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  #21  
Old 02-13-2012
Don Meyer Don Meyer is offline
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David, you mention your need to replace exhaust manifold gaskets on your coach. Not sure if someone told you it's a 3 day job, but we've replaced them on several coach's during the past year. It really only takes a few hours to complete this job. In fact this week we're replacing those on the driver side of my coach. We always spray the nuts with PB Blaster a couple of times over a few days prior to removing. As a result we've never had to replace studs. And you do not have to remove the nuts completely. Simply back them off and the manifold will lift out and up. It's really not a difficult job. Once the heat blanket if you have it, is remove, you can get to some of the nuts from the top. Others you get from the bottom. When putting the manifold back on, be sure to be careful to have the bumps on the bottom of the manifold sit on the extended boss on the block. If you drop below that boss and tighten the manifold you WILL crack it, so look up from the bottom and make sure the manifold sits on those boss's.

By the way, if you do need to replace studs at some point, be sure to drain the coolant from the block. The studs go into the water jacket. And be sure to use some sealant on the studs.
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  #22  
Old 02-13-2012
oldfishhook oldfishhook is offline
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Default exhaust gasket replacement

Thanks for all the help !
I let you know how things go.

Dave
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  #23  
Old 02-24-2012
al perna al perna is offline
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hey guys , we were able to replace the curb side gaskt with little issue
the PORT side has not been the same
THE FRAME RAL HAS A BRACKET THAT IS IN THE WAY ??
QUESTION IS THERE A WAY TO GAIN ACCESS TO THE REAR BOLT WITHOUT LIFTING THE MOTOR
the last is not a option at this campground HELP!!!
THANKS
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  #24  
Old 02-25-2012
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Quote:
Originally Posted by al perna View Post
hey guys , we were able to replace the curb side gaskt with little issue
the PORT side has not been the same
THE FRAME RAL HAS A BRACKET THAT IS IN THE WAY ??
QUESTION IS THERE A WAY TO GAIN ACCESS TO THE REAR BOLT WITHOUT LIFTING THE MOTOR
the last is not a option at this campground HELP!!!
THANKS
Hi Al,

When I changed my driver's side exhaust manifold I removed the Hydraulic reservoir and its mounting bracket along with one of the brackets for the fan motor that’s behind the Hydraulic reservoir. That gave me pretty good access to all 5 of the studs for the exhaust manifold on the driver’s side.


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  #25  
Old 02-25-2012
Don Meyer Don Meyer is offline
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Al, you can get to most of the nuts from under the coach. Especially on the passenger side. On the driver side the last 3 towards the rear of the coach are not possible from under. The oil cooler and filter mount are in the way. You MUST get those from the top. Last Saturday we did exhaust gaskets on BOTH side of my coach. Had the job done in one day, including sand blasting and ceramic coating both manifolds and exhaust pipes going to the turbo. We removed the coolant tank and laid a blanket on top of the hydraulic tank. Then just laid across there to get to most of the hold down nuts. An 11/16 combo wrench works for the under side. A socket works form the top.
Also be sure to use a straight razor blade to clean all old gasket material from the head and the manifold. This project is a dirty job for sure. But it also gives you a chance to do some much needed cleaning in those areas.

And remember, if you're removing the studs from the heads, as we did, be sure to drain the coolant below the level of the heads. You will need three 5 gallon buckets for this.

If you need any assistance (or moral support) feel free to give me a call.
Don 603-283-8403
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  #26  
Old 02-25-2012
al perna al perna is offline
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John/ Don . Thank you both so much . Being in a campground with a check out date of this Tues i bailed on the project at this time . i just couldnt work around the fan bracket that is so clear to see in John sPicture . great Pic John . I didnotice that the leak was comming from the front were the manifold was cracked . so we used an apoxy and welded the crack and will hope it holds untill I can tackle the job in a area were we are prepared for any issues . I will save this post and go back to it prior to the replacement . I will tell you it was a bear to find the manifold used . i did and paid 250 $ for it used . so i recomend before you need one in your travels sours one thank you all for your help AL
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  #27  
Old 02-27-2012
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giderich giderich is offline
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Default Stewart & Stevenson CC, TX (361) 289-5350

John, thanks for posting the part numbers for the exhaust manifold gaskets, studs, washers, nuts and crabs. I may pull my manifolds this spring and change the compressor coolant hoses at the same time.

The manifolds are rather expensive and the fire from the 8V92 can destroy the casting quickly once a leak occurs.

I called Stewart & Stevenson this morning and a short 30 minute drive to Corpus Christi and I had the parts in hand. Nice men at the parts counter, indicated they always keep a pretty good stock of Detroit 92 Series parts.

http://www.stewartandstevenson.com/S...on.aspx?id=002

Quote:
Originally Posted by Dieselbird01 View Post
Hi David,

Right before the 2011 RATS Rally, my friend Mike Sprinkel ordered a set of manifolds for himself and a set of manifolds for me from Clarke Power Services, Inc. in Cincinnati, Ohio.

If you have an 8V92 and you’re going to be replacing the gaskets and studs on both sides of the engine you’ll need 4 gaskets, 10 studs, 10 nuts, 6 washers and 4 crabs.

Here are the Detroit Diesel part numbers:

Gasket – 05120224
Stud – 08925804
Nut – 23505398
Washer – 05104439
Crab - 05102735
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  #28  
Old 03-05-2012
oldfishhook oldfishhook is offline
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Default Compressor coolant hoses

Alright I have the passenger side exhaust manifold off and it was pitted so I checked every machine shop around here (Slidell Louisianna) to have it resurfaced. No luck so I bought a used one and have it in the mail.

I have the compressor coolant hoses off, the short one into the engine block busted right in half after I removed it. The long one is a metal flex hose and seems to be in fair shape.
I planned to replace them but now I am in a pickle no shop around here can make the hoses or have a clue where to go.


Does any one know where I can buy these hoses or tell me how to make them ??


I have some silicone hose that looks about the same size and the short hose appears to have barb fittings but the long hose has compressed metal fiitings on a metal hose.

Thanks

David
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  #29  
Old 03-09-2012
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giderich giderich is offline
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Default 8V92 coolant hoses and exhaust gaskets

Today I removed the curb side exhaust manifold and delivered the manifold to my machinist friend for resurfacing. Removal of the curb side exhaust manifold allows easy access to the lower coolant hose connection to the engine block. The manifold showed signs of leakage and now I will not have to remove the starter to change out the lower coolant hose.

Some pics showing the work in progress on the 1988 PT40 WB 8V92.

1) manifold leak 2) manifold & lower coolant hose @ block 3) manifold leak 4) manifold leak 5) upper coolant hose at compressor
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  #30  
Old 03-10-2012
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David Napa can make up the house for you or a heavey duty truck parts store.
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