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Engine Discussion of preventative/corrective maintenance and other technical issues regarding your coach's engine.

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  #11  
Old 04-19-2008
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Rob Robinson Rob Robinson is offline
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Quote:
Originally Posted by Randy Dupree View Post
one thing rob did not mention was i replaced all the studs and nuts that hold the manifold on,i got them at the detroit dealer,along with the gasket.
Randy

That reminds me of a picture I forgot to include. I spoke of making room by removal of the exhaust elbow and coolant pipe but as they say a picture is worth........
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  #12  
Old 04-20-2008
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Quote:
Originally Posted by Rob Robinson View Post
That reminds me of a picture I forgot to include. I spoke of making room by removal of the exhaust elbow and coolant pipe but as they say a picture is worth........

HMMMMM!!! It seems like we have seen that crack somewhere before, let's see could it be the..................

MAD PLUMBER!!!!!!



I hope you are feeling better Rob.
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  #13  
Old 04-20-2008
llhjunk
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Talking Plumber???

From the photo I would say he must have been up at the "crack" of dawn to get started!!! HeHe!!

The photo really "cracked" me up

Ok, that's enough...
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  #14  
Old 11-28-2010
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Smile Another Exhaust Manifold Repair 8V92

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Originally Posted by Rob Robinson View Post
I've been meaning to put a few pictures of an exhaust manifold repair done by Randy Dupree last year but haven't gotten around to until now. His drivers side manifold developed a leak due to gasket failure (see pics with screwdriver pointer) and upon removing the manifold it was discovered that the gases had burned a hole in the manifold face. Since the hole wasn't too deep he took the manifold to a buddies machine shop and had the face dressed up. Much cheaper solution. To gain access he loosened and slid the hydraulic reservoir down and removed some of the cooling system plumbing. At this time it was noted that the exhaust elbow coming out of the turbo had rusted through on the bottom so it was removed for repair. This made access even easier. One thing to be careful about though is the new gasket placement. There are indents it must rest in to seat properly. Be sure the gasket stays in place while re-installing manifold. If it doesn't and you tighten down the manifold it will crush and you'll be headed back to DD for a new one.
Chuck & Kathy Paschke spent Thanksgiving at our house and on Friday I helped Chuck replace a blown Exhaust Manifold Gasket set on the curb side of his Detroit 8V92, (1989 40 WB). Chuck had bought the Manifold gasket earlier and that was a good thing since the Detroit dealer was closed on Friday following turkey day.

Not too difficult a job and the PB Blaster and Mouse Milk combo helped free the self locking nuts on all five of those 7/16 manifold studs. Two of the studs came out of the head but we had drained the coolant so no problem.

Got started by 9:00 AM and by 11 o'clock the right hand manifold was delivered to Lyle the machinist who resurfaced the manifold on his Blanchard Grinder. Since the manifold has no bolt holes, it was difficult to hold the part for the grinding operation...but Lyle found a way to jig up the part and did a super job at a reasonable price.

We got 'same day' service on grinding the manifold and reinstallation was easier than the removal. Pouring the coolant back in the system was sorta slow and laborious since we lacked a pump, but went smoothly.

I took a few pictures and Chuck also may wish to post pics and his own story later.

Thanks to Randy and Rob for detailed instructions and pictures on how to change the right side 8V92 exhaust manifold gasket. Nice to use the WOG Forum as a reference...made the job easier. See pics below.

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Last edited by giderich; 11-28-2010 at 07:59 AM. Reason: Added pic
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  #15  
Old 11-28-2010
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Nice follow-up photos Dick. From the pic it sure looks obvious where the leak is. If there isn't any obvious black soot you can also feel exhaust gases with your hand. Just be careful to keep them away from moving parts.
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  #16  
Old 11-28-2010
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This leak on the 8V92 right side exhaust manifold was not in it's infancy...also fixed two leaky turbo V clamps.

I rode shotgun with Chuck on a shake down cruise after the new gasket install...turbo boost is much improved and the reduction of engine compartment heat will be measureable.

Chuck is pulling one of the Suburban propane heaters this morning and the unit will be 'good as new' after receiving cleaning and adjustments learned from the recent Shane Furnace Seminar.
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Rolla, MO 65401
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  #17  
Old 11-28-2010
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Quote:
Originally Posted by giderich View Post
This leak on the 8V92 right side exhaust manifold was not in it's infancy...also fixed two leaky turbo V clamps.

I rode shotgun with Chuck on a shake down cruise after the new gasket install...turbo boost is much improved and the reduction of engine compartment heat will be measureable.

Chuck is pulling one of the Suburban propane heaters this morning and the unit will be 'good as new' after receiving cleaning and adjustments learned from the recent Shane Furnace Seminar.
Good write up Dick. Don't forget the 1/8 and 1/4 drill bits for the Suburban. That Shane is OK.
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  #18  
Old 11-28-2010
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Chuck should have no problem with that propane heater. He was key in getting Leftys fixed at Hershey after the repair had stumped the chumps!LOL
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  #19  
Old 11-28-2010
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Any links to said Suburban Propane Heater tweeks? Need to pull ours in the next few days and see why it won't kick on.
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  #20  
Old 11-29-2010
Dctrcarter Dctrcarter is offline
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Hi all, had my exhaust manifolds replaced last year in Hudson,Fl. all parts from DD, an now see small hole in my exhaust pipe at the point you'al are talking about. ? is can you cut that piece out an weld the 90 in place. Mind vents up also, ? is this where the muffler is also going up with the pipe.
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