Does anyone have any info on the oil flow direction to and from the oil cooler on a 603 engine? Specificly i want to know what line feeds the cooler (top or bottom).

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82 Rabbit diesel (first d), 84 Jetta turbo d (300k when sold), 83 240d (305k when sold), 84 F250 6.9d w/Banks turbo(parts truck), 86 F250 6 cyl.gasser(waiting for 6.9d), 84 300d ( 347k Sold 8/04), Y2k New Bettle TDI (185k miles), 95 740IL (wifes), 87 300TD (206k Sold 7/05), 05 Passat TDI Wagon

Your hand will tell you everything you need to know. If I remember correctly the bottom line feeds and the upper is the return. The line you can hold is the return.

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1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200

I didn't think of that.

Doesn't the cooler stat have to open first b4 the lines heat up?

I was hoping for an oil flow chart so i can clamp my oil temp sensor on the correct line but a little trial and error will give me the same results.
Thanks for the reply.

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82 Rabbit diesel (first d), 84 Jetta turbo d (300k when sold), 83 240d (305k when sold), 84 F250 6.9d w/Banks turbo(parts truck), 86 F250 6 cyl.gasser(waiting for 6.9d), 84 300d ( 347k Sold 8/04), Y2k New Bettle TDI (185k miles), 95 740IL (wifes), 87 300TD (206k Sold 7/05), 05 Passat TDI Wagon

I also have an oil temp sensor I'd like to make functional at some point....where is the best location for it? If I just connected it to the metal line to the oil filter housing coming back from the cooler and made a good contact with some flux/solder or something would that be good enough? Its meant to be put in as a drain plug on the pan, but the sensor is way too small for the OM617 drain plug hole, I think its meant for regular spec US Gasser drain plugs. Whats the best/easiest way to make this work? I bet it would be real hard to find a sensor that fits properly into the drainplug of mine.

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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)

D:\program\Engine\602_603\18-005.pdf

Lets see if this works.

ok it didn't I'll email it to you.

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1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200

The easyest way would be to get another oil plug and drill and tap it so the sensor can thread into it. The only drawback is that you have the wire to deal with at oil change time.

My sensor has 1/8 npt thread and i have it theaded into a piece of 3/8x1x2 aluminum that i will hose clamp onto the oil cooler line for now. Eventualy i will drill and tap a hole in a better spot, maybe in the pan,filter housing or turbo return drian.

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82 Rabbit diesel (first d), 84 Jetta turbo d (300k when sold), 83 240d (305k when sold), 84 F250 6.9d w/Banks turbo(parts truck), 86 F250 6 cyl.gasser(waiting for 6.9d), 84 300d ( 347k Sold 8/04), Y2k New Bettle TDI (185k miles), 95 740IL (wifes), 87 300TD (206k Sold 7/05), 05 Passat TDI Wagon

I was also considering just taking off the pan and bringing it to a machine shop where they could drill/tap a hole that fits the sensor as if it were just a second drain plug, then I'd never have to worry about it and I could use the other plug normally. Once its warmer I think I will do that. It'd also give me a chance to inspect the inside of the pan, the oil pump, and the oil pump intake screen and such.

__________________
-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)

Hey hatty thanks for the email attempt, i sent you a reply with my address but maybe the file is to large for hotmail.

pawoSD
Your lower pan is steel and should realy have a nipple brazed in for the sensor to thread into. The pan itself is not thick enough.
It would be great if there was plug somewere in the block that could be taken out to thread the sensor into. That is what i did on my old jetta td.

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82 Rabbit diesel (first d), 84 Jetta turbo d (300k when sold), 83 240d (305k when sold), 84 F250 6.9d w/Banks turbo(parts truck), 86 F250 6 cyl.gasser(waiting for 6.9d), 84 300d ( 347k Sold 8/04), Y2k New Bettle TDI (185k miles), 95 740IL (wifes), 87 300TD (206k Sold 7/05), 05 Passat TDI Wagon

jayb79 I am so sorry I just havn't had the time. I will get it out to you tomarrow before 4pm I havn't forgotten.

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1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200

Hatty,
Thanks for the info its exactly what i was looking for. You were correct the bottom line feeds the cooler.
Thanks again

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82 Rabbit diesel (first d), 84 Jetta turbo d (300k when sold), 83 240d (305k when sold), 84 F250 6.9d w/Banks turbo(parts truck), 86 F250 6 cyl.gasser(waiting for 6.9d), 84 300d ( 347k Sold 8/04), Y2k New Bettle TDI (185k miles), 95 740IL (wifes), 87 300TD (206k Sold 7/05), 05 Passat TDI Wagon

Good I thought that would help; if you need anything else I have the CD.

__________________
1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200