collapsed lifters, temp solution query

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candymancan
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Re: collapsed lifters, temp solution query

Postby candymancan » Mon Oct 08, 2018 7:17 am

How do you tell if your lifters are collapsed just curious ?
2013 SS camaro, cammed, and modded too much to say 500 RWHP/650 crank 30k
1998 Jeep Grand Cherokee 5.9L Limited 191k
1998 Jeep Grand Cherokee 4.0 I6 laredo 256k
1990 Jeep Grand Wagoneer 126k

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tgreese
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Re: collapsed lifters, temp solution query

Postby tgreese » Mon Oct 08, 2018 8:00 am

Clatter, I'd presume.
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fulsizjeep
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Re: collapsed lifters, temp solution query

Postby fulsizjeep » Mon Oct 08, 2018 8:04 am

The most obvious symptom of a faulty hydraulic lifter is the clatter in the engine. A faulty lifter will usually result in the rocker arm, rocker arm bridge, valve tip and push rod also going bad if left unattended.
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letank
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Re: collapsed lifters, temp solution query

Postby letank » Tue Oct 09, 2018 2:29 pm

candymancan wrote:How do you tell if your lifters are collapsed just curious ?


as said above... but for my specific case, no noises, only an engine vibration at off idle with shaking that has disappeared after the ATF treatment... but now, I have a low tap consistant w collapsed lifter(s)

the manifold vacuum is 20", w a slight flutter of 0.5"... timing is off, too much caked oil, finally spotted around 10... Need to reroute vacuum for manifold vacuum... the list is long...
cleaning vents before first rains...
Michel
74 wag (349 Kmiles... parked, next step is a rust free body)
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See Engine bits and Fuel and brake lines, and Body work

candymancan
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Re: collapsed lifters, temp solution query

Postby candymancan » Wed Oct 10, 2018 7:24 pm

Reason i ask is my 360 makes horrible clatter or clanking when cold started but only if i drive it.. If it starts and idles its not there.. If i drive it it chatters badly for the first 100 feet then quiets up.

Thr knocking is still there very very slightly in idle when i drive wherever but yea.

Oil pressure is 40 cold idle. 20 hot idle.. and 60 driving hot... I took the crsbk bearing off at least 3 of em and they were all fine.. But ive put over 20k on it like this and it hasnt gotten worse or better.

I just csnt figure out why it does this... Everyone who hears the engine in oerson think it sounds great.. but they dont hear the cold start drive imediately noise.. If i cold start it and let it idle of maybe 5 min then drive off the noise isnt there..

So i dunno wtf it is.. sorry to ask this in your thread but ige been trying to figure this out for 2 years since i bought it
2013 SS camaro, cammed, and modded too much to say 500 RWHP/650 crank 30k
1998 Jeep Grand Cherokee 5.9L Limited 191k
1998 Jeep Grand Cherokee 4.0 I6 laredo 256k
1990 Jeep Grand Wagoneer 126k

letank
Posts: 2454
Joined: Wed Oct 03, 2012 9:16 pm
Location: SF bay area

Re: collapsed lifters, temp solution query

Postby letank » Wed Oct 10, 2018 9:12 pm

candymancan wrote:Reason i ask is my 360 makes horrible clatter or clanking when cold started but only if i drive it.. If it starts and idles its not there.. If i drive it it chatters badly for the first 100 feet then quiets up


not too sure, as it is a tricky diagnostic, but from my experience, the collapsed lifter will rattle cold or hot, and more noticeable at idle.

may be a weak oil pump that takes time to built oil pressure, so you have a top end clatter... thinner oil such as 5w30... or add another quart of oil in the crankcase... our oil pan can take 6 quarts, somebody had a pict of our oil pan w 5 vs. 6 qt... also some of those dipstick are a bit off...
Michel
74 wag (349 Kmiles... parked, next step is a rust free body)
85 Gwag (226 Kmiles... the running test lab)
See Engine bits and Fuel and brake lines, and Body work


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