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Unread 10-11-2001, 04:06 AM   #1
HJ
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Join Date: Sep 2001
Location: Wirral
Posts: 19
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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Unread 10-11-2001, 10:31 AM   #2
bonehead99
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1994 YJ Wrangler 
 
Join Date: Jun 2001
Location: T Town, Ohio
Posts: 286
My manifold also cracked, I replaced it with a Pacesetter Armor-Coated Header for $300.00
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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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Unread 10-11-2001, 09:12 PM   #3
Nightclaw
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1994 YJ Wrangler 
 
Join Date: Jul 2001
Location: Oceanside, CA, USA
Posts: 150
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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[b]'94 YJ Sahara Hardtop[/b]
4.0L / AX-15 / Stock NP231 / Stock D30 (open) / D60 (35-spline, Detroit locker, Moser axles) / rear disc brakes / 4.56 gears / Advanced Adapters SYE & CV Shaft / 33" BFG MT-KM's / Thorley Header / Magnaflow Muffler / BesTop Flares
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Unread 10-30-2001, 12:47 AM   #4
HJ
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Join Date: Sep 2001
Location: Wirral
Posts: 19
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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