Blueman

I see drips off the bottom of the transmission bell-housing, but can't find a clear source above it and am looking for ideas.

The vehicle was cold (55degF) and I ran it for a couple minutes to move it into the garage. After a week, the small puddle formed below the rear of the engine, with drops from the bell-housing.

I cleaned it up, and cleaned up what seemed to be dampness on top of the rear intake manifold. Started the engine, and ran it idling for 20 minutes with heater and A/C on. No drops anywhere I could find. There was steam coming up around the EFI plenum a few minutes after starting the engine, but not clear source could be found. Steam went away after the engine was fully warm.

I'm stumped why it might leak when sitting cold for a week, but nothing comes out after running for 20 minutes, pressurizing the system

Ideas?

Video of the steam: https://drive.google.com/file/d/1-W6...ew?usp=sharing



top of rear intake manifold (before cleaning)

Drips off of bell-housing

wallytoo

iTrader: (1)

i'd check the pipe just ahead of the fuel filter.. above the oil filter...that's where mine was leaking, at the gasket interface with the underside of the plenum. the leak showed on the back edge of the bellhousing, just like yours.

Blueman

Are you suggesting this pipe? Would the fix then be a replacement of the gasket just above the oil filter?

wallytoo

iTrader: (1)

that's the gasket that i replaced, and stopped the leak. maybe check that location in the morning, after it has cooled (since that seems to be when it leaks), to confirm that's where it's coming from before pulling the tube and replacing the gasket.

edit: to clarify, it's an O-ring there, rather than a paper gasket.

wallytoo

iTrader: (1)

if you are getting coolant on top of the intake runners, that pipe i showed can't be the source. for that, i'd suspect the temperature gauge sending unit, which is buried down in there, mid-way along the head.

best shot i have of the gauge sender. the male-terminal blade is visible at the base of injector #2 (just above the coolant bypass hose)


another source back there would be the head by-pass plate at the rear...

Jimkola

I had to replace that pipe. The flange lip where the o-ring goes was so deteriorated that it was questionable just how great a seal i was getting.