C123 engine head gasket

jdal · Oct 7, 2014

Posting for a friend, I usually hang out on the green forum. My friend is having problems getting the head gasket not to leak coolant on a C123 combine engine. He's had the head milled, tried adding block sealer and 2 new gaskets, any suggestions?

Harry Klever · Oct 7, 2014

I had trouble that way with my 123 engine also, but i had visible cavitation on top of the block,so i had it to have it decked. If your friend has it decked, make sure he has a very competent machinist do it !

johnald · Oct 7, 2014

just went through this. the manual said 45lbs. torque but it needs to be higher. I can't remember off the top of my head 65 maybe. Google the torque for tractors using that engine, 130, 140 and that should come up with the correct torque.

mkirsch · Oct 8, 2014

If I'm not mistaken the original torque is 65 ft-lbs, but it was raised to 80 ft-lbs.

At 45 ft-lbs no wonder it's leaking!

johnald · Oct 8, 2014

(quoted from post at 05:40:56 10/08/14) If I'm not mistaken the original torque is 65 ft-lbs, but it was raised to 80 ft-lbs.

At 45 ft-lbs no wonder it's leaking!

You're correct. Couldn't remember exact numbers. It will definately leek at 65. 80 got the job done.

Nawlens Gator · Oct 8, 2014

Replaced a head gasket on a 123 engine and went to 85 lb on the head bolts. The torque is higher in later manuals. I had no problem.

Harry Klever · Oct 9, 2014

Is your friend more confused now then ever ? I am real curious what combine this engine is on? My dad bought a new NO.64 IHC combine in 1953, That i think had the 123 engine, all i remember is that it could manhandle that job. Let us know what he eventually figures out!!!

C123 engine head gasket

jdal

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Nawlens Gator

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