Author Topic: 8v92 Exhuast Manifold parts number  (Read 2036 times)

Offline Kmon

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8v92 Exhuast Manifold parts number
« on: January 17, 2013, 02:23:43 PM »
Hey all,

I have a 1989 MCI 102A3 with a non-ddec 8v92 that needs new exhaust manifolds(mine are starting to leak).  My manual skips from section 7 to 9...8 being the engine parts listing.   Does anyone know the parts numbers, and maybe a supplier for a take off set?

Detroit Diesel wants to hold on to theirs for the prices they are asking!! lol

Thanks,

Keith
1989 MCI 102A3
8V92

Offline robertglines1

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Re: 8v92 Exhuast Manifold parts number
« Reply #1 on: January 17, 2013, 04:26:39 PM »
Are they cracked?  Or just need new gaskets/under $20. They sit on a lip on bottom so make sure they are in place before final bolt-up.
« Last Edit: January 17, 2013, 04:34:13 PM by robertglines1 »
Bob@Judy  98 XLE prevost with 3 slides --Home done---last one! SW INdiana

Offline Don Fairchild

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Re: 8v92 Exhuast Manifold parts number
« Reply #2 on: January 18, 2013, 08:40:52 AM »
Keith, as bob said they probably only need new gaskets, if not send me a pic of which ones you have I have a few sets I can sell.
I am in central cal
Don

sales@cctskit.com

Offline Kmon

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Re: 8v92 Exhuast Manifold parts number
« Reply #3 on: January 18, 2013, 01:48:08 PM »

Thanks for the replys,

I will take some pics this weekend and send them over.  They are both leaking from the topside.  I did not see any cracks......may in fact just be gaskets, but the manifolds are pretty rusty, so it's hard to tell.   

Keith

1989 MCI 102A3
8V92

Offline robertglines1

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Re: 8v92 Exhuast Manifold parts number
« Reply #4 on: January 18, 2013, 02:21:38 PM »
rusty normal,prob gaskets 99% .studs go into water jackets so if you take out you will drain system.  Most nuts are frozen on studs.  would just plan on them coming out.  Remember what I said about ledge manifold sits on bottom.  Don't force them tight.  If your real quick and have new studs you can switch without draining your whole system.  You will see what I mean when you take a look at them.  Not all go thru manifold.  Have catch pan ready-big one.  If I remember rite 17 gal in system.   Will pick your turbo pressure up a bunch and power.   Bob
« Last Edit: January 18, 2013, 02:38:56 PM by robertglines1 »
Bob@Judy  98 XLE prevost with 3 slides --Home done---last one! SW INdiana

Offline Kmon

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Re: 8v92 Exhuast Manifold parts number
« Reply #5 on: January 18, 2013, 02:27:04 PM »
Robert,

Thanks for the heads up on the studs, I really hope its just the gaskets...and you are right...power has been wayyyy down.  I'm heading out of town for the weekend, hopefully will be able to take a look on Monday. 

Keith
1989 MCI 102A3
8V92

Offline robertglines1

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Re: 8v92 Exhuast Manifold parts number
« Reply #6 on: January 18, 2013, 02:32:51 PM »
low exhaust pressure =low boost.   mine dropped  8mph with one leak.  On the 89 prevost 8-V92
Bob@Judy  98 XLE prevost with 3 slides --Home done---last one! SW INdiana