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Old 11-03-2020, 01:36 PM   #1
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2003 W22, 8.1 exhaust manifold gasket

Hello. I have a 2003 Winnebago Adventurer W22, 8.1L
The passenger side exhaust manifold gasket is leaking at the back cylinder. No bolts are missing.
I was wondering what labor hours I'm looking at a shop to replace the gasket if all goes well with removal of the studs and what should I expect to pay for removal of broken studs.
Thanks for your input in advance.
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Old 11-03-2020, 09:21 PM   #2
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I almost hesitate to answer here as it was so long ago, but I had 2 broken studs that came out very easily on one side. Thus no horrendous labor. It was 2007. But then for 2 new studs, gasket and labor I paid around 800.00.
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Old 11-03-2020, 09:32 PM   #3
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We had an exhaust manifold gasket replaced in our Workhorse W-24 a few years and the charge was about $600.00.
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Old 11-04-2020, 01:12 AM   #4
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Hello. I have a 2003 Winnebago Adventurer W22, 8.1L. ... The passenger side exhaust manifold gasket is leaking at the back cylinder. ... Thanks for your input in advance.

If you plan on driving your Winnebago a few more years, I would suggest doing away with the problematic/restrictive exhaust manifolds. Headers work much better on the 8.1L. A search will reveal lots of forum postings on headers, Banks System, etc. All the best.
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Old 11-04-2020, 10:44 AM   #5
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If you plan on driving your Winnebago a few more years, I would suggest doing away with the problematic/restrictive exhaust manifolds. Headers work much better on the 8.1L. A search will reveal lots of forum postings on headers, Banks System, etc. All the best.
I agree 10,000%. Have had exhaust manifold problems a couple times and if I had it to do over again I would have put headers on it the first time.
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Old 11-05-2020, 05:16 AM   #6
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Thank you very much for all your replies. I will make a decision soon as to which approach I will take. Fix it with headers or just replace the gasket.
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Old 11-05-2020, 08:55 AM   #7
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Took me about 5 hours to replace both sides on mine including new studs. I also had the gasket face machined ($40 each) flat. Depending on the labor rate I would guess in the $600-$800 range

I also filed or drilled out the mounting holes so there was no interference with the studs which is the primary cause of cracked manifolds and broken studs.

As for headers I have low floor and a tall engine cover. Headers are IMO, a little noisy and they radiate more heat near the engine.
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Old 11-06-2020, 06:58 AM   #8
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I had my driverís side done a few years ago. Labor was around $350. I provided new ARP studs, nuts and washers along with the few bolts that are use. I also provided a new gasket (GM) and some extremely high temp Permatex anto-seize for the studs.
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Old 11-24-2020, 12:55 PM   #9
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Originally Posted by gruelens View Post
If you plan on driving your Winnebago a few more years, I would suggest doing away with the problematic/restrictive exhaust manifolds. Headers work much better on the 8.1L. A search will reveal lots of forum postings on headers, Banks System, etc. All the best.
I agree. Our 2003 blew a exhaust gasket after loosing a bolt. I replaced the manifolds (not exhaust system)with Banks exhaust manifolds. Wham- sudden increase of power from 60-80mph - great for passing. Fantastic performance increase. No real mileage increase. I would recommend it instead of repairing a failing system.
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