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Lifters, push rods, and compression -- 390

This is a discussion on Lifters, push rods, and compression -- 390 within the Mechanical and Engine Tuning and Mods forums, part of the Tech Forums category; Hello all, Recently replaced the exhaust manifold gaskets on my '66 390. Had noisy lifters as well, so I decided ...

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  #1 (permalink)   IP: 98.82.124.67
Old 01-25-2011, 06:56 PM
 
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Lifters, push rods, and compression -- 390

Hello all,
Recently replaced the exhaust manifold gaskets on my '66 390. Had noisy lifters as well, so I decided to replace them. So far so good. Got things back together and it started up ok, but somewhat rough. Went back a couple days later to tune it up but it wouldn't start. Checked compression. Several cylinders were very low while others had no compression. Read an article mentioning new style lifters would result in pushrods being too long. I believe the valves are not seating 100% therby resulting in the lack of compression. I kinda thought the hydraulic float would absorb the difference. Anybody run into this kinda thing, and how did you resolve?

Thanks,
John
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  #2 (permalink)   IP: 99.17.216.169
Old 04-21-2011, 10:09 AM
 
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Went To Napa Auto And Got Stock Lifters And Rods And Had No Problems.1962.
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  #3 (permalink)   IP: 71.123.135.133
Old 04-22-2011, 12:29 PM
 
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Kapejo: I don't have the exact answer to your question yet. I suggest you check your valve clearance per the shop manual. That would involve collapsing the lifter and measuring valve stem to rocker clearance.
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