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Leaded gasoline

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Kevin Kluger

07-28-2002 07:36:53




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Does my 1949 Allis Chalmers WD require an additive
to the unleaded gasoline I've been burning to
prevent engine damage?




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Steve in N.J.

07-29-2002 14:27:50




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 Re: Leaded gasoline in reply to Kevin Kluger, 07-28-2002 07:36:53  
Kevin,
As Trent & Don said, a lot of machine shops and engine builders update the valve seats in older car, truck, & tractor engines to handle some of the troubles that unleaded fuel brings over time. Engines are like people, they're all different, from one another and run differently from one to the next, and in Jim's case, that miss could be caused by a number of things, but hey, if the additive seems to work in his tractor engine, ya toss it in. That miss could be as simple as a little carbon build-up under one of the valve seats and once the tractor starts to work and labor the carbon breaks loose and the miss is gone. When I had the head done on my B, I had the hardened seats and swirl polished valves installed. Is it an advantage? Who knows..... If it starts to miss some day, maybe I'll throw a can of that additive in and try it! What the heck!
Steve

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David

07-28-2002 15:08:18




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 Re: Leaded gasoline in reply to Kevin Kluger, 07-28-2002 07:36:53  
Don't worry about it. It's been found that the valve seat wear with unleaded gasoline is not nearly as much of a problem as first thought. In the event that the seats do wear you will probably need to do other work on the engine and put seats in then.



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Trent Williams

07-28-2002 14:47:57




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 Re: Leaded gasoline in reply to Kevin Kluger, 07-28-2002 07:36:53  
The guy that worked on my head said, "I'll put hardened seats in it so you can run unleaded" ???



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Diesel Don

07-28-2002 19:55:01




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 Re: Re: Leaded gasoline in reply to Trent Williams, 07-28-2002 14:47:57  
I just had the head done for my '34 Chev truck.There was a crack through #2 exhaust valve seat and after the crack was repaired,they needed to install an insert in that position.The shop and I decided to do them all because once the machine is set up,it is simple to move on and do them all.Had I not needed to do the welding job,I would have run with the original seats.I haven't had any problems with any old engines I run on unleaded fuel.In the case of my old truck,it was cheap insurance because parts are very difficult to find for it.

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Bill Hires

07-28-2002 13:53:46




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 Re: Leaded gasoline in reply to Kevin Kluger, 07-28-2002 07:36:53  
NO! Unleaded fuel will not damage any gasoline tractor engine! Lead additives are a waste of money, use the unleaded fuel! Modern gasoline has all the advantages of leaded fuel and more.



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