7.3 exhaust manifold gasket leak/replacement??? - Diesel Forum - TheDieselStop.com
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Power Strokes 1994-1997 General Technical discussion of topics related to vehicles powered by the Power Stroke engine in 1994 through 1997 models.

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Old 09-30-2006, 06:19 PM   #1 (permalink)
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7.3 exhaust manifold gasket leak/replacement???

I have a 95 7.3 in a f450 2wd I just got done putting a new stock turbo on it and noticed the exhaust manifols had leaks on both rear cylinders.After I installed the new turbo it seems to be lacking the power that it use to have,and I can hear the exhaust leak getting louder and louder under a load pulling a trailer.Will I have to pull the engine to change the gaskets?Also wondering if the bolts on these come out easy or break off like common ford motors in the past?would these leaks cause a noticable power loss?thanks for any info
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Old 09-30-2006, 07:40 PM   #2 (permalink)
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Re: 7.3 exhaust manifold gasket leak/replacement???

When the motor was originally assembled at the factory they didn't use manifold gaskets, but they are available.

The manifolds can be removed without pulling the engine. The inner fender can be loosened up and pulled out of the way so you can work thru the wheelwells.

Any exhaust that is leaking before the turbo will cause a loose of power because that exhaust is being wasted instead of being used to spool the turbo and build power.

And yes these manifols bolts like to break off in the head. As a matter of fact that could be the source of your leak, is fairly common for them to break even before you get near them with a wrench.
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Old 09-30-2006, 09:51 PM   #3 (permalink)
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Re: 7.3 exhaust manifold gasket leak/replacement???

Here's the factory gasket part numbers (as was mentioned there are no gaskets on them from the factory):

Exhaust Manifold Gasket
(Ford) F4TZ-9448-A
(International) 1814219C1

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Old 10-01-2006, 07:15 AM   #4 (permalink)
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Re: 7.3 exhaust manifold gasket leak/replacement???

i'm having the same problem, but its just on my drivers side. How do you remove broke bolts? I don't know if any of mine are broke, but i want to be prepaired before starting the project of fixing it. Also should i buy all new bolts?
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Old 10-01-2006, 09:27 AM   #5 (permalink)
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Re: 7.3 exhaust manifold gasket leak/replacement???

[ QUOTE ]
When the motor was originally assembled at the factory they didn't use manifold gaskets, but they are available.

[/ QUOTE ]

Are you sure about that? The ones I have seen have stainless steel stamped gaskets OE. Maybe they changed somewhere along the line?

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Old 10-01-2006, 12:05 PM   #6 (permalink)
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Re: 7.3 exhaust manifold gasket leak/replacement???

Yep, never has gaskets from the factory.
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Old 04-24-2014, 02:57 PM   #7 (permalink)
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Time for me to pull the manifolds and install gaskets too. Are there any "while you are in there" suggestions you guys recommend? I'm thinking maybe the up/down pipe gaskets at the same time?
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