97 Lt1 oil pressure - LS1TECH



LT1-LT4 Modifications 1993-97 Gen II Small Block V8

97 Lt1 oil pressure

Reply
 
Thread Tools Search this Thread
Old 10-09-2010, 09:30 PM   #1
Staging Lane
Thread Starter
iTrader: (2)
 
wm2002Z28's Avatar
 
Join Date: Feb 2009
Location: Dallas,TX
Posts: 57
Default 97 Lt1 oil pressure

Ok so i have a friend who just bought a lt1 and the oil pressure is really low. The car drive good and response good. what do y'all think is going on?
wm2002Z28 is offline   Reply With Quote
Old 10-09-2010, 09:31 PM   #2
TECH Addict
iTrader: (15)
 
bigj2717's Avatar
 
Join Date: Sep 2005
Location: San Antonio, TX
Posts: 2,064
Default

How low is really low?
bigj2717 is offline   Reply With Quote
Old 10-09-2010, 09:34 PM   #3
Staging Lane
Thread Starter
iTrader: (2)
 
wm2002Z28's Avatar
 
Join Date: Feb 2009
Location: Dallas,TX
Posts: 57
Default

It's a on the last line before the red mark
wm2002Z28 is offline   Reply With Quote
Old 10-09-2010, 09:35 PM   #4
Staging Lane
Thread Starter
iTrader: (2)
 
wm2002Z28's Avatar
 
Join Date: Feb 2009
Location: Dallas,TX
Posts: 57
Default

When you drive it it shoots up to normal
wm2002Z28 is offline   Reply With Quote
Old 10-09-2010, 09:39 PM   #5
TECH Addict
iTrader: (15)
 
bigj2717's Avatar
 
Join Date: Sep 2005
Location: San Antonio, TX
Posts: 2,064
Default

Sounds normal. Lt1s usually run lower pressure then normal SBC. Mine with the stock pump at idle was usually around 15. GM specs atually say 6psi at warm idle at the lowest is fine

Last edited by bigj2717; 10-09-2010 at 09:44 PM.
bigj2717 is offline   Reply With Quote
Old 10-09-2010, 09:45 PM   #6
Staging Lane
Thread Starter
iTrader: (2)
 
wm2002Z28's Avatar
 
Join Date: Feb 2009
Location: Dallas,TX
Posts: 57
Default

Yeah that's what he said. Because he had a 96 lt1 before and he said it did the same thing. But thanks for letting me know i just thought it should have been higher.
wm2002Z28 is offline   Reply With Quote
Old 10-10-2010, 10:22 AM   #7
TECH Enthusiast
iTrader: (1)
 
Join Date: Jan 2004
Posts: 648
Default

run higher weight oil. that sounds too low. how much mileage does he have?
License2Ill is offline   Reply With Quote
Old 10-10-2010, 11:00 AM   #8
Staging Lane
Thread Starter
iTrader: (2)
 
wm2002Z28's Avatar
 
Join Date: Feb 2009
Location: Dallas,TX
Posts: 57
Default

[QUOTE=License2Ill;13971164]run higher weight oil. that sounds too low. how much mileage does he have?[/QUOTE

He has around 134,xxxx
wm2002Z28 is offline   Reply With Quote
Old 10-10-2010, 01:50 PM   #9
TECH Senior Member
iTrader: (2)
 
RamAir95TA's Avatar
 
Join Date: May 2005
Location: South Jersey
Posts: 9,488
Default

As mentioned, GM spec (not people's opinions or people who are proud of their unnecessarily high oil pressure at idle in their signature) is minimum 6psi at idle and 10psi extra for every 1,000RPM.
RamAir95TA is offline   Reply With Quote
Old 10-11-2010, 12:59 AM   #10
TECH Enthusiast
iTrader: (1)
 
Join Date: Jan 2004
Posts: 648
Default

Quote:
Originally Posted by RamAir95TA View Post
As mentioned, GM spec (not people's opinions or people who are proud of their unnecessarily high oil pressure at idle in their signature) is minimum 6psi at idle and 10psi extra for every 1,000RPM.
Funny thing is some opinions are more valid and reasonable than others.
Lets take the fact that you find higher oil pressure at idle as "unnecessary" or nothing to be proud(given my mileage)as an example. I think the more applicable cliche about opinions resembling excremental holes is more due in YOUR case.

Here's a link for the OP...checkout post #16 for another more real life "opinion" and not just some textbook "spec" likely out of a haynes manual:
http://www.fullsizechevy.com/showthr...l-Oil-pressure

Do your friend a favor and have him try to up that pressure some. Especially if he plans to get those revs up with even an occasional weeked thrashing.

I personally woulnd't fugg around with anything @5/6psi("gm spec" lol or not)thats where i might swap out the oil pump to a high PRessure NOT volume. Thats if I really want to put off rebuilding usually its good for an additional 50K before the pressure heads south again. It just buys you some time but wear has set in on the clearences and bearings nothing can change that but a rebuild.
Tight tolerences like when newly rebuilt will always give the best oil pressure but age and maintanence and level of use or abuse in many of our cases take their toll on a case by case basis. Its possible a past owner did not take the absolute best care of it or simply was a weekend warrior and never missed a weekend at the local street thrashing.
Either way thats NOT let me POUND on it pressure......that's ease back on thos neck snapping rev climbs time.
License2Ill is offline   Reply With Quote
Old 10-11-2010, 08:05 AM   #11
TECH Senior Member
iTrader: (2)
 
RamAir95TA's Avatar
 
Join Date: May 2005
Location: South Jersey
Posts: 9,488
Default

The OP says his pressure is on the last line of the gauge. Assuming his gauge is accurate, that's 20psi. Assuming post #16 is gospel (), he says that "anything much below 20 PSI and you are shortening the life of the engine."

