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Re: anyone have GOOD luck with the mopar alum hemi head
[Re: Quicktree]
#658106
04/03/10 01:36 PM
04/03/10 01:36 PM
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Joined: Jul 2006
Posts: 4,179
California
mickm
master
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master
Joined: Jul 2006
Posts: 4,179
California
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personally, i think this is getting people too riled up. yes, there was a problem with at least one run of these heads, but how many are out there that have never had a problem? i know a guy not far from here with a 528 blown hemi putting out at least 1200 hp, and he is running these heads. when something like this happens, people talk. with the internet, it's a small community, and so word gets around. if someone could show me that 40% of these heads drop seats, then i would probably do something about it. but in the end, i'm sure the percentage is pretty small to the number of heads out there running just fine. yes, you COULD get eaten by a shark, but have you ever looked at the number of people who swim in the ocean every year and the number who are bitten? (best example i could come up with off hand  )
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Re: anyone have GOOD luck with the mopar alum hemi head
[Re: mickm]
#658107
04/03/10 02:17 PM
04/03/10 02:17 PM
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Joined: Jan 2003
Posts: 1,374
Houston,Tx.
Lee446
pro stock
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pro stock
Joined: Jan 2003
Posts: 1,374
Houston,Tx.
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Mickm, I don't agree. Apparently we have at least four instances on this forum alone. Statistically, when you consider how few people on this forum have a Hemi, then figure how many of those are using the MP aluminum head as opposed to the other brands. I suspect that it is a fairly significant anamoly, all things considered. If it were about wedge heads, the proportion would probably be less significant. I know that if there is a way to test these heads for this problem, I will tear down my engine in a heartbeat rather than chance carrying a 20K engine home in a steel sack! What heads are you running on your Hemi?
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Post deleted by Defbob
[Re: Lee446]
#658108
04/03/10 02:45 PM
04/03/10 02:45 PM
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Anonymous
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Anonymous
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Re: anyone have GOOD luck with the mopar alum hemi head
#658109
04/03/10 03:15 PM
04/03/10 03:15 PM
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Joined: Jul 2006
Posts: 4,179
California
mickm
master
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master
Joined: Jul 2006
Posts: 4,179
California
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hey guys. i'm not saying this isn't an issue. all i'm saying (for myself) is that i think if you look at the total number of these heads out there in use, and the number of failures, my bet is that it isn't that significant a number.
now, since i have absolutely no clue of these numbers, i may be dead wrong, and it may be more significant than i think. but i have met and heard of a lot of people running these heads who have no issues with them.
i agree if there was a way to check this, i would do it as well. but since there isn't, there are two choices. 1) run them, 2) buy a different set of heads. 2) is out of the question for me, so ding! ding! ding! 1) is the winner!
all i can say is i really hope that we hear fewer and fewer of these stories.
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Re: anyone have GOOD luck with the mopar alum hemi head
[Re: Lee446]
#658110
04/03/10 03:16 PM
04/03/10 03:16 PM
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Joined: Jul 2006
Posts: 4,179
California
mickm
master
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master
Joined: Jul 2006
Posts: 4,179
California
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Quote:
What heads are you running on your Hemi?
i'm running the mopar aluminum, but i don't know when they were produced.
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Re: anyone have GOOD luck with the mopar alum hemi head
[Re: 1_WILD_RT]
#658112
04/03/10 04:44 PM
04/03/10 04:44 PM
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Joined: Jul 2006
Posts: 4,179
California
mickm
master
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master
Joined: Jul 2006
Posts: 4,179
California
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yeah, again it's kind of simple. if there was a way to check, i would. otherwise i'm just going to run it and not worry about it, and hopefully i'll never make the list!  and let me add that hopefully no one else here will!
Last edited by mickm; 04/03/10 05:11 PM.
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Post deleted by Defbob
[Re: mickm]
#658113
04/03/10 08:14 PM
04/03/10 08:14 PM
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Anonymous
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Anonymous
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Re: anyone have GOOD luck with the mopar alum hemi head
[Re: 3ddart]
#658116
04/03/10 09:59 PM
04/03/10 09:59 PM
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Joined: Nov 2003
Posts: 6,293
Rock Springs
Bob_Coomer
master
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master
Joined: Nov 2003
Posts: 6,293
Rock Springs
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I hope the newer batch of MP heads are better. I have heard the casting diff is night and day. Edelbrock is casting the new ones for Ma Mopar. I the newer designed is approved, and run by the Super Stock guys. A disaster like this would be nothing short of a the worst nightmare coming true... I have some money in these at this point. 
