broken oil pressure sending unit help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ajbirken · 03-08-2004, 11:03 PM

My oil pressure gauge has been on the blink. Seems ok at startup, but will then drop. I tap the gauge itself and it comes back up. So I figure it's probably just a loose connection, but I want a mechanical gauge so i know what's really going on.

I try to unscrew the fitting and it snaps off with the threads still in the manifold.

I figure I'm screwed and have to take off the manifold and drill out the old fitting. Is this my only option?

jhow66 · 03-08-2004, 11:11 PM

What kind of engine are you talking about?

ajbirken · 03-08-2004, 11:14 PM

chevy 350. the oil pressure sending unit is on the drivers side next to the dizzy. Edelbrock performer intake.

Gordo · 03-08-2004, 11:15 PM

That fitting is threaded into the block not the manifold if you have a SB Chevy. I would remove the distributor to give you more room to work and try an easy out, but be gentle so not to snap the easy out also.

ajbirken · 03-08-2004, 11:17 PM

OUCH!

I was afraid of that.

No good deed goes unpunished.

Can i use WD-40 or PB blaster now that the oiling system is "open"?

angelsairman · 03-09-2004, 02:53 AM

if you were going to use WD-40 to help loosen it up id go with Mystery Oil instead, let it sit on it for awhile and it will work its self in to the threads and hopefully loosen it up, also works great to help unsieze lawn mower engines HAHAHAHA

ajbirken · 03-09-2004, 03:11 AM

Thanks for all the replies.

The mystery oil stuff is a good idea.

03-08-2004, 11:03 PM	#1
ajbirken Registered User Join Date: Nov 2002 Location: raleigh, NC Posts: 60	broken oil pressure sending unit help My oil pressure gauge has been on the blink. Seems ok at startup, but will then drop. I tap the gauge itself and it comes back up. So I figure it's probably just a loose connection, but I want a mechanical gauge so i know what's really going on. I try to unscrew the fitting and it snaps off with the threads still in the manifold. I figure I'm screwed and have to take off the manifold and drill out the old fitting. Is this my only option? __________________ 1971 GMC Jimmy 350/350/205/D60/14bolt on 38's 1984 M1008 CUCV 6.2/TH400/208/D60/14bolt on 36's 1991 W250 5.9/G360/205/D60/D70 on 33's (tow-rig) Lotsa Full Size Jeeps (J10/J20)! Adam

03-08-2004, 11:11 PM	#2
jhow66 Registered User Join Date: Jun 2002 Location: Knoxville Tenn. Posts: 3,058	What kind of engine are you talking about? __________________ 56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer

03-08-2004, 11:14 PM	#3
ajbirken Registered User Join Date: Nov 2002 Location: raleigh, NC Posts: 60	chevy 350. the oil pressure sending unit is on the drivers side next to the dizzy. Edelbrock performer intake. __________________ 1971 GMC Jimmy 350/350/205/D60/14bolt on 38's 1984 M1008 CUCV 6.2/TH400/208/D60/14bolt on 36's 1991 W250 5.9/G360/205/D60/D70 on 33's (tow-rig) Lotsa Full Size Jeeps (J10/J20)! Adam

03-08-2004, 11:15 PM	#4
Gordo Registered User Join Date: Jan 2001 Location: Killingworth, CT. USA Posts: 3,378	That fitting is threaded into the block not the manifold if you have a SB Chevy. I would remove the distributor to give you more room to work and try an easy out, but be gentle so not to snap the easy out also. __________________ 1971 C10 swb stepside 350/700R4/3.73posi (retired as of 4/22/03) 1998 S10 short bed 2002 S10 Blazer 1942 Oldsmobile 1958 Massey Harris Pony 1951 Wife Killingworth, Connecticut May those who love us, love us, any of those who do not love us, may God turn their hearts. And if God is unable to turn their hearts, may he turn their ankles so we may know them by their limping. A man who works with his hands is a laborer; a man who works with his hands and his brain is a craftsman; but a man who works with his hands and his brain and his heart is an artist.

03-08-2004, 11:17 PM	#5
ajbirken Registered User Join Date: Nov 2002 Location: raleigh, NC Posts: 60	OUCH! I was afraid of that. No good deed goes unpunished. Can i use WD-40 or PB blaster now that the oiling system is "open"? __________________ 1971 GMC Jimmy 350/350/205/D60/14bolt on 38's 1984 M1008 CUCV 6.2/TH400/208/D60/14bolt on 36's 1991 W250 5.9/G360/205/D60/D70 on 33's (tow-rig) Lotsa Full Size Jeeps (J10/J20)! Adam Last edited by ajbirken; 03-08-2004 at 11:20 PM.

03-09-2004, 02:53 AM	#6
angelsairman Future Owner Join Date: Jul 2003 Location: Grand Forks AFB, ND Posts: 151	if you were going to use WD-40 to help loosen it up id go with Mystery Oil instead, let it sit on it for awhile and it will work its self in to the threads and hopefully loosen it up, also works great to help unsieze lawn mower engines HAHAHAHA __________________ Its not the end result that counts most...its the journey along the way that's most rewarding My truck doesn't leak, it just marks it's territory

03-09-2004, 03:11 AM	#7
ajbirken Registered User Join Date: Nov 2002 Location: raleigh, NC Posts: 60	Thanks for all the replies. The mystery oil stuff is a good idea. __________________ 1971 GMC Jimmy 350/350/205/D60/14bolt on 38's 1984 M1008 CUCV 6.2/TH400/208/D60/14bolt on 36's 1991 W250 5.9/G360/205/D60/D70 on 33's (tow-rig) Lotsa Full Size Jeeps (J10/J20)! Adam



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