Metal Gasket Leak? - SR20 Forum
Nissan SR20 Forum Nissan SR20 Forum Header Right
HomeForumGalleryClassifiedsAbout UsAdvertiseContact Us

Welcome to the SR20 Forum forums.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

» Log in
User Name:

Password:

Not a member yet?
Register Now!
» Auto Insurance
» Featured Product
Wheel & Tire Center

Go Back   SR20 Forum > Main Forums > Turbo



Sr20Forum.com is the premier Nissan SR20 Forum on the internet. Registered Users do not see the above ads.
Reply
 
Thread Tools
Old 09-24-2009, 10:10 PM   #1 (permalink)
the sinner

 
Join Date: Jul 2004
Location: Philippines

Feedback Score: 0 reviews
Metal Gasket Leak?

I know most of you are familiar when we diagnose a cracked head or gasket by looking at the radiator's water making bubbles?

Well, there is bubbles that says something's wrong with either the cometic head gasket or the head itself..

Anyone experienced this? can it be fiXed by re-torquing the head bolts?
burnoutkid is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 09-25-2009, 04:50 AM   #2 (permalink)
El Lobito with many toys

 
Join Date: May 2008
Location: Chihuahua, Mexico

Feedback Score: 24 reviews
Quote:
Originally Posted by burnoutkid View Post
I know most of you are familiar when we diagnose a cracked head or gasket by looking at the radiator's water making bubbles?

Well, there is bubbles that says something's wrong with either the cometic head gasket or the head itself..

Anyone experienced this? can it be fiXed by re-torquing the head bolts?
No. Once you got bubbles of air into the radiator you got at least a blown headgasket that needs to be replaced. Retorquing will only lead into more disaster, believe me.
Wolf_SER is offline   Reply With Quote
Old 09-25-2009, 06:44 AM   #3 (permalink)
1.6L TT G35 Killer

 
Join Date: Apr 2006
Location: guam 96929

Feedback Score: 0 reviews
I have heard of cold leaks happening when using a metal head gasket.

Basically what happens, when the car is turned off coolant finds its way onto the cylinders.

This happens due to the block/head not being proprly cleaned or is warped.
__________________
NISSAN. MY ANTI-HONDA
1SIKB13 is offline   Reply With Quote
Old 09-25-2009, 05:52 PM   #4 (permalink)
Turbo Spicy Orange

 
Join Date: Mar 2005
Location: Long Island, NY

Feedback Score: 5 reviews
welcome to my world of problems
__________________
Avenier 4 Life
Bonesmugglar is offline   Reply With Quote
Old 09-25-2009, 09:37 PM   #5 (permalink)
Tryin' things

 
Join Date: Apr 2004
Location: Reno
Feedback Score: 0 reviews
I had a Cometic go like you described after a brief overheat. If you look at the specs on the gasket, it requires an Ra50 finish on both the head and the block. This is extremely smooth and much,much finer than the finish I got from the machine shop. The reason it needs to be so fine is because the gasket's viton layer is only about .001 thick! This means that even a tiny scratch that you cant even feel can cause problems. I ended up using another Cometic, but lapped both my head and my block to a very smooth surface, gave the studs a little extra torque (Golden Eagle B16a's) and did a retorque after the first 3-4 heat cycles. SO far so good even though I blasted the motor with 20psi and a 75 shot repeatedly at the strip. We'll see how it holds long term. If I had to do it again, I would go with the stock VE gasket as it is MLS but seems to have much more room for forgiveness in terms of surface finish and warpage issues. My $.02
b13bliss is offline   Reply With Quote
Old 09-29-2009, 04:04 AM   #6 (permalink)
the sinner

 
Join Date: Jul 2004
Location: Philippines

Feedback Score: 0 reviews
Quote:
Originally Posted by 1SIKB13 View Post
I have heard of cold leaks happening when using a metal head gasket.

Basically what happens, when the car is turned off coolant finds its way onto the cylinders.

This happens due to the block/head not being proprly cleaned or is warped.

If coolant/water does go into the cylinder it would at least blow white smoke out the exhaust right? mine does not blow any smoke at all except in the morning.

it does not over heat as well, I drove it hard yesterday for about a couple of hours and temp was normal.

there were oil leaks in the distributor due to its gasket but could that be the cause? still thinking the gasket is messed up but I just want to be sure before we open it up again as everything is running smooth at 12psi except these bubbles that I'm worried about.

it comes out when you rev but the water/coolant in the reservoir does not overflow.

I have a DE block with a VE head + T just in case this information will help but indeed we made sure both surface are cleaned before the gasket was placed. Grease was even applied to the gasket so it'll position itslef well when torquing.
burnoutkid is offline   Reply With Quote
Old 09-29-2009, 04:10 AM   #7 (permalink)
the sinner

 
Join Date: Jul 2004
Location: Philippines

Feedback Score: 0 reviews
Quote:
Originally Posted by b13bliss View Post
I had a Cometic go like you described after a brief overheat. If you look at the specs on the gasket, it requires an Ra50 finish on both the head and the block. This is extremely smooth and much,much finer than the finish I got from the machine shop. The reason it needs to be so fine is because the gasket's viton layer is only about .001 thick! This means that even a tiny scratch that you cant even feel can cause problems. I ended up using another Cometic, but lapped both my head and my block to a very smooth surface, gave the studs a little extra torque (Golden Eagle B16a's) and did a retorque after the first 3-4 heat cycles. SO far so good even though I blasted the motor with 20psi and a 75 shot repeatedly at the strip. We'll see how it holds long term. If I had to do it again, I would go with the stock VE gasket as it is MLS but seems to have much more room for forgiveness in terms of surface finish and warpage issues. My $.02
Then I would have to go OEM DE gasket if this is the case. I still have another 1.20 cometic in place but with these reviews about the gasket it seems that we've gone the wrong way.

i am just worried of the valve clearance to the pistons as I am running on N1 cams hoping to go 1 bar of boost at least. If the compression is too much with the stock gasket will this still be possible?
burnoutkid is offline   Reply With Quote
Old 09-29-2009, 03:38 PM   #8 (permalink)
SR20 Turbo Inside

 
Join Date: Jun 2007
Location: Miramar, FL

Feedback Score: 0 reviews
go to any radiator repair shop and they can do a chemical test that would show if any exhaust gases has entered the coolant
kevwal is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  SR20 Forum > Main Forums > Turbo


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Powered by vBadvanced CMPS v3.2.2

All times are GMT -4. The time now is 12:04 AM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.3.2
© The SR20 Forum - Content from this site may not be used without permission