Why Check for exhaust cracks? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Forced Induction All questions and problems regarding Superchargers, Turbos, NOS, ZEX, intercoolers, water injection, etc.

Reply
 
 
 
Thread Tools Search this Thread
Old 03-20-2007, 02:03 AM   #1
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Feb 2007
Location: Chicago
Posts: 99
Thanks: 0
Thanked 0 Times in 0 Posts
bandit01 is on a distinguished road
Default Why Check for exhaust cracks?

When changing to a smaller pulley? List some of the problems this cause. thanks

1996 ssei.
bandit01 is offline   Reply With Quote
Old 03-20-2007, 02:04 AM   #2
Junior Member
 
Join Date: Aug 2005
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
wjcollier07 is on a distinguished road
Default

Knock Resistance

Retards Timing

Reduces Power

Not good.
wjcollier07 is offline   Reply With Quote
Old 03-20-2007, 02:26 AM   #3
Senior Member
True Car Nut
 
Join Date: Dec 2002
Location: Sauk Centre, MN
Posts: 5,458
Thanks: 0
Thanked 0 Times in 0 Posts
OLBlueEyesBonne is on a distinguished road
Default

Cracked exhaust manifolds can cause a lean condition which can ruin an engine.
Make sure the exhaust manifold gaskets aren't leaking.... you should be able to hear when the cylinder nearest the leak (if any) fires.

Also look for big cracks in the flex section of the downpipe -mine is VERY obvious..... feels like about 10* KR and that'* with very light throttle. At least my transmission feels awesome!!! Mine is probably cracked from when I had my motor swapped -I suspect there was not much care put into installing the motor, hense the cracked DP, leaking trans, and damaged passenger side CV axle (boot clamp was completely gone, no damage to the boot, but the axle was SHOT).
OLBlueEyesBonne is offline   Reply With Quote
Old 03-20-2007, 08:52 AM   #4
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

Bandit.. Series 2 aren't known for cracking exhaust manifolds like series 1'* do. It is always a good idea to check though. As well, fuel pressure and check for KR before and after adding a pulley (only add if at 0KR). Upgrade or fix all items that can cause KR and you'll be much happier with the performance of the car and will reduce the risk of damaging the engine.
BillBoost37 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Holy exhaust manifold, cracks, Batman! (FINISHED!) willwren Performance, Brainstorming & Tuning 26 06-03-2006 01:20 PM
Paint Chipping / Cracks in body stb4224 Detailing & Appearance 7 02-21-2006 12:53 PM
Just cleaned and treated my leather, found 2 cracks.... maxguitarhero Detailing & Appearance 0 03-22-2005 10:18 PM
removing wax from cracks and crevices John Deere Boy Detailing & Appearance 11 06-15-2004 03:31 AM
Firewall cracks ?? Dylansdad 1992-1999 5 03-06-2003 05:24 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -4. The time now is 08:15 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.