FORD 1700 NEW HEAD INSTALLED

[geozeitl]

Good afternoon, had my head sent out to be welded due to cracks around the combustion chamber. looked real nice when I got it back . I installed it with the service manual so it should be right. Also added two new exhaust valves because the old ones were badly pitted. Had all valves reground. After install I got it started and let it warm up. put it in 1st gear and drove it out of the shed. Noticed it seemed to lack power, like it wanted to die, I let it idle for a bit longer and it seemed to get better. I raised the bucket and it seemed to want to lose power and die again. Anyone have any ideas what could cause this? It is cold out but but the engine is warm and i due have anti gel in the fuel. Things I had previous repaired on this tractor were rebuilt injector pump rebuilt injectors and new radiator. Tractor ran good before I had the head taken in but it was burning out glow plugs left and right from the anti freeze coming through cracks in the head.

 

[geozeitl]

Forgot to write that these are pics before they welded the head

 

[JC-jetro]

Good afternoon, had my head sent out to be welded due to cracks around the combustion chamber. looked real nice when I got it back . I installed it with the service manual so it should be right. Also added two new exhaust valves because the old ones were badly pitted. Had all valves reground. After install I got it started and let it warm up. put it in 1st gear and drove it out of the shed. Noticed it seemed to lack power, like it wanted to die, I let it idle for a bit longer and it seemed to get better. I raised the bucket and it seemed to want to lose power and die again. Anyone have any ideas what could cause this? It is cold out but but the engine is warm and i due have anti gel in the fuel. Things I had previous repaired on this tractor were rebuilt injector pump rebuilt injectors and new radiator. Tractor ran good before I had the head taken in but it was burning out glow plugs left and right from the anti freeze coming through cracks in the head.

Nice :thumbsup:, did you do valve lash adjustment? perhaps valves might be leaking by some compression if not adjusted well. Perhaps on ignition stroke intake and exhaust valve leaking by some. Have you looked at combustion air intake and the canister type filter? Thinking old oil gotten a bit solid due to this horrible cold we're experiencing now. I use a bit of (2oz) of diesel boost per 5 gallon of diesel in my tractor as long as i remember and after 15 to 20 second of pre-heat(glow plug) my tractor starts quick ... of course if the battery has enough juice.

JC,

 

[mike48130]

Did you adjust the valve lash correctly? Check injectors and glow plugs are tight? Then I would check the compression.

 

[geozeitl]

Thanks for the replies, I set the lash when the engine was cold. Not sure if it matters or not.
Made sure the piston was TDC when setting them. Compression was checked earlier and was 390 psi on both cylinders

 

[JC-jetro]

Thanks for the replies, I set the lash when the engine was cold. Not sure if it matters or not.
Made sure the piston was TDC when setting them. Compression was checked earlier and was 390 psi on both cylinders

You are right. As the engine heats up valves elongate and basically all the metal expands just a bit so a hot engine does not show the actual gap. Now the owner's manual says , do the valve lash adjustment when the engine is cold and right in the same paragraph says do it at Idle. I don't know how the heck you can do it cold while engine is idling, adjusting the the screw with the screwdriver while rocker arm is going up and down and oil is splattering all over the place and using the feeler gauge all at the same time . It's totally nuts unless they have some special jig to do it with, doubt it!! Makes no sense to my estimation. On my IT service manual it basically says, do cold when each cylinder is at TDC on compression stroke. The rocker arm should be a bit lose on both intake and exhaust valve and both valves closed. Rotating engine crankshaft 360 degrees CCW should put next or second piston on TDC. On the crankshaft pulley there are two notches and a metal pointer on timing cover to verify TDC location, TDC is the first notch and the second notch is 30 degrees advance for when the injector should inject fuel, totally different discussion but the TDC part of it is the important thing for this discussion . I have two PDF attached to this post, one from Ford's original Owners Manual and one from IT service manual. I have checked mine cold using IT manual. Make sure the gap is .012 inch or 0.3 mm on both valves.

 

[Tazz]

It almost sounds like it's starving for fuel when the demand for it is higher. As in when driving or lifting the bucket. Is there a reason the fuel is not being fully delivered due to injector lines, filter, or a connection to the pump/governor? I'm just guessing at the relationship between power loss and power required at the time.

 

[JC-jetro]

It almost sounds like it's starving for fuel when the demand for it is higher. As in when driving or lifting the bucket. Is there a reason the fuel is not being fully delivered due to injector lines, filter, or a connection to the pump/governor? I'm just guessing at the relationship between power loss and power required at the time.

True enough, but if the rig worked fine before head replacement, then replacement has no direct bearing on the injection pump or it's timing. Something might have been dorked up with removal of injection lines and or the injectors themselves. There might be a chance that enough air is not bled in the lines all the way to fuel filter.

JC,

 

[Tazz]

True enough, but if the rig worked fine before head replacement, then replacement has no direct bearing on the injection pump or it's timing. Something might have been dorked up with removal of injection lines and or the injectors themselves. There might be a chance that enough air is not bled in the lines all the way to fuel filter.

JC,

That's what I was thinking too. Maybe something that was moved or removed to get to the head.

 

[arto98607]

Why did the cylinder head crack in the first place - were the injectors really bad before you dad them rebuilt?

Just asking because a tractor Diesel engine heads do not crack without a reason...