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

Splash4195 · 10-19-2010, 08:22 AM

Well I have a 98 Silverado Z71 EXT. It has the 5.7 liter in it with 103,000 on it now.

I was driving to work and the Oil Pressure is at 43 then when I brake the oil pressure drops down to about 30 or so when I'm not on the gas. Is this a known problem and should I bring it in to gix it?

BigBlocksRule · 10-19-2010, 10:38 AM

As long as you have 10psi at idle and about 10psi per 1000 rpms, you're fine.
The only thing you really need to watch on your engine is the intake manifold gaskets. They'll all eventually leak, question is whether they'll leak out onto the intake manifold/cylinder head or into the crankcase where the antifreeze breaks the oil down and you end up with an engine in the death throes of a rod knock. Fel-Pro makes a great replacement gasket, a lot of guys swap 'em out before the trouble starts and save themselves a lot of time and money.

Splash4195 · 10-19-2010, 12:24 PM

How hard are they to replace and also where do you get a Fel-Pro Replacement Gasket?

loudnlifted88 · 10-21-2010, 08:21 AM

i have changed them on two of my vehicles and there not to hard just have to remove the intake so however hard that seems to you and napa carries fel-pro gaskets but im sure there are other stores that have them

BigBlocksRule · 10-21-2010, 08:26 AM

I'll find the P/N and post it back here.
The good ones have metal compression stops to prevent over-tightening.
This is about a half-day job for most of us, mechanics in my area charge $250 plus parts which ain't bad. As long as you mark the distributor and don't turn the engine over, it's not hard to restab in the right place. That's about the only "technical" part of the swap, the rest is just wrenchin'.

clinebarger · 10-21-2010, 10:22 AM

Fel-Pro part# MS 98000 T.......Use this & you wont have problems again.

**bwood** · 10-21-2010, 07:48 PM

Quote:

Originally Posted by clinebarger

Fel-Pro part# MS 98000 T.......Use this & you wont have problems again.

What he said!!!!!!

10-19-2010, 08:22 AM	#1
Splash4195 Registered User Join Date: Jan 2010 Location: Minnesota Posts: 341	Oil Pressure Well I have a 98 Silverado Z71 EXT. It has the 5.7 liter in it with 103,000 on it now. I was driving to work and the Oil Pressure is at 43 then when I brake the oil pressure drops down to about 30 or so when I'm not on the gas. Is this a known problem and should I bring it in to gix it?

10-19-2010, 10:38 AM	#2
BigBlocksRule Registered User Join Date: Jun 2008 Location: Lubbock, TX Posts: 2,047	Re: Oil Pressure As long as you have 10psi at idle and about 10psi per 1000 rpms, you're fine. The only thing you really need to watch on your engine is the intake manifold gaskets. They'll all eventually leak, question is whether they'll leak out onto the intake manifold/cylinder head or into the crankcase where the antifreeze breaks the oil down and you end up with an engine in the death throes of a rod knock. Fel-Pro makes a great replacement gasket, a lot of guys swap 'em out before the trouble starts and save themselves a lot of time and money.

10-19-2010, 12:24 PM	#3
Splash4195 Registered User Join Date: Jan 2010 Location: Minnesota Posts: 341	Re: Oil Pressure How hard are they to replace and also where do you get a Fel-Pro Replacement Gasket?

10-21-2010, 08:21 AM	#4
loudnlifted88 Registered User Join Date: Jan 2010 Location: Wales,Maine Posts: 776	Re: Oil Pressure i have changed them on two of my vehicles and there not to hard just have to remove the intake so however hard that seems to you and napa carries fel-pro gaskets but im sure there are other stores that have them __________________ IM ONLY 18 AND LOVIN IT IF MUD AINT FLYIN YOU AINT TRYIN! 1badgmc- Just think. Someone worked hard to make it look that bad. 1988 chevy stepside 305 five speed Build thread http://67-72chevytrucks.com/vboard/s...d.php?t=383945 1994 GMC ext. cab short box 350 auto Build thread http://67-72chevytrucks.com/vboard/s...d.php?t=438873 1996 GMC 2500 ECSB 454 4l80e: build thread http://www.gmt400.com/forum/showthre...gmc-2500-build 1998 GMC K-1500 ECSB 305 auto partd truck 1999 GMC K2500 suburban 350 4x4 Dads project 1981 Corvette 350 auto Also Dads project 1989 Corvette 350 auto ^^ 1998 GMC K1500 ecsb 305 auto Brothers project

10-21-2010, 08:26 AM	#5
BigBlocksRule Registered User Join Date: Jun 2008 Location: Lubbock, TX Posts: 2,047	Re: Oil Pressure I'll find the P/N and post it back here. The good ones have metal compression stops to prevent over-tightening. This is about a half-day job for most of us, mechanics in my area charge $250 plus parts which ain't bad. As long as you mark the distributor and don't turn the engine over, it's not hard to restab in the right place. That's about the only "technical" part of the swap, the rest is just wrenchin'.

10-21-2010, 10:22 AM	#6
clinebarger Senior Member Join Date: May 2009 Location: Fort Worth, TX Posts: 6,370	Re: Oil Pressure Fel-Pro part# MS 98000 T.......Use this & you wont have problems again.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.