North American Turbocoupe Organization

Still have an oil leak! Need help.
Hey guys,

Looks like my oil leak is not repaired. It seems as though the oil is coming from driver's side of the motor. What's over there that could cause an oil leak. I've replaced the low level sensor, checked the PCV valve (it's fine). There is no oil at all on the turbo side of the motor. I know that the oil pressure sending unit is on the driver's side. It may also be that oil filter housing. Please correct me if I'm wrong but I think that housing is a part bolted onto the block. Pete D. said that the lines going into the housing are coolant lines. I had to replace those so this was good to know. Is that housing an oil cooler because of the turbo adding all kinds of heat to the oil? Could that housing be leaking? How do you take it off? Does it have an associated gasket or oring? Are there ANY other oil lines running under the upper intake and above the lower intake? Looks like it may even be slightly spraying and not just dripping.


Dan E Offline
Posting Freak
That is an oil cooler behind the Oil Filter. It is held to the block by the "plug" in the center of it (that the filter screw to). There is a rubber gasket between the oil cooler and the block and these can leak.

The other source of oil could be from the oil feed line to the turbo. It is connected to the Driver's side back side of the head.

Dan Eaves
88TC 5spd, Shortblock with Crower 5.5" Sportsman Rods and Short Wiseco Pistons bored .030" Over, Ported Head with Polished Combustion Chambers, Gutted & Polished Upper, Ported & Polished Lower, Polished T/B, Ported E6, SVO T3 Turbo, 3" DP w/No Cat, RR Cam, Adjustable Cam Sprocket, K&N in Fenderwell, Gillis Boost Valve, Centerforce I Clutch, Removed A/C, Polished Wheels, Polished Valve Cover, Polished Crank and W/P Pullies, and the DAMN Heater Core is new too !
Dan Eaves
88TC 5spd Vermillion Red, Polished...everything...

Kind of sounds like a seal of some kind. Try taking your car to the car wash and washing the engine to see clearly where the leak(spray) is coming from. Give that a try. I could be wrong but I could be right

mmedic50 Offline
Senior Member
I have heard other posters say that oil was comming from their oil dip stick, and it's on the drivers side of the engine. Try some florescent oil dye from NAPA after you wash the engine. That stuff works great!
1988 TC 5 speed, Dark Blue
Build date 5/88.
140 mph Ford Motorsport Speedometer
Walbro 255 Fuel Pump
Kirban Adj. Fuel Pressure Regulator
K&N Air Filter
Gillis Boost Control Valve
New rebuild- .030 over pistons.
SS valves(1.89/1.59).
Center Force Stage II clutch.
ARP head studs.
Crane roller cam .450 lift.
Gutted upper and ported lower intake.
Ceramic coated and ported E6 exhaust.

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