Manifold on YJ's -
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post #1 of 4 Old 10-11-2001, 04:06 AM Thread Starter
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Manifold on YJ's

I heard that it was a common fault to get a hairline crack at the manifold and so looked carefully to discover that there is a smear of exhaust sealant already present! Hmmm Apparently the manifold is steel tube and not cast iron so the best repair is to weld strengthen the original (as I also hear that a new part can be as expensive as £400 - and just as likely to fail.
Anyone had any experience of this?

Best wishes - Hwfa

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post #2 of 4 Old 10-11-2001, 10:31 AM
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1994 YJ Wrangler 
Join Date: Jun 2001
Location: T Town, Ohio
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My manifold also cracked, I replaced it with a Pacesetter Armor-Coated Header for $300.00

94 YJ 4.0 HO 3sp Auto, 3" RC Lift, 1" Shackles, 3" BL, 31x10.50, Pacesetter Armor-Coated Header, Homemade Air Intake w/ K&N
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post #3 of 4 Old 10-11-2001, 09:12 PM
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1994 YJ Wrangler 
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Location: Oceanside, CA, USA
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I also got the hairline crack in my manifold. Or rather, the Jeep had it when I bought it, and it took me two months to really hear it.

Replaced with a Doug Thorley header (P/N 634Y), and have had no problems with the Thorley's material quality.
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post #4 of 4 Old 10-30-2001, 12:47 AM Thread Starter
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Thanks for the advice folks - After consideration I decided to weld up the hairline crack in my exhaust, strengthening it at the same time. - there was room to do it I did it in situ. Seems fine
Best wishes

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