need some help with Head advice/HG

[suprafanatic]

geting the head gasket job done on my car.. the shop said the head was warped slightly more than they can resurface, unless they had a shim? or a head gasket that is .5thousanths thicker than stock... what should i do? this is the 3rd head i'v gone threw trying to get to work

 

[MassSupra89]

A shim for the head? Sounds like they want to deck the head to flat, and put a thicker HG in. This is a bad idea. You need a new head. Buy a rebuilt head but make sure it's straight, and not decked too much. Using a stock gasket or MHG?

 

[suprafanatic]

i got a felpro,, there not wanting to make it totaly flat,, there just saying its slightly beyond what they would normal want to do with the gasket that i have.. so i need a thicker gasket and it would work. what kind of gasket should i go with? i dont know the thickness of my felpro. i know HKS makes different thicknesses

 

[suprafanatic]

they said it was like 1 or 2 thousands beyond what they would want to resurface it to?? and if they did i would need alittle bit thicker of a head gasket.. anyone know how thick the felpro gasket is?

 

[JustAnotherVictim]

He said or a head gasket.
If they can make it flat then just run a thicker metal head gasket you'd be looking at about a 2mm.
You should get the deck surfaced too though.

 

[jdub]

If the head is warped greater than 0.10mm (0.0039"), the TRSM says it needs to be replaced.
http://www.cygnusx1.net/supra/Library/TSRM/MK3/manual.aspx?S=EM&P=42

If your head deck is warped, so are the saddles for the cams.

Using a thicker HG is not a good idea.

Give these guys a look (especially since you are using a stock HG):
http://www.headsonly.com/

 

[suprafanatic]

they dont have a head for an 87 on that site.. i just looked

 

[jdub]

Cressida/Supra:
6cylinder 82-88 2.8 dual cam/5MGE.......................................$275.00
6cylinder 86-92 3.0 dual cam/7MGE.......................................$425.00
6cylinder 87-92 3.0 dual cam/7MGTE.....................................$425.00

Really! Could have fooled me

 

[JustAnotherVictim]

geting the head gasket job done on my car.. the shop said the head was warped slightly more than they can resurface, unless they had a shim? or a head gasket that is .5thousanths thicker than stock... what should i do? this is the 3rd head i'v gone threw trying to get to work

After re-reading this I'm confused.
What did they say the warpage was at?
Would you mind clarifying that part in the bold? Throwing a ? in the middle of a sentence is very confusing if it's not meant to be there.

The gte heads are all basically the same one from any year will work.

 

[jdub]

A 7M-GE head will work too...it's the cams that are different.

The only worry I would have is you don't know the history of a head purchased from these guys...was it over heated, resulting it it getting annealed. If you did get one, I would also check the thickness...116mm from deck to valve cover surface. That will tell you how much material was removed and give you an idea if it was warped as well.

 

[suprafanatic]

it was warped 1-2 THOUSANTHS more than they would usualy resurface... so .101mm or .102? mm they said if i had a head gasket that was 5 THOUSANTHS thicker it would work

 

[suprafanatic]

this head we are working with now came off a JDM motor

 

[suprafanatic]

i was told by another member on here that that amount of .001 or .002 really isnt that much if i got a thicker and forgiving head gasket and just had them take off slightly over the .10mm it would work im using ARPs and torqueing them down to like 85ft lbs

 

[jdub]

If it exceeds the TRSM spec, I would not use it...personally I'd believe the book over hearsay. Like I said, your cam saddles are warped as well, and that has nothing to do with the HG used.

On the other hand, you might get away with it...But, what do I know

 

[suprafanatic]

just talked to the shop agian.. they said other that the bottom of the head being warped the rest of the head is fine and in great shape to be used.. just need a thicker gasket to make up the difference

 

[JustAnotherVictim]

A 7M-GE head will work too...it's the cams that are different.

True.
I was just under the impression if his head was warped badly enough to replace he probably wouldn't want to use the cams from it.

 

[Piratetip]

Sorry to burst your bubble but when the head overheats and warps, the ENTIRE HEAD will warp.
Its not localized to the bottom sealing surface.

Decision is up to you but I wouldn't use the head, as mentioned before.

 

[jdub]

just talked to the shop agian.. they said other that the bottom of the head being warped the rest of the head is fine and in great shape to be used.. just need a thicker gasket to make up the difference

LOL...why did you even ask?
Looks to me you've made your mind up and are hellbent to use it regardless of what's said here. I look forward to your future "new problem" thread.

 

[suprafanatic]

what will my new problem thread say?

 

[jdub]

Likely something about the valve train or a new BHG.