Too much oil pressure? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ol'blu72 · 07-01-2009, 08:53 PM

Did a lot of work on the old girl this week. On my neighbors recomendation I installed a high volume oil pump while I had my pan off. Now I have too much oil pressure. Is this bad? What could happen with too much press and how likley is it to happen. It is at the top of the guage at idle

Either way I can't fix it for a while the wife is done with me working on the truck. Am I going to blow somthing up? Cause I am gonna drive her.

**68 Stepside** · 07-01-2009, 09:22 PM

I think with a high volume pump and a stock pan you might suck the pan dry if you really get on it hard. I might be wrong, but I'm pretty sure I've heard that before.

ll____b0t____ll · 07-01-2009, 09:29 PM

Ide start by getting a oil pressure gauge thats full sweep and seeing exactly what numbers your hitting .
My 400 sb ran a high volume pump and stock pan and never had a that problem but 50lb pressure was about as low as it went and it would idle at around 75lb until warm I always kept it under 82 lbs.

**GruntMoanCough** · 07-01-2009, 09:35 PM

Just a thought (rare, I know), don't those high volume pumps come with 2 different pressure springs? (wait..... that's a question)

ChevLoRay · 07-01-2009, 10:28 PM

Okay, for each 1000 RPM's, you need 10 lbs of pressure. Now, my school bus will be sitting at almost 0PSI at an idle. That is a worrisome thing, for me. However, I've been told that it has a high volume, low pressure oil pump. I reckon that's a good thing, because I have over 70K miles on it w/o any oiling problems.

Sammy · 07-02-2009, 12:01 AM

I can't see how with a high volume oil pump you would starve it on oil. All the oil is running thru the engine. Now if you were doing serious stock car stuff, or drag racing, then you would add a larger oil pan capacity. Just can't see anyone on the street doing damage with a high volume pump on a street machine even under extreme conditions.

Jacfourteen · 07-02-2009, 01:48 AM

Quote:

Originally Posted by Sammy

I can't see how with a high volume oil pump you would starve it on oil. All the oil is running thru the engine. Now if you were doing serious stock car stuff, or drag racing, then you would add a larger oil pan capacity. Just can't see anyone on the street doing damage with a high volume pump on a street machine even under extreme conditions.

I'm with you on this one, there is only so much oil that the passages can hold...the faster you put it in, the faster it runs into the pan.

ol'blu72 · 07-02-2009, 05:49 AM

So do I have anything to worry about. What oil press are you guys running? any problems?

gator2511 · 07-02-2009, 07:36 AM

I've been running a high pressure pump with a stock pan for two years now with no problems.

Jim_PA · 07-02-2009, 08:02 AM

Quote:

Originally Posted by ol'blu72

Did a lot of work on the old girl this week. On my neighbors recomendation I installed a high volume oil pump while I had my pan off. Now I have too much oil pressure. Is this bad? What could happen with too much press and how likley is it to happen. It is at the top of the guage at idle

Either way I can't fix it for a while the wife is done with me working on the truck. Am I going to blow somthing up? Cause I am gonna drive her.

When I fire mine up, it idles at the "red line" of the oil pressure gauge for a while. After driving for a while, it will settle down at idle to about the half-way point.

ol'blu72 · 07-02-2009, 08:14 AM

Quote:

Originally Posted by gator2511

I've been running a high pressure pump with a stock pan for two years now with no problems.

What kind of pressures are you getting?

07-01-2009, 08:53 PM	#1
ol'blu72 Registered User Join Date: Jun 2009 Location: Hampton Roads VA Posts: 333	Too much oil pressure? Did a lot of work on the old girl this week. On my neighbors recomendation I installed a high volume oil pump while I had my pan off. Now I have too much oil pressure. Is this bad? What could happen with too much press and how likley is it to happen. It is at the top of the guage at idle Either way I can't fix it for a while the wife is done with me working on the truck. Am I going to blow somthing up? Cause I am gonna drive her. __________________ Brad 72 Blazer CST 350/350/205

07-01-2009, 09:22 PM	#2
68 Stepside huh? Join Date: May 2000 Location: Washington, Illinois Posts: 5,692	Re: Too much oil pressure? I think with a high volume pump and a stock pan you might suck the pan dry if you really get on it hard. I might be wrong, but I'm pretty sure I've heard that before. __________________ Someday when I'm lonely, Wishing you weren't so far away, Then I will remember Things we said today. RIP El Jay

07-01-2009, 09:29 PM	#3
ll____b0t____ll Registered User Join Date: Dec 2008 Location: Cody Wyoming Posts: 238	Re: Too much oil pressure? Ide start by getting a oil pressure gauge thats full sweep and seeing exactly what numbers your hitting . My 400 sb ran a high volume pump and stock pan and never had a that problem but 50lb pressure was about as low as it went and it would idle at around 75lb until warm I always kept it under 82 lbs.

07-01-2009, 09:35 PM	#4
GruntMoanCough Registered User Join Date: May 2009 Location: Pemberton, BC Posts: 1,075	Re: Too much oil pressure? Just a thought (rare, I know), don't those high volume pumps come with 2 different pressure springs? (wait..... that's a question) __________________ My goal in life is to be as good a person as my dog already thinks I am - Unknown

07-01-2009, 10:28 PM	#5
ChevLoRay Old Skool Club Join Date: Jun 2001 Location: Benton, AR "The Heart of Arkansas" Posts: 10,880	Re: Too much oil pressure? Okay, for each 1000 RPM's, you need 10 lbs of pressure. Now, my school bus will be sitting at almost 0PSI at an idle. That is a worrisome thing, for me. However, I've been told that it has a high volume, low pressure oil pump. I reckon that's a good thing, because I have over 70K miles on it w/o any oiling problems. __________________ Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was.

07-02-2009, 12:01 AM	#6
Sammy Registered User Join Date: Apr 2000 Location: Bonne Terre, Mo Posts: 3,005	Re: Too much oil pressure? I can't see how with a high volume oil pump you would starve it on oil. All the oil is running thru the engine. Now if you were doing serious stock car stuff, or drag racing, then you would add a larger oil pan capacity. Just can't see anyone on the street doing damage with a high volume pump on a street machine even under extreme conditions. __________________ '69 Chevy Long Fleet & '71 GMC Short Step & Project "ODD BALL" "You can wash a pig, soak it in most expensive perfume. In the end it is still just a pig." ODD BALL build thread http://67-72chevytrucks.com/vboard/s...d.php?t=478629"

07-02-2009, 05:49 AM	#8
ol'blu72 Registered User Join Date: Jun 2009 Location: Hampton Roads VA Posts: 333	Re: Too much oil pressure? So do I have anything to worry about. What oil press are you guys running? any problems? __________________ Brad 72 Blazer CST 350/350/205

07-02-2009, 07:36 AM	#9
gator2511 Registered User Join Date: Mar 2005 Location: tampa florida Posts: 776	Re: Too much oil pressure? I've been running a high pressure pump with a stock pan for two years now with no problems.



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