head gaskets

[Programmer]

Cool--what do you charge for this. I've got some '98 Intrepid 3.5L
heads with a little warpage thing happenin'.
Lyndon.
-----Original Message-----
From: Len Sabatine <sabatine at epix.net>
To: gmecm at diy-efi.org <gmecm at diy-efi.org>
Date: November 14, 2000 10:46 PM
Subject: Re: head gaskets


>   Ok then ,very small Boat. Alum Head thermal straightening usually
>   will only require bout .005 to cleanup and the cam[s] turns WO/ Bind.
>  This method also retains Valve Stem  Indexing .
>   We utilize a 2" iron plate and  Bayco cleaning Oven. Works well .
>   Len
>>Depends on the boat <BG>. I've never run into
>>anyone who does that up here...sounds like it'd work.
>>Lyndon.
>>-----Original Message-----
>>From: Len Sabatine <sabatine at epix.net>
>>To: gmecm at diy-efi.org <gmecm at diy-efi.org>
>>Date: November 14, 2000 7:19 PM
>>Subject: Re: head gaskets
>>
>>
>> >    Many "Bent " OHC head castings are successfully repaired by shimming
@
>> >    high spot on a torque plate , torque them to spec , then relaxing
them
>> >in an
>> >    oven. OHC castings must be straightened in this manner prior to
>>resurfacing
>> >    or for sure , the cam won't turn. These heads don't  make good boat
>> >anchors.
>> >    Len
>> >
>> >>It's a bigger problem with the OHC heads...cam bore distortion gets
>> >>pretty bad with a re-torque after machining beyond the spec. We
>> >>just chuck 'em...it's not worth a comeback.
>> >>Lyndon.
>> >>-----Original Message-----
>> >>From: Bruce Plecan <nacelp at bright.net>
>> >>To: gmecm at diy-efi.org <gmecm at diy-efi.org>
>> >>Date: November 13, 2000 9:57 PM
>> >>Subject: Re: head gaskets
>> >>
>> >> >This sound primitive.
>> >> >I have a 2" wide 24" long file.
>> >> >If a head fails the flatness with a straight edge I use the file.
>> >> >Sometimes is just almost accidential they fail the straight edge
test.
>> >> >Other then the OHC stuff I've fudged things without dire results, on
my
>>own
>> >> >stuff.
>> >> >bruce
>> >> >
>> >> >
>> >> >
>> >> >----- Original Message -----
>> >> >From: "Programmer" <nwester at eidnet.org>
>> >> >To: <gmecm at diy-efi.org>
>> >> >Sent: Sunday, November 12, 2000 5:44 PM
>> >> >Subject: Re: head gaskets
>> >> >
>> >> >> .005" ?? I'd only settle for .000"
>> >> >>  Nowdays, .006 can be the
>> >> >> warp discard of the head...
>> >> >>
>> >> >> Lyndon.
>> >> >> -----Original Message-----
>> >> >> From: John_Calabrese at ENGELHARD.COM <John_Calabrese at ENGELHARD.COM>
>> >> >> To: gmecm at diy-efi.org <gmecm at diy-efi.org>
>> >> >> Date: November 10, 2000 7:47 AM
>> >> >> Subject: Re: head gaskets
>> >> >>
>> >> >>
>> >> >> >I would have the surfaces not only checked for straightness, but
>> >> >> >refinished, maybe even the block as well,  The surface should have
a
>>max
>> >> >> >.005" distortion to it, and a proper finish (120 rms?)  for good
head
>> >> >> >gasket sealing.  Putting it back together and just cleaning
surfaces
>> >> >really
>> >> >> >isn't that god of an idea
>> >> >> >
>> >> >> >Just my.02
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >> >John L. Calabrese
>> >> >> >Research Engineer
>> >> >> >Environmental Technologies Group
>> >> >> >Engelhard Corporation
>> >> >> >
>> >> >>
>> >>
>>
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