Perkins appears to be leaking at head gasket

young tractor · Jan 20, 2019

Hi guys. I got all the seals and axle bearings done with my 1850. Thanks for the advice on just replacing the injector line with a used one. That worked great. I was running it up and down the gravel road today to make sure everything I repaired seemed right. I noticed what seemed to be oil leaking at the head gasket. I cleaned everything up real good to make sure it wasn?t the valve cover gasket or manifolds. It appears to be leaking at the head gasket. It smelled like oil to me. I almost slowed to a stop once the motor warmed up as far as it could at a high of zero. My question is how could oil be at the head gasket. Would retorquing the head be of any help. Am I looking at putting in a new head gasket. This motor was majored before I got it by a former Oliver implement dealer mechanic. I know who he is and does great work. I just got it this fall and only used it for pulling gravity boxes. I hasn?t really done much work since the overhaul, but that was done 10 years ago. What do you guys recommend I do from here. It?s weird that it pretty much stopped once I ran it for a while. I appreciate your advice. Thanks Jeremy

Dieseltech · Jan 20, 2019

A hot re-torque might help, probably seeping near a push rod hole.

young tractor · Jan 20, 2019

Kinda sucks I have to pull the fuel tank. Does anyone know by chance what the torque should be on the head bolts?

young tractor · Jan 20, 2019

Would you run it like this for a summer and see what it does or would you put in a head gasket. I pull a six row planter in the spring

Dieseltech · Jan 20, 2019

It would have to be leaking really bad before I'd pull the head.

2-stroke DD · Jan 20, 2019

Since your inj. Line was leaking it could just be fuel mixed with oil and dirt boiling out of the space between the head and block and or the space between the inj.and head. I've seen this happen many times after a fuel or oil leak . You may be lucky and that is it. Like was said earlier I would not pull the head unless there is really a bad leak.

JD Seller · Jan 20, 2019

Every Perkins of that vintage I have seen will have some oil or fuel leaks on it. You can get them all stopped and run it and new leaks will show up.

young tractor · Jan 20, 2019

I?m going to try tomorrow to get it as close as I can to operating temp and retorque. The book says 80-85 lbs for diesels. That seems low. Is that right?

young tractor · Jan 20, 2019

Thanks guys for all your replies. I guess it?s possible to be boiling out diesel from the leaky injector. The only thing I can?t wrap my head around is the leak in on the other side of the motor.

J. Schwiebert · Jan 20, 2019

You need some pointers! You do NOT need to remove the tank to retorque the head! Send me an e-mail. I have a doctor's appointment but will call you sometime in evening. J.

Agco-iron · Jan 21, 2019

There is a single oil lube port going through the headgasket on these engine and is supplied from a cam journal. Perkins actually recommended in my manual to put a bead of sealant around the head studs on r/h side of the engine (cam side) specifically to prevent oil leaks caused by the valve train loading. Myself id pull the head and replace the gasket since it now has oil contamination between the sealing surfaces.

oliver90owner · Jan 22, 2019

My first question would be ?Has it been retorqued already, after the first running of the engine to operating temperature??

If it hasn?t been tightened down correctly, it sure would. Doubt it would make much difference if already done to specs.

Perkins appears to be leaking at head gasket

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