Is the rectangular hole where the timing chain is, the only place where oil goes back down through the head? Are there no oil gullies?

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No matter how many times you explain it to me, I'm still right.....Surf-n-Turf

Yep. No pushrod holes to go down.

Must be some serious puddling going on when pulling one of those long steep grades in the mountains!

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2009 VW TDI Jetta Sportwagon 172k miles (rear-ended harder than Elton John on 8/4/13. Total loss)

1991 Volvo 240 142k miles (T-boned by a stop sign runner. Total loss)

Unless there is a hole(s) hidden in the back that I haven't seen.

EDIT: Could this be a drain hole?

Attached Thumbnails

 

yowser! what happened to that No 4 valve? someone drop a ball bearing in there?

sure looks like it could be a drain.would make sense.

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1984 123.193 372,xxx miles, room for Seven.

1999 Dodge Durango Cummins 4BTAA 47RE 5k lb 4x4 getting 25+mpgs, room for Seven.

i would have said there are other oil holes, but i am not for sure.

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

I think its just that little hole at the back and the timing chain opening, I'd assume that'd be plenty....

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-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

oh the one with the red arrow?

yeah that should do it.

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

It's plenty to get the oil back to the sump, but with the valve cover gasket surface being barely above the "floor," I'm sure this design is one of the reasons the gaskets aren't so good at preventing leaks (that and the fact that there are only four bolts on such a large valve cover, and the gasket that's u-shaped). The engineers could have done a better job in this regard.

i have never had a problem with the gasket leaking back there. keep a good gasket in it and you shouldnt have a prob.

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

When I did my valve adjustment the cover was on real tight (dealer had done the last one)....when I finished I installed the gasket...torqued it to MB spec...started it...and promptly had 1/4qt of Mobil 1 on the floor of the garage, compliments of the rear of the engine (leaked out by the 4/5 cyl area)....so I loosened it again, reseated it, and tightened it like the dealer had done...started it up, no leaks....

__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

Yah, I just crank 'er down with the 3/8 drive hand ratchet...... Tight as I can get it with one hand......... Never leaked, I've had it off twice so far (will be three times not too long from now..........)

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-Matt

EPA Section 609 Certified MVAC Technician
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Oil Burner Kartel Member #10

Ahh the smell of Diesel Fuel, it's like coffee in the morning!

My Car:

1982 300SD Turbo Diesel (231,500 miles!) RIP

1984 300SD Turbo Diesel Custom (235,500 mi on driveline.) - On Road!!

www.icsrepair.com

I put mine back on what I call "a liitle more than snug". No leaks yet. I was just surprised how much oil was sitting on the head when I pulled the cover off. my first thought was clogged gulleys, but I couldn't find any. Seems like it gives too much chance for the oil to start getting sucked through valve seals.

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No matter how many times you explain it to me, I'm still right.....Surf-n-Turf

the valve cover must have been sitting on part of it wrong.

the other way they leak is if a knucklehead tightens the bolts so far they warp the valve cover. trying to correct for a gasket that is shot.

tom w

__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

The rear of my valve cover is leaking.. I guess I should take it off and put it back on.