Copper Coat on OEM head gasket?....

[David D]

When putting in a stock Gunine Toyota OEM head gasket should I apply copper coat to both sides of the gasket? I have heard conflicting stories Some say cover it in copper coat, and others say dont put anything at all.

I dont think that toyota put a lot of reserch and develoment in to their head gasket to have it sprayed with copper:aigo:....any information or insight would be awesome.

Thanks!

 

[jdub]

I use copper spray on an OEM HG...both sides, it fills in imperfections on the block/head. A couple coats on each side and let dry till tacky. Lay it on the block using the index pins to align...be careful, you get one chance to do this right with the copper spray coat on the HG. The head goes on immediately and is torqued down per the TSRM sequence. Toyota designed the HG to go on as is...the copper spray just adds a bit of "insurance" to effect a good seal.

What you may be thinking about is using copper spray on a new MHG...that's NOT a good idea. The copper spray contains chemicals that attack the viton coating MHG's come with from the factory. The OEM HG does not have this coating.

BTW - you can copper spray the OEM EGR cooler gasket too

It's very important you use the correct HG torque spec....what head bolts are you using?

 

[David D]

Im goin to be using the stock head bolts

I use copper spray on an OEM HG...both sides, it fills in imperfections on the block/head. A couple coats on each side and let dry till tacky. Lay it on the block using the index pins to align...be careful, you get one chance to do this right with the copper spray coat on the HG. The head goes on immediately and is torqued down per the TSRM sequence. Toyota designed the HG to go on as is...the copper spray just adds a bit of "insurance" to effect a good seal.

What you may be thinking about is using copper spray on a new MHG...that's NOT a good idea. The copper spray contains chemicals that attack the viton coating MHG's come with from the factory. The OEM HG does not have this coating.

BTW - you can copper spray the OEM EGR cooler gasket too

It's very important you use the correct HG torque spec....what head bolts are you using?

 

[johnathan1]

Back when I replaced my head gasket in early 2006, spraying the OEM head gasket with Brake Quiet was all the rage. I sprayed mine, and it is still fine...17k miles later.

 

[David D]

isint brake quite degreaser? or is it a lubricant that the HG can slip on while it expand and contracts with temprature change?

Back when I replaced my head gasket in early 2006, spraying the OEM head gasket with Brake Quiet was all the rage. I sprayed mine, and it is still fine...17k miles later.

 

[WhtMa71]

Brake Quiet is a tacky red substance in an areosol can. I used it on my oem HG as well. It doesn't like to stick to the HG very well though.

 

[IJ.]

Brake Quiet is a high temp glue that sticks the Pad backing plates to the caliper pistons so when they retract they pull the pads away from the disc to stop them squeaking making them "quiet".....

I've tried it on HG's and can't say I was overly impressed at the results so went back to the VHT Copper spray.

 

[johnathan1]

The type I used was Blue. Any reason you prefer the copper spray over the Brake quiet, Ian?

 

[IJ.]

The Copper seems to have more "body" to it.

When I pull an engine down done with BQ I have a hard time finding any trace of it but with Copper it's quite evident.

(the BQ I used was Blue as well)

 

[mattsplat72]

Hmm IJ told me how to do it a few months back and my HG is holding
MHG+Arps+90ftlbs= ok so far lol after all it still is a 7m

 

[Clip]

i sprayed my oem hg with permatex copper spray and it's doing great with 80lb arp studs. i had the block and head resurfaced in addition.

 

[jdub]

Im goin to be using the stock head bolts

70-75 ft/lbs of torque using the TSRM sequence.

 

[gtsfirefighter]

I will be doing this this weekend hopefully. I'll be using ARP bolts. 72 lbs right??

 

[jdub]

ARP bolts are 75 ft/lbs (on an aluminum head) using moly for lube.

This is a good read...especially the "Using a Torque Wrench" link.
Note the number of tightening/loosening cycles ARP recommends to burnish the bolt threads and get an accurate torque.

http://www.arp-bolts.com/Tech/TechInstall.html

I would do a re-torque after 5 heat-up/cool-down cycles.

 

[83suprapower]

if i use oem toyota HG and the copper spray do i still use that silicon type sealant in the front by the timing cover that the tsrm recommends?

 

[WhtMa71]

Yes, use rtv. If you don't use anything you'll have a massive leak.

 

[Who]

ARP bolts are 75 ft/lbs (on an aluminum head) using moly for lube.

This is a good read...especially the "Using a Torque Wrench" link.
Note the number of tightening/loosening cycles ARP recommends to burnish the bolt threads and get an accurate torque.

http://www.arp-bolts.com/Tech/TechInstall.html

I would do a re-torque after 5 heat-up/cool-down cycles.

This reminds me of a thread I saved regarding the ARP method of tightening/loosening head bolts.

http://www.supramania.com/forums/showthread.php?t=78862

If you think its going to cause confusion edit my post. No offense taken.

 

[jdub]

Should be no confusion...the info in that thread pretty much came straight from the ARP link I posted