Exhaust Manifold Leak is a definite - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 49 (permalink) Old 04-27-2010, 09:15 PM Thread Starter
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Exhaust Manifold Leak is a definite

It did turn out that I'm slowly leaking oil out the exhaust manifold. Anyone ever see or hear of or know about this problem?

90' 1 Ton Dodge Diesel 4x4 Stock 12v. 5-speed Getrag. Custom 6'' Alcan Springs. 35'' Toyos.

2002 Dodge 2500 Cummins Automatic Stock.
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post #2 of 49 (permalink) Old 04-28-2010, 01:45 AM
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exhaust valve guide and or seal..... time to do some head work....good time for port and polish.....maby some o rings


ask NukleusX, he had similar problems. just with a p-pump motor

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post #3 of 49 (permalink) Old 04-28-2010, 06:47 AM Thread Starter
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Is that some pretty labor intensive work?

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post #4 of 49 (permalink) Old 04-28-2010, 10:55 AM
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pull the head and strip it down and take it to a shop to press the guides out and press new ones in...... i wana say it was like $150-$180 last time i had one done plus
the parts are cheap.

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post #5 of 49 (permalink) Old 04-28-2010, 04:42 PM Thread Starter
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Dont you have to pull quite a bit off as well, not just as simple as it sounds although it may as well be simple. I'll take a look at my diesel supplement see how it goes.

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post #6 of 49 (permalink) Old 04-28-2010, 05:09 PM
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I just paid around $350 to surface the head, do a valve job, and cut it for fire rings. I will be pulling my head soon and can document the whole thing if you would like. It definitely sounds like you have bad valve seals, or worn valve guides.

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post #7 of 49 (permalink) Old 04-28-2010, 05:18 PM
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Quote:
Originally Posted by floridaboy View Post
exhaust valve guide and or seal..... time to do some head work....good time for port and polish.....maby some o rings


ask NukleusX, he had similar problems. just with a p-pump motor
dont ask Nuk, he never addressed that problem.

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oh well, i have a map to the darkside

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post #8 of 49 (permalink) Old 04-28-2010, 08:08 PM
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ha never mind.

pulling the head and stripping it down is easy, then you take all your rockers and springs off, drop the valves out and clean it all up....then take it to the machine shop and they do the rest of the work... then just put it back together and slap it back on....

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post #9 of 49 (permalink) Old 04-28-2010, 10:08 PM
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To get oil to flow out the exhaust guides they would really have to be bad and when you remove the valve cover there would be a lot of carbon. The exhaust side is under preasure 99.9% of the time. Before I pull the head I would do a cylinder leak down test, to see if you have a bad cylinder. If you pull the head and there is a ring about 1/2 inch, clean, and wet on the piston top it is a broken ring or bad cylinder problem. Just a thought!

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post #10 of 49 (permalink) Old 04-29-2010, 10:09 PM Thread Starter
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Thanks guys. Yeah I'd love to read your write up, my rear axle seals just started doing that so I can do that in the mean time. The manifolds been leaking for a few months now.

These valve seals or guides do they just press in?

Dumb question but is the machining critical. I mean after measuring everything. I have a diesel supplement so that helps as well as talking to you guys.

Also anyone have a cylinder head weight?

90' 1 Ton Dodge Diesel 4x4 Stock 12v. 5-speed Getrag. Custom 6'' Alcan Springs. 35'' Toyos.

2002 Dodge 2500 Cummins Automatic Stock.
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