Oil Pressure Sender - The 1947 - Present Chevrolet & GMC Truck Message Board Network

apstguy · 03-18-2003, 01:40 AM

I replaced my oil pressure sender a couple weeks ago. It works now, just not at the right range. It stays at about 12psi at idle and about 18 cruisin. I know this isn't right. What could cause this? Wrong sender unit? I did put teflon tape on the threads - could that cause a bad ground? I don't think my truck has a ground strap from the block to the frame either. The engine has never been swapped or had ANY major overhaul so I can't figure out why it would be missing. Where is it on the 85s?

gchemist · 03-18-2003, 02:26 AM

Remove the tape. There should be nothing on the threads.

apstguy · 03-18-2003, 09:45 PM

ok. I'll try that this weekend!

apstguy · 03-18-2003, 11:29 PM

How about the other q's?????

gchemist · 03-18-2003, 11:31 PM

If your engine is missing the ground strap you should add one. They are cheap and easy to find.

**crossy** · 03-19-2003, 12:54 AM

If they happened to give you a sender from an 80 PSI gauge from a large truck (doubt it ) then it would do that. keep in mind that the gauges are junk also. I should know with all the dashes I've redone. In the 85 I just bought the OP, Gas & temp gauge were bad. those stinking OP sending units are high $$ too! I have a few good old ones that I keep around from parted out trucks. call the store you bought it from and go through what you want it for and see if they give the same part number as what is on your empty box? Good luck, DAVE

03-18-2003, 01:40 AM	#1
apstguy LED King Join Date: Jan 2003 Location: Sacramento, CA Posts: 2,088	Oil Pressure Sender I replaced my oil pressure sender a couple weeks ago. It works now, just not at the right range. It stays at about 12psi at idle and about 18 cruisin. I know this isn't right. What could cause this? Wrong sender unit? I did put teflon tape on the threads - could that cause a bad ground? I don't think my truck has a ground strap from the block to the frame either. The engine has never been swapped or had ANY major overhaul so I can't figure out why it would be missing. Where is it on the 85s? __________________ Tyler 1985 C10 305 w/ Bowtie OD TH700R4 3.42 LSD 202,000 miles 2006 Ford Focus ZX3 5-speed Stick 2016 Chevy Spark EV Gone: 2002.5 VW GTI 24v VR6 Gone: 2008 VW R32

03-18-2003, 02:26 AM	#2
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Remove the tape. There should be nothing on the threads. __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

03-18-2003, 09:45 PM	#3
apstguy LED King Join Date: Jan 2003 Location: Sacramento, CA Posts: 2,088	ok. I'll try that this weekend! __________________ Tyler 1985 C10 305 w/ Bowtie OD TH700R4 3.42 LSD 202,000 miles 2006 Ford Focus ZX3 5-speed Stick 2016 Chevy Spark EV Gone: 2002.5 VW GTI 24v VR6 Gone: 2008 VW R32

03-18-2003, 11:29 PM	#4
apstguy LED King Join Date: Jan 2003 Location: Sacramento, CA Posts: 2,088	How about the other q's????? __________________ Tyler 1985 C10 305 w/ Bowtie OD TH700R4 3.42 LSD 202,000 miles 2006 Ford Focus ZX3 5-speed Stick 2016 Chevy Spark EV Gone: 2002.5 VW GTI 24v VR6 Gone: 2008 VW R32

03-18-2003, 11:31 PM	#5
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	If your engine is missing the ground strap you should add one. They are cheap and easy to find. __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

03-19-2003, 12:54 AM	#6
crossy Oh,you can't buy that new Join Date: Apr 2000 Location: Pennsville,N.J. 08070, USA Posts: 2,039	If they happened to give you a sender from an 80 PSI gauge from a large truck (doubt it ) then it would do that. keep in mind that the gauges are junk also. I should know with all the dashes I've redone. In the 85 I just bought the OP, Gas & temp gauge were bad. those stinking OP sending units are high $$ too! I have a few good old ones that I keep around from parted out trucks. call the store you bought it from and go through what you want it for and see if they give the same part number as what is on your empty box? Good luck, DAVE __________________ "been there, done that, ruined the T-shirt". 2007 LBZ GMC Sierra, ECSB 2006 LM7 RCSB Silverado 98 Vortec project. 94,3500,6.5L 4L80 81 SWB GMC POS finally gone 73 Pinto, stock, w/CragarSS's-eww LOTS of Cummins trucks.



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