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Dual exhaust on oliver rc 70

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ron bleess

02-03-2001 20:49:46




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I recently purchased an oliver, 1943 or 1944 that was restored about 5 years ago but was not ran much after the restoration due to the health of the owner. The front seal leaks due to lack of use,I aasume. How big of job is it to replace the front seal. Also ,this tractor now has dual exhaust, did any oliver come stock that way or is this an after market modification?




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MCL in IN

02-06-2001 12:24:50




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 Re: dual exhaust on oliver rc 70 in reply to ron bleess, 02-03-2001 20:49:46  
The manifold has 2 outlets. The factory muffler laid on top of the manifold connecting the outlets together. The exhaust pipe then came out the rear hole. When the muffler rusted out a lot of these tractors were done this way. I had one like that. I also heard some of the "old timers" (no disrespect intended) say that the exhaust setup created a lot of heat and contributed to burning exhaust valves and by running the two pipes they would run a little cooler. I don't know if that is true or not. Your manifold isn't necessarily shot. Maybe or maybe not.

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Jerry

02-18-2001 16:13:12




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 Re: Re: dual exhaust on oliver rc 70 in reply to MCL in IN, 02-06-2001 12:24:50  
A fellow installed two exhaust pipes many years ago when the 70 was his big tractor. It was for the purpose of running cooler and making the valves last longer.



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Scott Green

02-07-2001 02:28:34




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 Re: Re: dual exhaust on oliver rc 70 in reply to MCL in IN, 02-06-2001 12:24:50  
Yes MCL in IN , your very accurate on your posting. I've also herd the same sayings you have about the heat build up. I've had two heads crack on my Oliver "70" tractors. I assumed that was due to heat build up. The tractor would boil over with out even working it. Cross over components of the exaust manifold would crack and deteriorate. Those parts were not available for years , which titled the exaust manifolds , shot. The Oliver dealers had waiting list for complete used manifold set ups for the old "70" tractors. Every now and then , one would come along. We were on the list , as well as many others.Even if a person was able to find salvageable cross over castings , a lot of times the other part would be ruined while attempting to install the cross over parts. These manifolds were cobbed in many ways , just to keep the old tractors going. Most likely , what is left of the exaust part of the manifold is in rough shape also. The two pipes coming up through the hood was never seen until people started buying up the old "70's" for pulling. That was the only choice they had. If the tractor was used for actual work , I'm sure that would also be short lived.

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Scott Green

02-04-2001 04:39:08




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 Re: dual exhaust on oliver rc 70 in reply to ron bleess, 02-03-2001 20:49:46  
Your exaust manifold is shot. You can now buy new complete manifold sets for around $400.00. It is supposed to cross over into one , under the hood.



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