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Recommendation: I've only done this once, but it was recent. My only thought is that Dwayne's write-up for the TB/WP is very detailed and his section for repairing the tensioner is pretty darn good; it helped me get through it and I'm a complete amateur when it comes to working on cars. It's just another item to do while you're in there.
Okay, I have the driver's side cam gear off and there's no sign of oil from the cam seal, but it looks like the La Brea tar pit behind the shield. What's my problem?
Have you checked the L-shaped hose that connects to the passenger side of the oil separator housing? Most of the oily mess from my car seemed to come from that hose and the one that joins to the vertical sump tube. Right under the green wire in your picture.
Yes that is one of the usual suspects. The other is the hose going into the oil separator. The rubber gets hard and no longer seals. The oil leaks out and pools in the trough in the engine casting. As you brake and corner it sloshes out and run downs the front of the engine. Of course there are other sources of oil leaks but this is pretty common.
I typically do not wrench on my vehicles. It am a good problem solver and can determine what is wrong. My problem is that I end up breaking 3 things getting to the one thing that needs fixing. And no it is not just the 928 either. Seems to be with ANY vehicle I attempt to work on.
It didn't used to be that way. Did a fair bit of wrenching when I was younger. Even swapped engines in two cars, and each was done over a long weekend with no issues.
Anyway, that is why my 928 GTS sits at the mechanics getting the piston oil ring grooves drilled. They weren't.
Oh, yes. Triumph Daytona 500, BSA 650 Hornet (raced)
Royal Enfield 500 twin (your Royal Oilfield comment cracked me up)
Velocette 350 KSS (now THERE was a bicycle!)
Velocette Venom Thruxton 500 (raced) (now THERE was a model name!),
Norton dealer and "factory trained mechanic"
(now THERE was hyperbole...)
To make this a legit 928 thread, the silicone OPG stopped my sump oil leaks.
So there...
Originally Posted by FredR
Bob,
I was blooded on British motorcycles- the only time they did not drip was a bad sign- no oil in the thing! My first bike was a British made Royal Enfield Continental [should have been called a Royal Oilfield]- really quite a nice little machine. Could not stand its penchant for dripping oil so pulled it apart with little more than a pair of pliers and a screwdriver. I actually managed to stop it dripping, then of course sold it to purchase a Triumph 650 twin when I got my full license to run rampant and then had twice the number of leak sources! Pulled that apart and made it oil tight [more or less].
Oh, yes. Triumph Daytona 500, BSA 650 Hornet (raced)
Royal Enfield 500 twin (your Royal Oilfield comment cracked me up)
Velocette 350 KSS (now THERE was a bicycle!)
Velocette Venom Thruxton 500 (raced) (now THERE was a model name!),
Norton dealer and "factory trained mechanic"
(now THERE was hyperbole...)
To make this a legit 928 thread, the silicone OPG stopped my sump oil leaks.
So there...
Norton Commando MkIIa when I was a bright know it all 17 YO. All matter of oil leaks and a blow head gasket and whitworth spanners I learned lots
Shawn.........full belt, gears, tensioner rebuild with bushings/bearings and WP and then.....
These pictures may help. First is the oil separator housing removed. You can clearly see the source of the oil. The hose is new as I was going to just replace that and move on but decided to pull everything off the top of the engine to clean the V. As well as the hoses leaking the gasket shrinks with age which compromises the seal all around the edge. The second picture is the breather hole in the block where the oil get flicked up from the crankshaft. The oil settles to the rear in the V of the engine block and to the front in pockets in the casting that form lovely holding ponds of oil.
Okay, so last night I checked out the hoses and they're fine. No rot, hose clamps nice and tight. I went to loosen the bolt holding the oil separator to the top of the motor and found that it wasn't even finger tight! I'm pretty sure I didn't loosen it when I did the vacuum lines and intake last year, so it must have loosened over time with vibration. I cleaned it off and retightened it and we'll see how that goes.
I still might as well do the cam seals, I need to rebuild the tensioner, and then get everything back together.
05-01-2017, 08:07 PM
