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03-10-2008, 08:33 PM | #1 |
Senoir Member
Join Date: Mar 2002
Location: Rock Hill, SC USA
Posts: 1,214
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Another exhaust question
I finally got the 2 1/2" stainless pipes and 50 series delta flowmasters on the 402. I have the original cast mainfolds that are 2 1/2" outlet, and the heat riser valve on the passenger side (it opens and closes by hand). The truck runs & sounds great.
My question is...The tailpipe on the driver side is noticeably hotter than the passenger side, is this normal? I did not notice this with the last system. Maybe the heat riser valve is not opening when it gets hot, I have not checked that. Thanks
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67 Chevy, Small back glass, Factory 4WD, Factory Shortbed, Factory V8, Lifted 4" 70 GMC Sierra Grande, Factory Shortbed, Factory 402/400 turbo, Super Custom Interior. Numbers matching with SPID & Build Sheet. 68K Original Miles. Restored 2010 70 GMC Restoration Pictures http://67-72chevytrucks.com/gallery/...00&ppuser=4424 |
03-10-2008, 08:36 PM | #2 |
Registered User
Join Date: Feb 2006
Location: San Diego
Posts: 631
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Re: Another exhaust question
I would take that riser out.
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03-20-2008, 07:56 PM | #3 |
Senoir Member
Join Date: Mar 2002
Location: Rock Hill, SC USA
Posts: 1,214
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Re: Another exhaust question
Just in case anyone searches this...My heat riser valve worked properly by hand when cold. But, when it was hot it was stuck closed. I tie wired it open, you can't really see the wire and it looks original. Both sides heat up the same now and it runs btter & smoother. Didn't really notice it running funny since everything is new and it's been about 16 months with the resto. Greg
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67 Chevy, Small back glass, Factory 4WD, Factory Shortbed, Factory V8, Lifted 4" 70 GMC Sierra Grande, Factory Shortbed, Factory 402/400 turbo, Super Custom Interior. Numbers matching with SPID & Build Sheet. 68K Original Miles. Restored 2010 70 GMC Restoration Pictures http://67-72chevytrucks.com/gallery/...00&ppuser=4424 Last edited by gregbr; 03-20-2008 at 07:58 PM. |
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