New Lifter Install Procedure Help
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New User
Joined: Jul 2016
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New Lifter Install Procedure Help
Hey All,
I've recently pulled apart my 390 due to a ticking noise. Sounded like a lifter, valve or rocker tick to me. I have a few questions I hope someone can answer in regards to replacing them or fixing the noise. So far, the rocker arm assembly, push rods and valve springs all look good.
First off, do I need to take the lifters to a machine shop to have the hydraulic system tested? The bottoms of the lifters look to be in great condition, no abnormal wear.
Secondly, if one of the lifters is bad, should I replace them all? Or just the bad one?
Thirdly, if so, what are the procedures to installing new lifters? Can I just drop them in right out of the package and bolt it back together?
Thanks for helping me keep the old beast on the road.
Cheers
I've recently pulled apart my 390 due to a ticking noise. Sounded like a lifter, valve or rocker tick to me. I have a few questions I hope someone can answer in regards to replacing them or fixing the noise. So far, the rocker arm assembly, push rods and valve springs all look good.
First off, do I need to take the lifters to a machine shop to have the hydraulic system tested? The bottoms of the lifters look to be in great condition, no abnormal wear.
Secondly, if one of the lifters is bad, should I replace them all? Or just the bad one?
Thirdly, if so, what are the procedures to installing new lifters? Can I just drop them in right out of the package and bolt it back together?
Thanks for helping me keep the old beast on the road.
Cheers
Hotshot
Joined: Jul 2005
Posts: 13,834
Likes: 26
From: Middle Tn.
Question #3. I have always soaked new lifters overnight in oil prior to installing. Saves them having to pump up. You also should go thru the same break in procedure, my opinion, as when installing a new cam. 2,00 rpm for ap. 20 minutes. Have you checked the heads for a sunken valve? If the heads don’t have hardened exhaust valve seats, nows the time to do it. Unleaded fuel doesn’t cushion the seats.
Cargo Master
Joined: Dec 2015
Posts: 2,549
Likes: 329
From: Harned, Ky
First you should have identified which cylinder or lifter was ticking in order to replace just the one or two lifters.
There is no machine shop procedure to test the hydraulic capabilities of a lifter that I know of.
If you removed all of the lifters and didn't keep them in order as to what hole they came out of you'll need to replace them all. Putting pre used lifters back in a engine in the wrong location can and most times will destroy the cam and lifters.
Proper cam & lifter lube and break in procedures should be followed any time the lifters are replaced.
There is no machine shop procedure to test the hydraulic capabilities of a lifter that I know of.
If you removed all of the lifters and didn't keep them in order as to what hole they came out of you'll need to replace them all. Putting pre used lifters back in a engine in the wrong location can and most times will destroy the cam and lifters.
Proper cam & lifter lube and break in procedures should be followed any time the lifters are replaced.
Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
And before installing new lifters, inspect the bottoms to verify they're all machined correctly. The bottoms are convex, not flat. And they should all have the same machining patterns. If you're in doubt as to any one lifter, replace it with one that matches the rest. Bad lifters were a major cause of cam failures in the recent past.
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