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4000 3 cylinder gas

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Andy

11-13-2002 07:53:52




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Can anyone tell me if the 3 cylinder gas engines in the late 60s or early 70s 4000 Ford are any good. I heard that they have problems with the rods and pistons and pins. Is there any truth to this?
Thanks,
Andy




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DAVE M

11-13-2002 09:10:26




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 Re: 4000 3 cylinder gas in reply to Andy, 11-13-2002 07:53:52  
Our 1969 4000 gas has 4500+ hours on it and has
never been touched internally.



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Texadian

11-13-2002 08:13:42




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 Re: 4000 3 cylinder gas in reply to Andy, 11-13-2002 07:53:52  
There is no truth in that allegation and I don't know where it could possibly come from.

Here's the scoop - prior to 65, diesel engines were conversions of gas engines; for example, you'll occasionally hear of a broken crankshaft in a diesel 600 or 800 series. When they introduced the 2000 to 5000 family in 1965, Ford designed the engine from the gound up as a diesel engine. This meant the gas engine was a conversion of the diesel, the pistons, connecting rods, wristpins, crankshaft, block and head are far heavier than required for a gas engine.

There is a downside, the diesel engine uses a crossflow head (exhaust on one side, intake on the other); when using that design for the gas engine, there is no way to heat the intake manifold with exhaust gas so they used a water heated iontake manifold. There's not much heat till the coolant reaches operating temperature and the gas engine tends to be a little rough and hesitant till it warms up.

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matthew

11-15-2002 18:50:40




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 Re: Re: 4000 3 cylinder gas in reply to Texadian, 11-13-2002 08:13:42  
Texadian, my gas 4000 has a petcock type valve on the intake manafold. A heater hose that is attached to the valve connects to the top (I think) radiator hose via a tee in the radiator hose. I now have some understanding of this water circuit, but I do not know why a valve and how it should be set. I have an owners and repair manual. Neither mention this valve. When should this valve be open and when closed?

tks

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