Camshaft flat
#1
Newbie
Thread Starter
Camshaft flat
Hi,
I have a 2001 xj. Engine was rebuilt 2/2021. Check engine light came on and car stutters once or twice on a 30 minute drive to work. Took it into shop and they are saying computer read misfire on 5th cylinder. After looking more in to it they said it’s a flat camshaft.
question 1: shouldn’t they have seen this during engine rebuild? Or should they have replaced it?
question 2: engine rebuild is under warranty…. Should the camshaft be included? Or at least the labor?
question3: could they have messed up anything for this to have happened 7 months later?
hope you guys can help! Thanks so much.
I have a 2001 xj. Engine was rebuilt 2/2021. Check engine light came on and car stutters once or twice on a 30 minute drive to work. Took it into shop and they are saying computer read misfire on 5th cylinder. After looking more in to it they said it’s a flat camshaft.
question 1: shouldn’t they have seen this during engine rebuild? Or should they have replaced it?
question 2: engine rebuild is under warranty…. Should the camshaft be included? Or at least the labor?
question3: could they have messed up anything for this to have happened 7 months later?
hope you guys can help! Thanks so much.
#2
Senior Member
1) It may have been fine during the rebuild. It could just be an oil blockage, which can happen after a rebuild. It shouldn't, but it can.
2) yes
3) See answer to question 1
2) yes
3) See answer to question 1
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n_co (10-01-2021)
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agreen (09-30-2021)
#5
Senior Member
If the cam is damaged, it'll be covered under the engine warranty. Sometimes when an engine gets rebuilt, they'll media blast the block and then hot tank it to remove any particulate. I've gotten engine blocks back from machine shops after being blasted and tanked and they'll have crap still in them. You have to be really meticulous when cleaning them. If any of that abrasive media gets in the oil galleries, it's game over for that engine.
Blazer's right though. If that cam was new, there's a break in procedure for flat tappet cams (such as the one in the jeep 4.0). Usually a high zinc break-in oil is required to be ran for a period of time. That's why many people (such as myself) like using rotella diesel oil. If the cam was used, you shouldn't have needed to break it in. But I'd definitely expect a remanufactured engine to have a new cam.
Blazer's right though. If that cam was new, there's a break in procedure for flat tappet cams (such as the one in the jeep 4.0). Usually a high zinc break-in oil is required to be ran for a period of time. That's why many people (such as myself) like using rotella diesel oil. If the cam was used, you shouldn't have needed to break it in. But I'd definitely expect a remanufactured engine to have a new cam.
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n_co (10-01-2021)
#6
Newbie
Thread Starter
Thanks for the info. As far as I can tell they did not replace the camshaft. I attached the invoice with description. I need to talk to the shop again but based on the message they left me they want to charge me 1200 - 1500 for the fix.
doesn’t seem right to me.
doesn’t seem right to me.
#7
CF Veteran
Did you take it back for the 1000 mile check? If so, then it looks to me like you've got a warranty and they just have to fix it. Note that I'm in the UK so the laws are different over here but I can't see any loopholes in the wording on that piece of paper no matter what side of the pond you live.
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n_co (10-01-2021)
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#8
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Year: 96
Model: Cherokee (XJ)
Engine: 4.0
I bet they replaced tappets, but not camshaft ?
a possible way to cause this outcome for sure
I dont know the laws in your area, but if you followed their warranty procedure, they should really be liable
they will try and squirm out if they can, you gonna need to check the fine print
a possible way to cause this outcome for sure
I dont know the laws in your area, but if you followed their warranty procedure, they should really be liable
they will try and squirm out if they can, you gonna need to check the fine print
#11
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Year: 96
Model: Cherokee (XJ)
Engine: 4.0
Both of these give you some protection against poor business practices
If the answer is no to both, you will have to negotiate with the shop
I am not totally familiar with the Jeep I6 motor, but most similar engines require removal and a near complete tear down to replace the camshaft
#12
CF Veteran
OK, so there are no weasely "Parts only" type clauses? Because they might claim that their warranty covers parts but not the time it takes to fit them. Do they have a website with any Terms and Conditions on it?
I'd go talk to them in person, be polite, ask them to honour their warranty.If they say no, don't threaten them with bad reviews, just point out that you've always heard good things about them, you're upset that their good name isn't what you thought it was. They'll get the idea.
If they still say no, walk away before you lose your temper knowing that it isn't over.
I'd go talk to them in person, be polite, ask them to honour their warranty.If they say no, don't threaten them with bad reviews, just point out that you've always heard good things about them, you're upset that their good name isn't what you thought it was. They'll get the idea.
If they still say no, walk away before you lose your temper knowing that it isn't over.
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n_co (10-05-2021)
#14
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Year: 1998 Classic (I'll get it running soon....) and 02 Grand
Model: Cherokee (XJ)
Engine: 4.0
Should not happen. That's negligence.
It did not end well. These valve covers had oil baffles in them which did a great job of catching about a tablespoon each of blasting media. Shop guy was not amused. Bearings, etc., were also not amused.
Absolutely.
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n_co (10-05-2021)
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