Is this lifter bad??? 56K Beware!!!
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Originally Posted by Cstraub
Sidestep,
Your located in the Tri-Cities aren't you? If so if you want me to send that lifter off to Morel for analysis we'll let them cut into it.
Chris
Your located in the Tri-Cities aren't you? If so if you want me to send that lifter off to Morel for analysis we'll let them cut into it.
Chris
Thanks,
Scott
FYI, the LS2 lifter tray part#
GM PART # 12595365
Originally Posted by jub jub
That's odd. I don't understand how a lifter could twist in it's bore with all the spring tension on it. I'm not doubting what your saying, just trying to figure out how a plastic tray could affect a lifter. Strange.
Originally Posted by SideStep
Guitsboy,
With the LS2 tray did you put the "indentation" up or down when you installed them in the block
With the LS2 tray did you put the "indentation" up or down when you installed them in the block
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Originally Posted by GuitsBoy
I think it may have something to do with the ls2 blocks, and why the ls1 retainers wont work in them.
Originally Posted by SideStep
You are correct about that... The LS2 blocks have material that fills that area...
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Originally Posted by GuitsBoy
So which way are they oriented in the ls2? It stands to reason that what works in the ls2 would work in the ls1 in this case.
good thinking.... I am looking for a picture of a LS2 short block now...Found it or at least a LS7... looks like the indent is on the bottom. I included the thread link also...
https://ls1tech.com/forums/generation-iv-internal-engine/446435-ls-2-disguise.html
Last edited by SideStep; Feb 21, 2006 at 09:26 AM.
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Thanks for soing all the leg work, sidestep! I cant get over how thin the material is between bores on the block. looks like you could poke through it with your finger.
Hmmm. My lifters after 47,000 miles and a comp XER lobe cam (for 25,000 with Isky springs) look like mirrors.....back in they went. This time with the PRC duals. Oh forgot to mention they were also slammed pretty hard when I recently busted a timing chain and bent 10 valves!
Originally Posted by jub jub
That's odd. I don't understand how a lifter could twist in it's bore with all the spring tension on it. I'm not doubting what your saying, just trying to figure out how a plastic tray could affect a lifter. Strange.
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From: Warner Robins, GA
Originally Posted by Teutonic Speedracer
The #10 lifter tray has one lifter slot on the end cast on an angle. It pretty much has the lifter rotated ~10 degrees so that the edge of the wheel can dig into the cam. I only had one bad lifter out of the batch and it was on the #10 casting (the one bore that was rotated). Of course mine is on a roadrace motor that saw ~4k miles at sustained HIGH rpm.
My trays were numbered 12, 13, 14 and 14. But after looking at my lifters real close, I think one or more trays might have a problem. I will have to examine them further when I have time.
Here's a pic of one of the rollers. Looks good doesn't it.
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how can you tell what lifter trays you have
also, how can you tell if a lifter if collapsed, i know what to look for on the roller part but how can you tell if it would be bad or not , thanks dwayne
becuase i had some low oil press and it starting knowcking a bit, dont know if the lifter froze up or just got dry of oil and when i get good oil pressure, itll be fine or what??? thanks guys
also, how can you tell if a lifter if collapsed, i know what to look for on the roller part but how can you tell if it would be bad or not , thanks dwayne
becuase i had some low oil press and it starting knowcking a bit, dont know if the lifter froze up or just got dry of oil and when i get good oil pressure, itll be fine or what??? thanks guys
Hey Sidestep,
Here's some pics of your old cam. I'm no expert, but it doesn't look good. Not only are a lot the lobes scored, but the back of the cam is showing high heat marks. Not sure what causes that. Maybe someone else can chime in with their opinions on this cam. I took a couple of shots of another used Comp Cam for a side by side comparison. I don't think I will be bringing it to Thunder Racing unless you want to me to get their opinion also.
RIP Mamanator 2.0
Here's some pics of your old cam. I'm no expert, but it doesn't look good. Not only are a lot the lobes scored, but the back of the cam is showing high heat marks. Not sure what causes that. Maybe someone else can chime in with their opinions on this cam. I took a couple of shots of another used Comp Cam for a side by side comparison. I don't think I will be bringing it to Thunder Racing unless you want to me to get their opinion also.
RIP Mamanator 2.0
Originally Posted by jub jub
That's odd. I don't understand how a lifter could twist in it's bore with all the spring tension on it. I'm not doubting what your saying, just trying to figure out how a plastic tray could affect a lifter. Strange.
Roller lifters HAVE to stay perfectly inline with the cam lobe.
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From: Warner Robins, GA
Originally Posted by 8a8mfh
They will turn if theres nothing stopping them. Look at the old flat tappet lifters, if they DON'T turn they fail. In normal operation they rotate.
Roller lifters HAVE to stay perfectly inline with the cam lobe.
Roller lifters HAVE to stay perfectly inline with the cam lobe.
I want to know why the cam and lifters in the pics failed.
Originally Posted by jub jub
I understand that. GM should have used a girdle between pairs like comp and the other manufactuers instead of plastic pieces.
I want to know why the cam and lifters in the pics failed.
I want to know why the cam and lifters in the pics failed.