[color:"red"]65 Hemi Belvedere coming soon [/color]
[color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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Re: anyone have GOOD luck with the mopar alum hemi head
[Re: B G Racing]
#658118
04/04/10 10:13 AM
04/04/10 10:13 AM
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Joined: Jan 2003
Posts: 3,443
Northern N.J.
hemi_doug
master
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master
Joined: Jan 2003
Posts: 3,443
Northern N.J.
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Here is what happens when you TRUST Mopar Performance....
71 440-6 4spd & 69 Hemi 4spd
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Re: anyone have GOOD luck with the mopar alum hemi head
[Re: hemi_doug]
#658119
04/04/10 10:15 AM
04/04/10 10:15 AM
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Joined: Jan 2003
Posts: 3,443
Northern N.J.
hemi_doug
master
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master
Joined: Jan 2003
Posts: 3,443
Northern N.J.
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The piston side... That seat popped out after about 2000 miles..... I would not and will never buy another set of aluminum MP heads without replacing the seats as a MANDITORY requirement..... Saving 200 bucks cost me 8 grand.....You still wanna take that chance? I know what I would have done had someone warned me.... Here is a hint that the "trouble" is on it's way.... IF you have a valve tap that comes and goes...SHUT IT DOWN AND GET THOSE FREEKIN HEADS OFF THAT MOTOR ASAP! OH...and all those pieces....took out 4 other cylinders...I was lucky I didn't have to sleeve the block...but now I'm .060 over on a block that has about 20,000 miles.  
71 440-6 4spd & 69 Hemi 4spd
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Post deleted by Defbob
[Re: 3ddart]
#658120
04/04/10 10:54 AM
04/04/10 10:54 AM
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Anonymous
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Re: anyone have GOOD luck with the mopar alum hemi heads
#658121
04/04/10 11:24 AM
04/04/10 11:24 AM
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Joined: Nov 2003
Posts: 2,715
closer to Canadian beer!
torkrules
I'm neurotic
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I'm neurotic
Joined: Nov 2003
Posts: 2,715
closer to Canadian beer!
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Quote:
want to guess what casue this
Holy crap Fred, is that out of a Hemi or an R2800 Pratt and Whitney radial engine? What's that a 5" bore?
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Re: anyone have GOOD luck with the mopar alum hemi head
[Re: hemi_doug]
#658123
04/04/10 12:11 PM
04/04/10 12:11 PM
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Joined: Jul 2006
Posts: 4,179
California
mickm
master
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master
Joined: Jul 2006
Posts: 4,179
California
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Quote:
Here is a hint that the "trouble" is on it's way....
IF you have a valve tap that comes and goes...SHUT IT DOWN AND GET THOSE FREEKIN HEADS OFF THAT MOTOR ASAP!
now this is great to know! at least there is some sign that it might be happening. obviously this won't come up every time, but at least there is SOME sign.
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Re: anyone have GOOD luck with the mopar alum hemi head
[Re: 3ddart]
#658124
04/04/10 12:17 PM
04/04/10 12:17 PM
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Joined: Jul 2006
Posts: 4,179
California
mickm
master
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master
Joined: Jul 2006
Posts: 4,179
California
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Quote:
guys i'm not trying to fan the fire here, i would like some #s on how wide spread this problem is. i (1) can't eat the cost to take mine apart to check what? (no ones seems to know how to tell good 1s from bad other then them having mp on them) (2) i can't eat the cost of a junk hemi. and (3) i couldn't sell them to someone thinking there is a chance it could happen to them, that would make me no better then the culprits i'm ?ing about. i'd just like to know how widespread this problem is. the shark senerio is good unless your the 1 biten!. anybody holding out on us out there? dave
i think the only thing that you could really do is to take the heads off and have the seats replaced.
it doesn't make sense to own and drive the car if the whole time you are thinking about whether the engine is going to waste itself. that just takes all the fun out of it.
now that you know this is an issue, is knowing the numbers really going to make you feel any better?
couple hundred for gaskets, get an estimate to replace the seats, and go from there.
do what you need to do to make it fun to drive, not a constant worry.
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not that I will ever finish my hemi. but my cnc ported aluminum heads by ModernCyl are setting there ready to go. I am concerned about the valves and the seats. will those veavles stand a large roller (low 700 lift)? I alreday have the springs set up for one.
