Re: Mopar Performance Lifters Problem
[Re: LemonTwiist]
#88122
07/14/08 06:57 AM
07/14/08 06:57 AM
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Joined: Jan 2003
Posts: 74,974
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JohnRR
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I Win
Joined: Jan 2003
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Quote:
I posted a couple of weeks ago about a thermoquad issue on a 340 that I thought I had. Well it turns out that the problem is with the lifters. I could not get the engine to run right so I had another carb installed that worked, and still a rough idle. I took the valve covers off today and discovered a lifter had come apart and the plunger cap was laying in the lifter sidways. Has anyone else had problems with the Mopar Performance cams and lifters?
i had the same thing happen with an MP 484 smallblock cam .
you better get out the wrenches because when that happenes it stops the lifter from rotating and flattens the cam lobe in short order , the reason for your rough running issue .
motor has to come out and be completely gone thru , metal is everywhere
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Re: Mopar Performance Lifters Problem
[Re: JohnRR]
#88123
07/14/08 11:11 AM
07/14/08 11:11 AM
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Anonymous
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Anonymous
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it could have been a preload problem. If you run too little preload, the lifter cup will smack against the retainer clip and eventually pop it out
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Re: Mopar Performance Lifters Problem
[Re: LemonTwiist]
#88125
07/14/08 10:35 PM
07/14/08 10:35 PM
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Anonymous
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Anonymous
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Quote:
Quote:
i had the same thing happen with an MP 484 smallblock cam .
you better get out the wrenches because when that happenes it stops the lifter from rotating and flattens the cam lobe in short order , the reason for your rough running issue .
motor has to come out and be completely gone thru , metal is everywhere
I don't think I damaged the cam yet. The lobe looks good. The motor hasn't run long enough to do any damage, hopefully
Would you really want to take the chance?
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Re: Mopar Performance Lifters Problem
[Re: LemonTwiist]
#88126
07/15/08 08:52 AM
07/15/08 08:52 AM
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Joined: Jan 2003
Posts: 74,974
U.S.S.A.
JohnRR
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I Win
Joined: Jan 2003
Posts: 74,974
U.S.S.A.
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Quote:
Quote:
i had the same thing happen with an MP 484 smallblock cam .
you better get out the wrenches because when that happenes it stops the lifter from rotating and flattens the cam lobe in short order , the reason for your rough running issue .
motor has to come out and be completely gone thru , metal is everywhere
I don't think I damaged the cam yet. The lobe looks good. The motor hasn't run long enough to do any damage, hopefully
i'll assume you pulled the intake and took a good look at the cam ?
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Re: Mopar Performance Lifters Problem
[Re: LemonTwiist]
#88130
07/17/08 07:36 AM
07/17/08 07:36 AM
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Anonymous
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Anonymous
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I dont believe you said what cam this was. What was it? what springs were in it? did you check the installed height of the springs? did the lifters spin easy in the bores? did they slide into the bores with a slight THUMP when they hit the cam? doid you use ZDDP or EOS as a cam lube? Did you break in the cam by running it between 2500 and 3500 for 20 to 30 minutes? what pistons are in it? did you check valve to piston clearance?
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Re: Mopar Performance Lifters Problem UPDATE!!!
[Re: LemonTwiist]
#88133
12/16/08 03:45 PM
12/16/08 03:45 PM
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Anonymous
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Anonymous
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Quote:
Well here is what was wrong with the lifters and cam. After removing the cam and finding out I had wiped it out, I stopped by Mopar Performance at the Nats to show them what had happened. They took the cam and lifters back to inspect them. I got a call about a week later from them and they admitted that I had received a high lift cam in a stock application box. They did give me a new cam and some parts to compensate me for the issue. It turns out that I'm not the only one who this has happened to. I have a friend who got a stock cam for a six pack engine but ordered a roller cam. The box came with roller rockers and a stock cam. BEWARE before you install any Mopar cam to be sure to verify what you want is what you got. As a side note, I did get the engine back together and fired it this past weekend. Runs like a champ
man, thats nuts!!
I ordered a MP cam bolt and washer and the bolt that was in the package was METRIC. i couldnt figure out (at first) why it wouldnt screw in. then i looked at it and said [Edited by Moparts - Keep it clean] is this all about? kinda strange for them to be packaging mertric bolts. a cam is a pretty big mistake
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Re: Mopar Performance Lifters Problem UPDATE!!!
[Re: screamindriver]
#88135
12/16/08 06:40 PM
12/16/08 06:40 PM
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Joined: Apr 2004
Posts: 806
Mechanicsburg, PA
LemonTwiist
OP
super stock
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OP
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Joined: Apr 2004
Posts: 806
Mechanicsburg, PA
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Quote:
Hi Drew, I remember talking to you about that cam issue back in the summer at the Zembo car show we were at and guess what ???....Same deal, my buddy asked me to take a look at a MP purple cam he had ordered and turned out to be the wrong cam in the box !!  ...I caught this one before it went in the engine luckily...No matter how they compensated you it still is'nt acceptable{and a major pain in the you know what} to recieve the wrong parts then have to chase down someone that will correct the problem...Not to mention {in your case} building the engine for the second time... What a mess....
Hi Colin What was concerning to me was the remark that was made when I brought the cam into the Mopar booth at the nats. Some guy said to the tech I was talking to "another bad cam?" My friend purchased his cam from Jegs and they wouldn't do anything about it. Fortunately he builds engines and can use the cam he got wrong in another engine. You have to wonder how many other packaging errors are out there just waiting to ruin someones rebuild?
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