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Old 12-24-2010, 12:08 PM   #1
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Angry 5 sets of bad lifters or what

I have been having so much trouble out of lifters lately I have talked to several mechanics all of them are stumped so I figured i would post on here hopefully someone will have a answer.
for some reason when I replace my lifters in my jeep cherokee 2.5l 4 cyl every time i reach 150 miles after it starts missing and i need to change the lifters because every one except a couple will be stuck up not down witch has caused the bottoms of the lifters to wear concave and has bent all 8 pushrods at one point this has happened 4 times so far one of the push rods it bent into a s shape the first time it happened

so far i have put a in a new cam and head and 5 sets of lifters

it got so bad one day that it acually knocked a whole in the bottom of one of the lifters and the lifters that get stuck are never in the same place for instance the worst ones in the bunch first time was number 1 exhaust i changed lifters then it was number 4 exhaust so i changed lifters again then it was number 2 intake then after that it was number 1 intake then number 2 exhaust

any ideas
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Old 12-24-2010, 12:21 PM   #2
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Whats your lift and duration
Is it stock aftermarket did ya get the right size.

Not trying to sound like a *****
But the cam is picky on setup.

One thing wrong and s shapes push rods
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Old 12-24-2010, 12:22 PM   #3
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Have you been priming them before install?

Also, with this type of cam/lifters they have to be changed at the same time.
New cam=new lifters
New lifers=new cam

Have you broke it in, or just start driving (20 mins at 2500rpm, IIRC)
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Old 12-24-2010, 03:08 PM   #4
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Quote:
Originally Posted by Defiance665 View Post
Have you been priming them before install?

Also, with this type of cam/lifters they have to be changed at the same time.
New cam=new lifters
New lifers=new cam

Have you broke it in, or just start driving (20 mins at 2500rpm, IIRC)
well the first time it messed up a lifter i replaced the cam with a set of lifters because the cam lobe was worn but when it kept tearing up lifters i didnt want to spend $300 bucks every 150 miles so i just replaced the lifters but they should still last at least a month even if they havent been matched up.
also the cam i put in it is stock
oh i did break it in but for only 15 min according to the book

Last edited by jamesebolton; 12-24-2010 at 03:09 PM. Reason: forgot to include info
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Old 12-24-2010, 03:16 PM   #5
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you didnt answer the possibly most important question...
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Old 12-24-2010, 03:20 PM   #6
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here is a picture if it helps any.
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Old 12-24-2010, 03:22 PM   #7
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still havent answered me...
Yes, they look screwed.
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Old 12-24-2010, 03:26 PM   #8
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oh sorry no i havent been priming them the parts place i got them at said if i primed them they would pump up to high and bend the push rods witch they do anyway
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Old 12-24-2010, 04:23 PM   #9
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hydraulic lifters = filled with oil
solid lifters = not filled with oil

Are we talking about what used to be a 100% new camshaft not something out of a boneyard or "reground".
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Old 12-24-2010, 04:32 PM   #10
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My guess is you wiped the cam the first go around and kept replacing the lifters. You need a new cam and lifters. And with all the lifter debris in the engine hopfully the engine will be ok.

Once the concave wear was on the lifter the cam was no good. I would say improper break-in. Did you use EOS or any other cam break-in additive?
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Old 12-24-2010, 05:16 PM   #11
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the cam i put in it was brand new came from napa auto parts
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Old 12-24-2010, 07:29 PM   #12
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Here are a few things you should do:
1. Make sure you're using a new cam and new lifters made in the USA.
2. Check every lifter to make sure it has a crown on the face that touches the cam lobe. You can do this by holding that face against the side of another lifter: you should be able to notice a slight bulge on the face of the lifter.
3. The cam or cam & lifter set should come with some kind of container of break-in lube that is a paste. If not, get a container of Isky Rev Lube (http://iskycams.com/cart/index.php?m...oducts_id=3964) and use that liberally on the cam lobes. Also apply it to the lifters, but only to the face, not the sides!
4. Set the lifter preload according to the method specified in the Haynes manual. If you don't have that, I can provide some of the instructions.
5. Fill the crankcase with an oil that has high zinc content, such as Shell Rotella T, Valvoline VR-1 racing oil, or something else. If the oil says ILSAC GF-4 certified, don't use it. If it says API SM, it MIGHT be OK. Newer than SM is not OK.
6. Beg, borrow, or steal a 16 oz. bottle of Engine Oil Supplement (EOS), old part number 1052367, new part number 88862586, and add that to the crankcase. A little overfilled is OK.
7. Pre-lube the engine. Buy a tool or make one from a junkyard distributor.
8. Fire it up and rev to 2500rpm immediately. Hold it there for a minimum of 25 minutes.
9. Change the oil and filter, again using a high-zinc oil, but you can skip the EOS now. Keep using a high-zinc oil for the first few oil changes.
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Old 12-24-2010, 10:38 PM   #13
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I will get a new cam when i can get back to town need to go to town anyway to get a few parts for the camanchee it has been acting up on my mother today think the idol control motor is shot it wont idol unless it is worm and it is flooding.
it is coming a snow storm right now so no telling when i will be able to get back out
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Old 12-25-2010, 04:06 PM   #14
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Quote:
Originally Posted by jamesebolton View Post
I have been having so much trouble out of lifters lately I have talked to several mechanics all of them are stumped so I figured i would post on here hopefully someone will have a answer.
for some reason when I replace my lifters in my jeep cherokee 2.5l 4 cyl every time i reach 150 miles after it starts missing and i need to change the lifters because every one except a couple will be stuck up not down witch has caused the bottoms of the lifters to wear concave and has bent all 8 pushrods at one point this has happened 4 times so far one of the push rods it bent into a s shape the first time it happened

so far i have put a in a new cam and head and 5 sets of lifters

it got so bad one day that it acually knocked a whole in the bottom of one of the lifters and the lifters that get stuck are never in the same place for instance the worst ones in the bunch first time was number 1 exhaust i changed lifters then it was number 4 exhaust so i changed lifters again then it was number 2 intake then after that it was number 1 intake then number 2 exhaust

any ideas
One possibility that hasn't yet been mentioned is whether the cam/crankshaft timing is correct. In the official shop manual, you not only have to align the timing marks, but also count the number of pins on the timing chain between the timing marks. If this hasn't been done, there is the possibility that all the damaged parts are a result of valve/piston contact. You might very well also have broken valve springs, bent valves, maybe even damaged pistons too.
The lifters in the photo are unbelieveably damaged; the camshaft they came in contact with is all FU'ed as well, without even having to look at it. I suggest: check your valve springs, valves, pistons, lifter bores for damage, if lifter bores are burred/scored they have to be honed out (oversize lifters are available), replace any damaged parts, get a new, stock camshaft and lifters, new timing chain and sprockets, prime the lifters before installation, install the camshaft-making sure of proper alignment with the crankshaft, smear generous amounts of assembly lube on the BOTTOM of the lifters and on the cam lobes PRIOR to installation. Remove the spark plugs and HAND rotate the engine, checking for any feeling of mechanical resistance (you shouldn't feel any), then button it up, replace the spark plugs, and it should run fine.
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Old 01-31-2011, 10:06 PM   #15
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Did ya find out anything
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