Give me your opinions on these lifters
03-07-2011, 06:45 AM
#1
Give me your opinions on these lifters I'm in the process of doing my LQ4 build, and I was planning on re-using the lifters that came with the shortblock since they only have 40k-ish miles on them. Now I'm getting paranoid about them and wondering if I should replace. I have an EPS cam spec'd by Pat G that was spec'd with stock lifters in mind, so I'm concerned about going to LS7 lifters since I've read that they can change your pushrod length and I've already bought new TFS custom length pushrods per Pat G's specs.
Let me know what you guys think. I thought they looked to be in pretty good shape. Tips show virtually no wear, and the rest of the lifter itself also looked good. This is just a random lifter I selected...the rest are in the same condition.
Let me know what you guys think. I thought they looked to be in pretty good shape. Tips show virtually no wear, and the rest of the lifter itself also looked good. This is just a random lifter I selected...the rest are in the same condition.
03-07-2011, 07:09 AM
#2
Personally I wouldnt put used lifters on a new cam, due to the lifter has already established a wear pattern on the old cam, not to mention they could have contaminents in them from the original combo that will transfer right into your new build. LS7 lifters are a lil different, they are the same length on the outside but the cup position is different on the inside. the only way to be sure is to measure.
03-07-2011, 09:35 AM
#4
Is the general consensus that any time you do a cam swap you should replace the lifters as well? It seems like I see all kinds of people on here doing the cam only, especially in a lower mileage car. Or is it the fact that since the heads are already off, then it's one of those "while you're in there it's a good thing to go ahead and..." things?
03-07-2011, 09:37 AM
#5
Personally I wouldnt put used lifters on a new cam, due to the lifter has already established a wear pattern on the old cam, not to mention they could have contaminents in them from the original combo that will transfer right into your new build. LS7 lifters are a lil different, they are the same length on the outside but the cup position is different on the inside. the only way to be sure is to measure.
03-07-2011, 10:44 AM
#6
Yes, even though it is a roller it is still a metal on metal situation establishing a wear pattern. You really dont want to be doing this again So your best bet is to replace the lifters, and probably a new set of pushrods,,I have sold two sets of pushrods on this site, they went fairly quickly and I didnt get beatup too bad,,cant sell em for new price, even though they are, people will just buy the new ones, knock a lil off the price and they will go....OR you can hust re-use the ones you have, and you may be fine,,,its that may part that sometimes hits your wallet real hard though.
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03-07-2011, 02:41 PM
#12
The wear pattern thing really doesn't apply to roller lifters otherwise they wouldn't roll. They can wear down and so can cam lobes. Are you fine reusing them yea sure. But if it was my build I would have got the ls7 ones because pulling heads for lifters isn't exactly a 5 minute job.
03-07-2011, 04:25 PM
#14
Nothing is gonna bite his ***.........I see no good reason not to reuse them. Its no different than reusing the pistons and crank if they are not worn. Geez our society has really groomed you young guys to just toss things away.....If you think new lifters can't give you problems too you are greatly mistaken.
03-07-2011, 04:31 PM
#15
There are many many guys on this forum who have replaced cams with many more miles than yours without replacing the lifters.
Just look at them closely for any surface irregularities like scratches, chips, voids, pits, etc. If they are smooth and shiny without irregularities, I can't see any reason to worry.
Just look at them closely for any surface irregularities like scratches, chips, voids, pits, etc. If they are smooth and shiny without irregularities, I can't see any reason to worry.
03-07-2011, 09:08 PM
#16
there are also many guys who have re-used their parts and had it come right back and bite them in the tail also..It all comes down to what you feel comfortable doing. Anyone who thinks that two pieces of metal riding on each other does not cause a wear pattern does not know what they are talking about, The truth of it all is its your money and your build, so your decision. I wouldnt put a set of 40K mile lifters on my new 400 dollar cam. But I went with the morels in my stroker so my opinion is different than others.
03-08-2011, 02:16 AM
#17
AGREE with raron455 I wouldnt reuse old lifters reguardless if there good. Im not saying you can't, I've seen people do it and have no bad outcome but I've also seen people miss the tiniest imperfection and it screw them. so ultimately its your own personnel preference. Choose wisely.
03-08-2011, 06:22 AM
#18
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cams all have front to rear movement so the wear pattern is not a constant. Even the crank has .007 front to rear movement. No scratches, go with it or new lifters. You are the one who has to live with it.
03-08-2011, 07:48 AM
#20
Ls2 trays are cheap from scoggin again up to you on that. I replace everything on my builds, but that is me. Ill take my chances with new parts and manufacturing defects rather than used parts