Jeep Enthusiast Forums

Amc 304 Valve Adjustment Maybe the adjustment just backed off somehow until it was loose. This was a factory maintenance interval. Amc 258 i6 / 4.2l 's as well as amc v8's. The amc 304 uses a cast iron block and heads with over head valves and hydraulic lifters. Use a feeler gauge, set to the correct valve lash, and place it between the tip of the valve stem and rocker arm. As was pointed out, the pivots are torqued down to spec. There is no valve adjustment. The only way to “adjust” lifter preload is with the correct length pushrod or by grinding off the valve stem tip to establish the correct valve stem height and plunger position in. Try running the motor with the valve covers off and watch for which rocker is not staying tight. How do you recommend adjusting past the shouldered stop in the stock valve train? The rocker fulcrums need to be replaced on many amc v8 engines at 60k miles. Is it possible that the lifter is just out of adjustment? Yeah, sounds like lifter tick to me. Maybe the adjustment just backed off somehow until it was loose.

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