? Replacing roller lifters
? Replacing roller lifters Hi there
Got a quick question. I am doing my intake manifold gaskets as they are leaking, and with 235k on the clock thought I would replace the roller lifters, as I am sure they are getting old. My question is do they go in a certain way. I see there is a oil hole on the side of the lifter, does this go one particular way? Will it matter or can I just drop them in and as long as they line up with the dog bone be fine. Just need to know. Also I replaced the oil pump drive since I was in there. Car runs good, just trying to get to 300k so I can say I was there.
thanks
Andy Schuck
Got a quick question. I am doing my intake manifold gaskets as they are leaking, and with 235k on the clock thought I would replace the roller lifters, as I am sure they are getting old. My question is do they go in a certain way. I see there is a oil hole on the side of the lifter, does this go one particular way? Will it matter or can I just drop them in and as long as they line up with the dog bone be fine. Just need to know. Also I replaced the oil pump drive since I was in there. Car runs good, just trying to get to 300k so I can say I was there.
thanks
Andy Schuck
Yea that's pretty much how they go in. I would clean them off and soak them in some Oil before putting them in, that will help lube them up.
Go get a set of LS7 Lifters..they will work well.
Go get a set of LS7 Lifters..they will work well.
Umm, you want them to be pumped up when you set the valve lash...
I dont know where this dont soak them in notion came from. A VERY knowledgeable friend of mine told me the same thing.
I asked him what happened when you have a NON pumped up lifter, set vavle lash, then it gets pumped up.... It basically turns them into solid lifters lol...
I dont know where this dont soak them in notion came from. A VERY knowledgeable friend of mine told me the same thing.
I asked him what happened when you have a NON pumped up lifter, set vavle lash, then it gets pumped up.... It basically turns them into solid lifters lol...
It is not necessary to pre-pump hydraulic lifters full of engine oil prior to installation and valve adjustment. It is actually UNDESIRABLE to do so as the pumped up lifters will cause the valves to open during the adjustment process, rather than positioning the valve lifter plunger in its operating position as it is supposed to do.Using reg assembly lube on the outside is a good idea or a quick coat of your oil..but you dont want them to be pumped up like above..
Last edited by suicidal racing; Mar 29, 2010 at 05:56 AM.
Trending Topics
TECH Veteran
Joined: Dec 2008
Posts: 4,147
Likes: 62
From: Little Rock, AR
The only time a lifter might stay pumped up is at high RPM, IMHO. When you go to adjust the preload, oil is going to squish out. There should be no problem. I don't know why you would want the internals of an hydraulic lifter to be dry on startup. It would also prolong oiling to the rockers.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
a stock lifter is not a fast bleed down lifter like a rhoads lifter...what i said is the right way to do it lifters..its what comp cams recomends and others..
If your lifters are presoaked/pumped up already what do you think is going to happen when you go and put preload on them?? i can tell you 1. you will be opening your valves slightly seeing the lifter is pumped to the top already which turns it into almost a solid lifter only reason it dont is for number 2. which when you go to adj others and put load on them some will push oil out so you will have false preload on all your lifters because it takes time and the ones sitting longer will leak down and not be as pumped as your first ones..
If your lifters are presoaked/pumped up already what do you think is going to happen when you go and put preload on them?? i can tell you 1. you will be opening your valves slightly seeing the lifter is pumped to the top already which turns it into almost a solid lifter only reason it dont is for number 2. which when you go to adj others and put load on them some will push oil out so you will have false preload on all your lifters because it takes time and the ones sitting longer will leak down and not be as pumped as your first ones..
TECH Regular
Joined: Apr 2007
Posts: 420
Likes: 0
From: Kempner, TX
Maybe we have a misunderstanding as to what the terms mean; pumping/pump up/pre-pump Vs soaking/submerge them in oil
I agree, CompCams specifically says it is undesirable to "pre-pump", pumped up, pumping hydraulic lifters full of engine oil prior to installation and valve adjustment for the reason already stated by 'suicidal racing'. That information is found in both their previous and new (page 237) catalogs as well as on their website.
However, soaking is different. "Pre-soaking hydraulic lifters in a bath of engine oil is a good idea, but it is not mandatory." That's taken from the same source.
The lifter installation information I've read, contains a warning that the grease used during the assembly of the lifter must be removed before the lifter is installed. 'myltwon' is right on that one. If you consider how the grease will inhibit oil flow you'll see the reasoning for that warning.
As far as to which direction the lifter oil hole must face, I've never found anything addressing that - and I've looked. So absent any credible information saying the lifters have to be installed in a specific direction, I've concluded it doesn't matter. If it was something critical (or even important) I believe GM engineers would have included it in the Factory Service Manual.
Jake
I agree, CompCams specifically says it is undesirable to "pre-pump", pumped up, pumping hydraulic lifters full of engine oil prior to installation and valve adjustment for the reason already stated by 'suicidal racing'. That information is found in both their previous and new (page 237) catalogs as well as on their website.
However, soaking is different. "Pre-soaking hydraulic lifters in a bath of engine oil is a good idea, but it is not mandatory." That's taken from the same source.
The lifter installation information I've read, contains a warning that the grease used during the assembly of the lifter must be removed before the lifter is installed. 'myltwon' is right on that one. If you consider how the grease will inhibit oil flow you'll see the reasoning for that warning.
As far as to which direction the lifter oil hole must face, I've never found anything addressing that - and I've looked. So absent any credible information saying the lifters have to be installed in a specific direction, I've concluded it doesn't matter. If it was something critical (or even important) I believe GM engineers would have included it in the Factory Service Manual.
Jake
TECH Veteran
Joined: Dec 2008
Posts: 4,147
Likes: 62
From: Little Rock, AR
Wow, I find out after 40+ years of soaking lifters in oil that it is wrong and will cause me lots of problems trying to set the valves...wait a minute...I've never had a problem setting the valves...hmmmm...I've got to pay more attention to what I am doing. 
