Exhaust manifold leak symptoms

Q&A regarding engines, turbos, and intercoolers and power upgrades

Exhaust manifold leak symptoms

Postby Rallly » Sat Jun 10, 2017 4:15 pm

Can someone tell me what negative things will happen to my performance with my 91 AllTrac 2nd Gen 3SGTE with a pretty bad leak on both ends of my oem exhaust manifold? Sounds like crickets when I punch it! Haha
Members don't see the above ad. Register now - it's free!
Rallly
Club Member
 
Posts: 185
Joined: Wed Jul 29, 2015 12:31 am

Re: Exhaust manifold leak symptoms

Postby underscore » Sun Jun 11, 2017 7:41 am

It'll hurt your fuel economy, throttle response and power, and the exhaust gases might damage something nearby.
★ 1991 GTFour RC ~ "Rebel Scum" ★
It's for sale! http://www.alltrac.net/phpBB2/viewtopic.php?f=64&t=52181
Build thread http://www.alltrac.net/phpBB2/viewtopic.php?f=44&t=44216
underscore
GTFour God
 
Posts: 3809
Images: 0
Joined: Mon Apr 09, 2007 11:29 pm
Location: Kelowna, BC

Re: Exhaust manifold leak symptoms

Postby Rallly » Sun Jun 11, 2017 12:11 pm

Is it difficult to remove the manifold? Doesthe turbo need to come off?
Rallly
Club Member
 
Posts: 185
Joined: Wed Jul 29, 2015 12:31 am

Re: Exhaust manifold leak symptoms

Postby r-town » Wed Jun 14, 2017 6:38 am

It's a bit difficult if you still have the stock downpipe. After removing the downpipe, the turbo and manifold come out as a single piece.
User avatar
r-town
Club Member
 
Posts: 189
Joined: Wed Jan 23, 2013 5:49 pm
Location: SoCal

Re: Exhaust manifold leak symptoms

Postby Rallly » Wed Jun 14, 2017 8:44 am

I have an after market dp. Isn't there any oil lines going to the turbo I need to remove? Will I need to have gaskets a d o rings on hand to replace them if I take oil lines off?
Rallly
Club Member
 
Posts: 185
Joined: Wed Jul 29, 2015 12:31 am

Re: Exhaust manifold leak symptoms

Postby underscore » Wed Jun 14, 2017 3:26 pm

There's a single connection for the oil in/out and a single connection for the water in/out. Replace the gaskets or you'll have headaches in the future.
★ 1991 GTFour RC ~ "Rebel Scum" ★
It's for sale! http://www.alltrac.net/phpBB2/viewtopic.php?f=64&t=52181
Build thread http://www.alltrac.net/phpBB2/viewtopic.php?f=44&t=44216
underscore
GTFour God
 
Posts: 3809
Images: 0
Joined: Mon Apr 09, 2007 11:29 pm
Location: Kelowna, BC

Re: Exhaust manifold leak symptoms

Postby Rallly » Wed Jun 14, 2017 4:29 pm

Can you send me a pic or part numbers for them plz?
Rallly
Club Member
 
Posts: 185
Joined: Wed Jul 29, 2015 12:31 am

Re: Exhaust manifold leak symptoms

Postby r-town » Thu Jun 15, 2017 7:23 pm

intake_exhaust.JPG

water_oil_gaskets.JPG
User avatar
r-town
Club Member
 
Posts: 189
Joined: Wed Jan 23, 2013 5:49 pm
Location: SoCal

Re: Exhaust manifold leak symptoms

Postby Rallly » Thu Jun 15, 2017 11:59 pm

So I would need the 2 water gaskets and the 2 oil gaskets?
Rallly
Club Member
 
Posts: 185
Joined: Wed Jul 29, 2015 12:31 am

Re: Exhaust manifold leak symptoms

Postby r-town » Fri Jun 16, 2017 4:41 am

one of each.
intake_exhaust_circled.JPG
User avatar
r-town
Club Member
 
Posts: 189
Joined: Wed Jan 23, 2013 5:49 pm
Location: SoCal

Re: Exhaust manifold leak symptoms

Postby Rallly » Fri Jun 16, 2017 8:36 am

r-town wrote:one of each.
intake_exhaust_circled.JPG



But the pic shows 3 highlighted? Are you certain I should just buy 1 of each?
Rallly
Club Member
 
Posts: 185
Joined: Wed Jul 29, 2015 12:31 am

Re: Exhaust manifold leak symptoms

Postby underscore » Fri Jun 16, 2017 3:35 pm

Yes, there's a plate on the on side of the turbo that has a gasket, but you won't have to remove it to remove the turbo.
★ 1991 GTFour RC ~ "Rebel Scum" ★
It's for sale! http://www.alltrac.net/phpBB2/viewtopic.php?f=64&t=52181
Build thread http://www.alltrac.net/phpBB2/viewtopic.php?f=44&t=44216
underscore
GTFour God
 
Posts: 3809
Images: 0
Joined: Mon Apr 09, 2007 11:29 pm
Location: Kelowna, BC

Re: Exhaust manifold leak symptoms

Postby Rallly » Fri Jun 16, 2017 6:26 pm

underscore wrote:Yes, there's a plate on the on side of the turbo that has a gasket, but you won't have to remove it to remove the turbo.



So just order 1 of each?
Rallly
Club Member
 
Posts: 185
Joined: Wed Jul 29, 2015 12:31 am

Re: Exhaust manifold leak symptoms

Postby Rallly » Fri Jun 30, 2017 9:47 pm

underscore wrote:Yes, there's a plate on the on side of the turbo that has a gasket, but you won't have to remove it to remove the turbo.



Okay I bought the 2 gaskets, now would it be easier to remove manifold all the way to do all in one peice or take everything off separately? I need to replace the 2 manifold gaskets (manifold to motor) and manifold to turbo. Any suggestions would be appreciated
Rallly
Club Member
 
Posts: 185
Joined: Wed Jul 29, 2015 12:31 am

Re: Exhaust manifold leak symptoms

Postby underscore » Fri Jun 30, 2017 10:19 pm

Remove the rad, unbolt the downpipe at the bottom and remove it as an assembly with the turbo and manifold, then disassemble them all on the ground.
★ 1991 GTFour RC ~ "Rebel Scum" ★
It's for sale! http://www.alltrac.net/phpBB2/viewtopic.php?f=64&t=52181
Build thread http://www.alltrac.net/phpBB2/viewtopic.php?f=44&t=44216
underscore
GTFour God
 
Posts: 3809
Images: 0
Joined: Mon Apr 09, 2007 11:29 pm
Location: Kelowna, BC

Next

Return to Performance and Power

Who is online

Users browsing this forum: No registered users and 2 guests