Farmall 560D backfire,smoke,oil ?!?

165Massey

Member
I have posted a few times on this tractor and am scratching my head and confused. I was running good and through all your help determined it was “wet stacking”. Ran for awhile and it went away. Got it out the last cutting of hay to use and it ran great until I got home. It started to run rough almost like it had a pulling cam. Started to smoke and really blow out out the exhaust. I decided to do a compression test and had 300psi on cylinder 1 and less than 100 on 2 so I stopped there and decided to pull the head and see if I had a problem with the rings. I have it apart and have found nothing but cylinder 2 exhaust valve to be very oily. I’ve attached picture. Everything looks normal. Going to have a local machine shop go through the head and see if I have a bent or sticking valve or gas valve guides. Can a worn out guide cause a backfire sound ? I know it can cause the oil I’m seeing if it’s bad enough. I think the rings are ok since theee was no fuel in the oil.
 

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By the picture it looks like a crack in the head right by the exhaust valve going away from the valve. It could also be just a scratch in the carbon on the head .
 
How can everything look normal when u did not pull the valves out to see if they are seating???
And it can also be the head gasket burnt between 2 cylinders. Funny u didn’t complete the compression test , as that would have showed up , why do half a job ? And post the complete head picture as a person can see that also where it’s leaking if that’s what happened.
 
And it can also be the head gasket burnt between 2 cylinders. Funny u didn’t complete the compression test , as that would have showed up , why do half a job ? And post the complete head picture as a person can see that also where it’s leaking if that’s what happened.
And as for the oil , u tell us how much oil the engine uses . That will answer your ring question. And as for guides. That’s a diesel engine and they don’t wear out like a gas engine. The more the guide is worn the wider the seat gets which will and can cause lower compression , I am sure u have a head gasket problem. Show the complete head gasket. I have seen lots burn out between the cylinders. It will need a head planning also. So u basically have a 1K head repair job to do it all properly.
 
It’s not rust it’s that copper gasket spray stuff. The head was obviously off at some point recently before I got it. I did pull the valves on cylinder 2 and nothing jumped out at me. I’m not an expert or I wouldn’t be posting it on here. Did you miss the part about having it looked at by a local machine shop ? I’m asking opinions not criticizing I attached pictures of both sides of the gasket
 

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Caterpillar guy. I think what you see is from when I was pulling my valve spring compression tool on to pull that valve. I will know when the machine shop crack checks it
 
I ask for information to give a profession answer. And without information it’s all guessing. I don’t have eyes on the subject which will tell u the same thing a head rebuilder would. The head gasket is not burnt between 2 cylinder that I can see. Got to keep digging and look at the valves.plus they will soak the head then check it for cracks first thing before proceeding. I got lots of experience on the engines. Maybe more than some machine shops.
 
And in that picture of that cylinder , no idea which one it is from your photo, looks really dry.and you had to loosen each injector line to actually find out which cylinder is giving the problem. It’s diagnose before u tear an engine down. The intake valve looks really recessed also. And that liner looks like it was improperly honed. Just like someone was in this engine not long ago. Kinda surprised it looks like the good victor head gasket. These felpro gskets are garbage and that all that available. Be nice to see all the cylinders and not worry about getting a close shot of one as a person can zoom in on the photo. Everything tells a story.
 
I have said multiple times I think this was just done. I tore it down to see what all I was dealing with myself and. It just guessing. I’m getting ready to paint this tractor and don’t want to tear it apart again. No idea what oil was being ran or if was even right honing looks terrible to me. Injectors and flow plugs are supposedly new I believe it of the glow plugs because I had them all out and they look new. I stopped at cylinder 2 because if theeea a problem there’s a problem don’t need to keep investigating your tearing it down anyway. Ordered new rings and will pull pistons this week and rehone the right way. Put new rings on and wait for head to come back from machine shop
 
cranking it over with the valve cover off everything looked normal and all pushrods are straight. I only took out the exhaust valve on cyl. 2 that spring looked good. Machine shop will check the rest
 
A broken spring can be hard to see if only one coil is broke & can cause some of your symptoms.

Also inspect the rockers for cracks or breaks.
 

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