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  #211  
Old 03-15-2013, 04:53 PM
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Originally Posted by Orv View Post
Wouldn't hurt, although it DEFINITELY grabbed my attention when my VW blew an oil cooler O-ring at 45 mph.
Is that common on a VW? How many miles on yours? Should I be proactive and replace the oring on my 92 Jetta?
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  #212  
Old 03-15-2013, 04:57 PM
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Re. tapping the filter lid on 617's I recall reading somewhere in this forum that pressure can be read when the oil is cold but with hot oil, pressure went to near zero. Is that true?
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  #213  
Old 03-15-2013, 06:19 PM
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Oil filter cannister cover

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Originally Posted by Orv View Post
BTW, tapping the oil filter cover is genius -- wouldn't have thought of that. I wonder if this'd also be a good place for an oil temp sensor? VWs used to put them in the oil filter mount.
Thanks, I can't take credit for the idea, Sixto suggested it to me. Yes, you could put a temperature gauge sender in the cover too, there's room for both. Might look a little busy and the purists would certainly object. Remember to make the leads long enough so you can remove the cover for filter changing.

For my '87 300D Turbo, I removed the oil drain plug and put a temperature sender in its place.

Jeremy
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Our all-biodiesel family
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  #214  
Old 03-15-2013, 09:44 PM
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Quote:
Originally Posted by funola View Post
Is that common on a VW? How many miles on yours? Should I be proactive and replace the oring on my 92 Jetta?
On mine it failed on a cold morning with about 150,000 miles on the odometer. The oil came out really fast -- the buzzer went off after about two miles, and I think I left a whole quart just in my parking space. I could follow the oil trail all the way back home.

If yours has never been replaced, I would do it ASAP. It's an inexpensive part, and not a particularly hard fix except that it's a little tight reaching up in there. The O-ring is sandwiched between the oil cooler and the block mount. You'll need a pair of channel locks or a really big deep socket to get the nut off the threaded pipe. If your oil cooler hoses are going soft, this is the time to change 'em. Also a good time to do a cooling system flush.

EDIT: Here's a full write-up I did a while back for the Topless Rabbit forum: http://www.toplessrabbit.com/forums/viewtopic.php?f=6&t=2576

I found one Cabriolet where someone had replaced the oil cooler seal with the rubber seal from an old oil filter! I do not recommend that substitution.

Last edited by Orv; 03-15-2013 at 09:52 PM. Reason: Add link
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  #215  
Old 03-15-2013, 09:58 PM
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Originally Posted by funola View Post
Re. tapping the filter lid on 617's I recall reading somewhere in this forum that pressure can be read when the oil is cold but with hot oil, pressure went to near zero. Is that true?
I tested My oil pressure on My 84 300D with fitting drilled into the Oil Filter Lid and you get the same pressure there you do at the Gauge; hot or cold. Except that the Test Gauge had a range of over 3 Bar.

I put My Oil Pressure Alarm sending unit where the Test Gauge was hooked up and My Bypass Oil Filter Oil inlet line is connected to the Center of the Oil Filter Lid/Cap. Both get Oil pressure all of the time.

From post #7 of this thread:
Here is my previous thread on a low oil pressure alarm. One member objected to tapping into the top of the oil filter top coverer so if you do not want to do that you will have to find someplace else to tap into the oil pressure. Mine system is a “bare bones” type system. The buzzer sounds until the oil pressure is up above that of the sending unit is set at. There may be another places to get the (+) current from that is only connected when the ignition is in the “run” position but I have not taken the time to look at the wiring diagrams or poked around with my tester to find it. So mine buzzes until the oil pressure is up.
The easiest thing would be to put to put in as switch that would open the circuit while your thumb pushes on the button if you do not want to hear the sound during starting.
But, if your alarm dose not sound during starting how will you know a wire did not come loose or break? You would start up and go thinking your alarm is working.

A new sending unit and a buzzer from Radio Shack should not cost that much.
Another question is how much amperage can go through the sending unit? For instance; a back up alarm for a cars, truck and forklifts could be used and they are certainly loud enough but would the amps pulled burn out the sensor?
Low oil pressure alarm for 617.952


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  #216  
Old 03-15-2013, 10:47 PM
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Error

Quote:
Originally Posted by funola View Post
Re. tapping the filter lid on 617's I recall reading somewhere in this forum that pressure can be read when the oil is cold but with hot oil, pressure went to near zero. Is that true?
That may have been a comment of mine. It was an error.
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"Buster" in the '95

Our all-biodiesel family
1995 E300D (W124) . .239,000 miles My car
1996 E300D (W210) . .313,000 miles Wife's car
Santa Rosa population 170,685 (2012)
Total. . . . . . . . . . . . 722,685
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970
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