Quote Originally Posted by ragragtimetime View Post
been there many years ago with the 1986 4wd 2.6....don't remember how many were broken, had to replace all "adjusters" & "rocker arms". first symptoms were engine tapping, cold running, poor starting (cold), gas in oil, clogged catalytics. make sure to soak all new parts in oil (overnight if possible) prior to assembly & recheck torque after break-in (14-15ftlbs rocker arm "c" & 15-19ftlbs rocker arm "a"). why it happened...only thing i could come up with is "adjusters" wore/got stuck...never happened again. best of luck!
just drove it 8-0 miles. ran fine except a small miss in the exhaust tone at idle otherwise runs fine.

Only the tab for the jet valve broke off the rocker arm. The rocker arm is still operational and working the valve like it should.

The #2 jet intake valve is fried and the valve shaft is stuck in place in the guide. Until I get the jet valve eliminators I'm leaving it siezed in place cuz nothing to replace it with right now. The rest of the valve train is fine and everything else seems fine too.

Just the oil blow back through the rocker arm cover breather vent back towards the firewall.
It makes a real mess so I will make a catch bottle and keep the filtered opening up out of the oil collection area.

It does not over heat, stayed at 160 degrees all night during my paper route and i drive it everyday so can not afford to be without a vehicle.

I'm still baffled , does the jet valve passage goto the crankcase some how from the cylinder causing the crankcase to have more
pressure causing the oil to blow out through the breather vent?

It seems the pressure is stronger then it was noticeable before this discovery of the broken jet valve and tab busted off the rocker arm itself.

Anyone have a 2.6 ltr engine for a 4x4 mm or d50 that's good they want to sell cheap?

Could use a 0991 ratio rear end to, hell how about the whole truck.