HG Install help

907mge · 04-12-2010, 01:14 AM

I insatalled the head without puting the seal packing between the head and block in the two places at the front. Is it worth taking it back off to put it in? Also which direction do the cam seals go at the front?

cre · 04-12-2010, 01:49 AM

Yes, the packing is a must.

The seals go in with the solid face facing out or forward. If you look at the seals there are also arrows showing the direction of cam rotation. But the solid face faces front and the hollow faces in.

907mge · 04-12-2010, 02:02 AM

so if I take the head back off I guess I will need a new head gasket?

cre · 04-12-2010, 02:03 AM

If it's an OEM type (aka composite) then yes.

907mge · 04-12-2010, 02:14 AM

Also, is there anything I should put on the gasket? I heard of some who use some sort of copper spray.

cre · 04-12-2010, 04:35 AM

Quote:

Originally Posted by 907mge

Also, is there anything I should put on the gasket? I heard of some who use some sort of copper spray.

That depends entirely on the type of gasket. The only dressing that's safe to use in all cases is Hylomar's "free" dressing. If you know for sure that the gasket has no dressings already on it you may use Permatex copper gasket dressing or Hylomar blue or aerosol gasket dressing. The OEM composite HG is not coated, but aftermarket gaskets may be. Personally, I think you can get away with dressings on just about any HG as long as you only put on a thin coat, do it in a couple layers and give each layer a couple minutes for the solvents to escape.

907mge · 04-12-2010, 10:27 AM

If I can't find either chemical would I be ok without dressing?It doesen't say anything about dressing in TSRM but then again the torque is well off that much I do know. It's a felro hg since thats whats on it now and it will take too long to get a toyota one.

cre · 04-12-2010, 01:04 PM

With a composite gasket (Felpro or Toyota) I'd use dressing. You shouldn't have any trouble at all finding the Permatex spray.

Green7mgte · 04-12-2010, 03:08 PM

just to further this discussion what is the purpose and benefits of applying a dressing to your HG?
allowing a better seal? and possible prevention of "weak seals?"

cre · 04-13-2010, 12:43 AM

There are a few purposes. Proper dressings don't dry or solidify like paint does (hence the reason I've NEVER understood why some people say to "just use silver spray paint")... it's also tacky (see: better adhesion) and serves as a dielectric buffer. I've also heard some say that it promotes heat transfer but I've yet to hear how it could possibly make any significant difference.

04-12-2010, 01:14 AM	#1
907mge 20psi boost Join Date: Dec 2009 Location: Harrisburg Posts: 759	HG Install help I insatalled the head without puting the seal packing between the head and block in the two places at the front. Is it worth taking it back off to put it in? Also which direction do the cam seals go at the front?

04-12-2010, 01:49 AM	#2
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Yes, the packing is a must. The seals go in with the solid face facing out or forward. If you look at the seals there are also arrows showing the direction of cam rotation. But the solid face faces front and the hollow faces in. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

04-12-2010, 02:03 AM	#4
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	If it's an OEM type (aka composite) then yes. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

04-12-2010, 01:04 PM	#8
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	With a composite gasket (Felpro or Toyota) I'd use dressing. You shouldn't have any trouble at all finding the Permatex spray. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

04-12-2010, 03:08 PM	#9
Green7mgte Supra Forum Moderator Join Date: Nov 2009 Location: Green-Ohio Posts: 1,297	just to further this discussion what is the purpose and benefits of applying a dressing to your HG? allowing a better seal? and possible prevention of "weak seals?" __________________ 92 Ma71 7mGTE Auto. SafcII Supra FAQ Supra MKIII FAQ Classified Section guidelines :

04-12-2010, 02:02 AM	#3
907mge 20psi boost Join Date: Dec 2009 Location: Harrisburg Posts: 759	so if I take the head back off I guess I will need a new head gasket?

04-12-2010, 02:14 AM	#5
907mge 20psi boost Join Date: Dec 2009 Location: Harrisburg Posts: 759	Also, is there anything I should put on the gasket? I heard of some who use some sort of copper spray.

04-12-2010, 10:27 AM	#7
907mge 20psi boost Join Date: Dec 2009 Location: Harrisburg Posts: 759	If I can't find either chemical would I be ok without dressing?It doesen't say anything about dressing in TSRM but then again the torque is well off that much I do know. It's a felro hg since thats whats on it now and it will take too long to get a toyota one.

04-13-2010, 12:43 AM	#10
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	There are a few purposes. Proper dressings don't dry or solidify like paint does (hence the reason I've NEVER understood why some people say to "just use silver spray paint")... it's also tacky (see: better adhesion) and serves as a dielectric buffer. I've also heard some say that it promotes heat transfer but I've yet to hear how it could possibly make any significant difference. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
anyone install aftermarket stereo?	dannydavi	Car Audio and Alarms	10	03-17-2012 10:41 PM
Boost gauge install location	Durandal	MKIV Supra	1	07-26-2009 11:55 AM
water temp gauge install	sundevil1	MKIII Supra	3	12-09-2008 04:38 PM
How to install a oil temp controller ?	Supra-Iceman	Non-Generation Specific Questions	4	01-30-2007 11:18 PM
hks TT install	mizuboi	MKIII Supra	11	11-17-2006 03:04 AM