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Farmall & IHC Tractors Discussion Forum

Re: New posting for 450 diesel # 1 cylinder leaking.

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11-19-2019 06:20:28

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don't have eye's on the project and don't know how and what was actually done. but yes a retorque is a must when hot. have u checked the sleeve stand out? must be the same throughout. guessing at a spec of .007 max. that is how the fire ring seals. pretty sure the head gasket is reuseable if you just put it on. but need to check it also. did you have the head magnafluxed and valves done? plus is block and head spotless clean and flat? plus is this an old problem or came up once assembled? if it was leaking like you say you would not keep the cap on it would basically blow the coolant out the overflow. requires a tear down and close inspection as the leaking spot will show. could also be a crack.

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pete 23

11-19-2019 13:29:56

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 Re: New posting for 450 diesel # 1 cylinder leaking. in reply to rustred, 11-19-2019 06:20:28  
I always retorqued after warming engine. Also, if you remove rockers, you need to run it a minute or two after adjusting the valve clearance as you will be sure to have one or two that change considerably.

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11-19-2019 13:25:51

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 Re: New posting for 450 diesel # 1 cylinder leaking. in reply to rustred, 11-19-2019 06:20:28  
If it is leaking out the head gasket how will I see that with close examination with head off? (Assuming the head gasket will prably still be intact)

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11-19-2019 07:12:51

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 Re: New posting for 450 diesel # 1 cylinder leaking. in reply to rustred, 11-19-2019 06:20:28  
It had been a problem on #1 for many years with low compression but I was certain it was the rings. (I put all new rings in). I thought the sleeve flange above head deck looked good. Does the gasket mainly seal on sleeve flange or does it also seal on block? (Referring to the ring on the gasket) also how much does the fire ring on the sleeve do?

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11-19-2019 19:24:38

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 Re: New posting for 450 diesel # 1 cylinder leaking. in reply to jhncp, 11-19-2019 07:12:51  
the fire ring is the most important part in the head gasket. it seals the combustion from the cyl's. plus the gasket has to seal the antifreeze between head and block, plus also has to seal the oil passages. so its function is sealing three things. so you want to buy a good gasket . you want surfaces spotless and FLAT. that is my explanation of the gasket. so have you checked the compression to know that it is low on #1 cyl.??? usually valves are more to do with a noticeable loss of compression . when u have the head off take the gasket and place it on the block and look things over to answer your question about the fire rings and sleeves. there is tell tale signs left behind of the leakages.

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