Matt
Out of curiosity, did you try running with no cooling system pressurisation? Since there is no evidence of combustion byproducts in the coolant, it sounds more like a manifold gasket leak. Running with stop leak and no system pressure may get you another trip out of coach before having to tear it apart.
As has been said. It might be risky to run it much longer, but that also depends on how high the oil contamination actually is.
Les Burt
Montreal
'75 Eleganza 26'
>
> Been there, done that Matt. I feel your pain. When we first got our 77, Blackstone said we had coolant in the oil. I did the stop leak and oil
> change thing and made another trip before a retest. Blackstone again said there was coolant in the oil and metals were up a bit. I had the oil
> tested by Chuck's guy who said, "Remove this engine from service, NOW!". I did and chose to pull it (out the bottom). Had a couple of bearings that
> were nearly to the copper and one that had a big gouge through it. My engine guy, John Beavers in Americus Ga, took one glance at my head and spotted
> the blown head gasket between 1-3. The head gasket came apart when I lifted the head but he could see the 'track' on the head.
>
> Because I caught it early we were able to do an 'overhaul' instead of a rebuild. The crank was within factory specs so it was polished. Cleaned up
> and new crosshatch on the block, did the heads, and back together with new gaskets. John ordered head gaskets from Mondello and block off plates from
> Paterson.
>
> Photos here: http://www.gmcmhphotos.com/photos/g6382-overhauling-the-403.html
>
> There is a long thread on the site somewhere.
> --
> Kerry Pinkerton - North Alabama
>
> Had 5 over the years. Still have the first a 76 that will be rebodied into an art deco car hauler.
>
> http://www.bdub.net/pinkerton/
>
> '03 Fleetwood Discovery 39L
>
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> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Out of curiosity, did you try running with no cooling system pressurisation? Since there is no evidence of combustion byproducts in the coolant, it sounds more like a manifold gasket leak. Running with stop leak and no system pressure may get you another trip out of coach before having to tear it apart.
As has been said. It might be risky to run it much longer, but that also depends on how high the oil contamination actually is.
Les Burt
Montreal
'75 Eleganza 26'
>
> Been there, done that Matt. I feel your pain. When we first got our 77, Blackstone said we had coolant in the oil. I did the stop leak and oil
> change thing and made another trip before a retest. Blackstone again said there was coolant in the oil and metals were up a bit. I had the oil
> tested by Chuck's guy who said, "Remove this engine from service, NOW!". I did and chose to pull it (out the bottom). Had a couple of bearings that
> were nearly to the copper and one that had a big gouge through it. My engine guy, John Beavers in Americus Ga, took one glance at my head and spotted
> the blown head gasket between 1-3. The head gasket came apart when I lifted the head but he could see the 'track' on the head.
>
> Because I caught it early we were able to do an 'overhaul' instead of a rebuild. The crank was within factory specs so it was polished. Cleaned up
> and new crosshatch on the block, did the heads, and back together with new gaskets. John ordered head gaskets from Mondello and block off plates from
> Paterson.
>
> Photos here: http://www.gmcmhphotos.com/photos/g6382-overhauling-the-403.html
>
> There is a long thread on the site somewhere.
> --
> Kerry Pinkerton - North Alabama
>
> Had 5 over the years. Still have the first a 76 that will be rebodied into an art deco car hauler.
>
> http://www.bdub.net/pinkerton/
>
> '03 Fleetwood Discovery 39L
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
