- Joined
- Oct 21, 2004
- Location
- BFE Desert east of Cali
Been trying to figure this one out, nothing makes sense.
I've got engine oil showing up on the pass. side of the water pump, right by the coolant hose, and following the timing cover to the oil pan, and so on.
- The oil is also on the block, covers about 2-3" of the block, head gasket surface down.
- Cylinder head is dry, cam, intermediate shaft and crank seals are dry.
- Timing cover is dry inside the lower cover, wet outside the lower cover.
- Rear timing cover is dry against the cylinder head.
- Bearing cap has been resealed against the head.
- Turbo oil feed is via front oil galley plug, verified no leaks.
- This leak showed up rather suddenly.
- Oil pressure is 4.5b cold at anything over 1000rpm, 3b hot at 2500, never seen 5b at any point.
- Head stud torque confirmed (ARP studs, torqued to 120ft.lbs years back, loosened 1/4t and retorqued to 120, no change in the leak).
So, at this point, I'm looking at either a head gasket failure (gasket is a Cometic, surprised it would suddenly start leaking) or a timing cover gasket failure. There's no oil passages in the area this leak is coming from on the head surface, but the oil on top of the pass side only on the water pump seems strange. If it's whipped from the e-fan, that might make a little sense if it's the timing cover. Timing cover gasket is a load easier to change than the head gasket though.
Thoughts?
I've got engine oil showing up on the pass. side of the water pump, right by the coolant hose, and following the timing cover to the oil pan, and so on.
- The oil is also on the block, covers about 2-3" of the block, head gasket surface down.
- Cylinder head is dry, cam, intermediate shaft and crank seals are dry.
- Timing cover is dry inside the lower cover, wet outside the lower cover.
- Rear timing cover is dry against the cylinder head.
- Bearing cap has been resealed against the head.
- Turbo oil feed is via front oil galley plug, verified no leaks.
- This leak showed up rather suddenly.
- Oil pressure is 4.5b cold at anything over 1000rpm, 3b hot at 2500, never seen 5b at any point.
- Head stud torque confirmed (ARP studs, torqued to 120ft.lbs years back, loosened 1/4t and retorqued to 120, no change in the leak).
So, at this point, I'm looking at either a head gasket failure (gasket is a Cometic, surprised it would suddenly start leaking) or a timing cover gasket failure. There's no oil passages in the area this leak is coming from on the head surface, but the oil on top of the pass side only on the water pump seems strange. If it's whipped from the e-fan, that might make a little sense if it's the timing cover. Timing cover gasket is a load easier to change than the head gasket though.
Thoughts?