I have searched for this and found lots of information on this site about gas in oil (leaking fuel pump) but not much on both together.
So I have a 67 FJ40 with F engine just finished frame off restoration (first one, and never really finished) just started test driving it on the road. It is mostly original and only had 30k miles. We rebuilt the carb and replaced the filters but otherwise did not do anything to the engine. Seemed to start and run fine,
Once on the road it would stall after getting warm, even just while shifting. Vacuum was steady at 18. I tried to adjust the idle mixture and it gave max vacuum when almost closed. It still has the exhaust manifold heat valve that seemed stuck and in the middle so I moved it to the warm position. Next trip it was stalling worse, running a little rough and when starting it would produce huge white clouds. before getting home it got to the point where it would barely start and not keep running making massive clouds. We were looking at the engine and saw oil leaking low on the drivers side. So we towed it home. It seemed the oil was leaking out from the shaft of heat valve on the exhaust manifold (not a good sign I assumed)
After research here on Ih8mud I was thinking head gasket or other so checked the dip stick and found the level high and smelling of gas, no foamy cream appearance. Dripped some of it o a piece of wood and it lite easily with a lighter. Checked the plugs and they looked like this, 4 with oil and 2 black but dry. Compression was 125-140 on all.
The checked the tail pipe and there was thin black oil at the end. Gas in the oil and oil in the cylinder. As Poser often states its the fuel pump leaking into the block. I'm going to re build that, but what about the oil? Could it be that its leaking into some of the cylinders since the gas thinned the oil and its coming in at the valve seals, or are the valve seals shot, or could it still be the head gasket......... This truck only had 30K but since 1979 it had not left the PO's small yard, and was rarely driven. I would really appreciate any help from you experts. Thanks
Steve
So I have a 67 FJ40 with F engine just finished frame off restoration (first one, and never really finished) just started test driving it on the road. It is mostly original and only had 30k miles. We rebuilt the carb and replaced the filters but otherwise did not do anything to the engine. Seemed to start and run fine,
Once on the road it would stall after getting warm, even just while shifting. Vacuum was steady at 18. I tried to adjust the idle mixture and it gave max vacuum when almost closed. It still has the exhaust manifold heat valve that seemed stuck and in the middle so I moved it to the warm position. Next trip it was stalling worse, running a little rough and when starting it would produce huge white clouds. before getting home it got to the point where it would barely start and not keep running making massive clouds. We were looking at the engine and saw oil leaking low on the drivers side. So we towed it home. It seemed the oil was leaking out from the shaft of heat valve on the exhaust manifold (not a good sign I assumed)
After research here on Ih8mud I was thinking head gasket or other so checked the dip stick and found the level high and smelling of gas, no foamy cream appearance. Dripped some of it o a piece of wood and it lite easily with a lighter. Checked the plugs and they looked like this, 4 with oil and 2 black but dry. Compression was 125-140 on all.
The checked the tail pipe and there was thin black oil at the end. Gas in the oil and oil in the cylinder. As Poser often states its the fuel pump leaking into the block. I'm going to re build that, but what about the oil? Could it be that its leaking into some of the cylinders since the gas thinned the oil and its coming in at the valve seals, or are the valve seals shot, or could it still be the head gasket......... This truck only had 30K but since 1979 it had not left the PO's small yard, and was rarely driven. I would really appreciate any help from you experts. Thanks
Steve