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  #1  
Old 09-13-2008, 07:22 PM
a2t a2t is offline
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87 300D Leaking Oil Pressure Sender ...

Im *pretty sure* this is where the leak is coming from, although everything that ever held fluid at any point on this vehicle seems to have leaked at some point. But this is leaving drips on my driveway, and I can see drips forming on the bottom of the sender can.



So, my questions for the gurus are :

1. Is there another common area nearby to consider as the culrprit before buying the new sender ?

2. What size wrench do you use to unscrew it - can I just take channel locks to the old can, and how tight should I install it?

3. Is it easier to get at it from top or bottom ?

Thanks

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Old 09-14-2008, 12:48 AM
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The only way to know for sure if it is the sensor or a near by area is to give the area a good cleaning (it is a good idea to have the area clean anyway to replace the sensor).

One of the ways they go bad is to leak. I have the same situation on a 84 Cavalier. It is seaping oil but also not working.

A Channel Locks is OK for removal of the old sensor since it is already no good but I guess you will have to use your best judement to use a Channel Locks for installation.
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Old 09-15-2008, 11:18 PM
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Thanks,

has anyone done this R&R on 87 300D ??????????
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Old 09-15-2008, 11:51 PM
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in case anyone else needs info, i found this -

10-28-2006, 03:31 PM
Chris_87_300D
Registered User Join Date: Feb 2006
Location: Austin, TX
Posts: 5

Easy job

--------------------------------------------------------------------------------

Just did my 87 300D today - thanks to all for the tips. As per above, my oil pressure sender/switch is mounted at the base of the oil filter housing, driver side. I didn't have to remove the oil cooler lines, here's my 30 min procedure:

1. Remove middle tube in oil filter housing to allow oil to drain into pan (might not be necessary but thought it may reduce the chance of an oil mess)
2. Siphon out WW fluid and remove bottle
3. Remove 2 10mm screws holding on the aux. water pump so you can move it out of the way (also not necessary but gives you a little more room for not much effort) - Don't remove hoses
4. Remove 2 10 mm bolts on the lower part of the cruise linkage (to move the cable out of the way that blocks your access to the oil pressure sender)
5. Unhook wire and clean the female end with a Q-tip packed tight between your fingers and then sprayed w/ contact cleaner (should enter the hole easily so you don't spread or leave cotton fibers)
6. Remove old sensor w/ 17mm open end wrench
7. Install new sensor, tighten w/ 17mm open end wrench, reinstall wire
8. Re-attach linkage, aux. water pump, WW fluid bottle
9. Test - turn key on but don't start (on mine, guage read 0 bar but did move a tiny bit vs. key off), start (should move up to 3 bar pretty quick if cold after filter housing is refilled)
10. When everything works, refill WW bottle and enjoy your new info and $100+ you saved!

Chris_87_300D
1987 300D Turbo - 295,000 miles

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Last edited by Chris_87_300D; 10-28-2006 at 03:34 PM. Reason: clarification
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Old 09-18-2008, 04:37 PM
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Just to wrap this up (and hopefully be of some assistance to others on here for once)...

I was able to R&R the sender from the top side. Although my water bottle is relocated to trunk so perhaps that made it easier. I did remove the aux water pump and associated 2 hoses, unclipped the throttle cable and pushed it out of the way, and then removed the aft bolt on the throttle cable bracket and loosened the fwd 1 so I could swing bracket down and out of way.

All this provided a really clear shot at the sender on bottom of oil filter housing. I used 17mm wrench and it came right off. Interesting to note that the old sender was also VDO but had some kind of wax/gasket brownish material on the inside (engine side) which was all cracked - inevitably where there thing was leaking from. The new VDO sender did not have this gasket, all metal.

Anyways, thanks for all help, hopefully this thread will do someone else some good down the road.

Oh yeah, I didnt drain oil, and none came out (probably because car was jacked up on drivers side to make room for catch pan under car).

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