Re: AMC I-6 Oil weapage / leakage / seepage

[farna@xxxxxxx]

Okay, I admit it, this is one of those times I overstepped!! I don't have a lot of personal experience with the plastic cover. I have sealed one or two for people that worked, but I can't say exactly how long. I've only had to replce one with a metal cover, but it was cracked. 

On October 22, 2004 Jim B wrote:

> A: More like a design flop! Even I had trouble getting my Eagle's plastic
> cover to stop bleeding all over the place! (I redrilled the holes and fixed
> the way the aftermarket used cover I got mounted and even with black
> silicone I STILL had minor weepage at freeway speed!) Ford and Chev have
> been having major probs due to the same junk design. Ford is paying million$
> to cure the 4.6L plastic intake problems.
> 
> 
> From: farna@xxxxxxx
> Subject: Re: AMC I-6 Oil weapage / leakage / seepage
> To: mail@xxxxxxxxxxxx
> Message-ID: <ADVANCES62ZbLAX3cf3000001cf@xxxxxxxxxxxxxxxxxxxxxxx>
> 
> I wouldn't exactly call it a "design flaw", though I know the plastic valve
> cover is much hated. It will warp over time, but the cars/engines were made
> to last around 10 years with few problems. That being the general design
> criteria, I'd say they met that. Most didn't start to leak until 15-20 years
> old. The last AMC car made was the 88 Eagle, it's 14 years old (but doesn't
> it use an aluminum valve cover?). A lot of the leaks are caused by people
> reinstalling too. The plastic valve covers really need to be snugged up but
> very little torque on the bolts. To much uneven pressure around it and it
> will always warp. Surfaces need to be squeaky clean before applying sealant
> too. It worked well, but I don't have an inch-pound torque wrench, and most
> mechanics wouldn't take the time on a valve cover unless they already knew
> it was a problem area. SO I agree with you in one respect -- it wasn't the
> brightest idea in the long run, but I wouldn't say it's a design flaw from
> an engineering standpoint.

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