...funny how that works out.

He ALSO goes on to say that those "lower pressures cause the internals to get hotter, which breaks down conventional oils." Obviously if you run conventional oils this may have an inkling of truth, but being that most LT1 owners use synthetic oil this is far less of a concern.

I didn't say that 6psi is a recommended pressure, I said that is GM spec. This is NOT what is in a Haynes manual - this is coming from the FSM, from the engineers who designed the motor.

I never said having high oil pressure at idle is a negative, did I? I said that it is unnecessary. One should not automatically assume that 20psi (or even 10 or 15psi) is a bad thing and higher oil pressure is needed simply because it is not.
RamAir95TA is offline   Reply With Quote
Old 10-11-2010, 10:27 AM   #12
Village Troll
iTrader: (2)
 
SS RRR's Avatar
 
Join Date: Oct 2002
Location: Jackstandican
Posts: 8,301
Default

Another "real lyfe, y0" thing to do is get a mechanical gauge to see if the stock gauge is accurate. The pressure sender has been known to not be completely spot on.
SS RRR is offline   Reply With Quote
Old 10-11-2010, 10:55 AM   #13
TECH Enthusiast
iTrader: (1)
 
Join Date: Jan 2004
Posts: 648
Default

Whatever you do don't mount a mechanical oil pressure gauge inside the car routing a plastic line that carries the oil to the gauge.....you'll find a few guys on here who love to do that and tie it down using banjo string.....later the string comes apart and they get oil squirting in their eyes and all over the interior.......hahhaha.
Your stock electric will work just fine...you definitely could opt to check it out mechanicaly tho just to confirm.

If your on the 20psi mark your fine and thats good for that mileage.....
Some guage clusters have little lines dividing that red mark your talking about landing you under 10psi......so if your under 10....try to up it.

Y'all come back now ya hear!
License2Ill is offline   Reply With Quote
Old 10-12-2010, 12:35 AM   #14
TECH Addict
iTrader: (1)
 
jaycenk's Avatar
 
Join Date: Jun 2009
Location: Holiday, FL
Posts: 2,201
Default

Quote:
Originally Posted by SS RRR View Post
Another "real lyfe, y0" thing to do is get a mechanical gauge to see if the stock gauge is accurate. The pressure sender has been known to not be completely spot on.
x10 on that, the electricals are always off it seems. put a mechanical on it and see where it is really at. looking at an old gage is not helping. I have a 97 and if you watch the gage in the stock cluster close you can see it get stuck ever so slightly and then pop up to normal. My stock is off by 10lbs at idle and 5 at it's highest point of 60.
jaycenk is offline   Reply With Quote
Old 10-12-2010, 09:03 PM   #15
Launching!
iTrader: (2)
 
RogueLT1's Avatar
 
Join Date: Jul 2010
Location: Ann Arbor, MI
Posts: 210
Default

i asked the same question when i first got my LT1. everyone told me it was normal.

Ram, why does everyone feel the urge to argue with you??? most posts i see with you have someone trying to prove what you said wrong...
RogueLT1 is offline   Reply With Quote
Old 10-13-2010, 02:33 AM   #16
TECH Senior Member
iTrader: (2)
 
RamAir95TA's Avatar
 
Join Date: May 2005
Location: South Jersey
Posts: 9,488
Default

Quote:
Originally Posted by RogueLT1 View Post
i asked the same question when i first got my LT1. everyone told me it was normal.

Ram, why does everyone feel the urge to argue with you??? most posts i see with you have someone trying to prove what you said wrong...
I dunno. Opinions are like ******** I guess.
RamAir95TA is offline   Reply With Quote
Old 10-19-2010, 08:49 AM   #17
Launching!
iTrader: (5)
 
Join Date: Aug 2010
Location: Kansas
Posts: 205
Default

If its only low at idle then mine has done the same thing. When its cold its shoots up but when its warm it stays around the 1/4 mark then when I give it any rpms it goes to the middle line
katz_2003 is offline   Reply With Quote
Old 10-19-2010, 09:57 AM   #18
TECH Apprentice
iTrader: (5)
 
Join Date: Jan 2007
Location: Hays
Posts: 372
Default

My stock motors oil pressure was 60 psi cold and 40 psi while driving. At a warm idle it was at 20 psi.
~BuMps AloT~ is offline   Reply With Quote
Old 10-19-2010, 10:25 AM   #19
Staging Lane
 
Join Date: Aug 2010
Location: NW Arkansas
Posts: 63
Default

I believe mine sits just under halfway on the gauge at idle and goes over that with rev

Of course I have no idea what that means though
bds001 is offline   Reply With Quote
Old 10-19-2010, 12:58 PM   #20
TECH Fanatic
iTrader: (12)
 
lethal bird's Avatar
 
Join Date: Jul 2009
Location: Dekalb, Ms
Posts: 1,828
Default

ram i completely agree with you times ten.
lethal bird is offline   Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Lt1 low oil pressure Michael Covarrubias LT1-LT4 Modifications 4 04-24-2016 04:28 AM
Will changing the oil pressure sending unit/switch help my low oil pressure? sqjj Generation III Internal Engine 1 02-25-2016 09:30 PM
94 lt1 low oil pressure and tapping noise Bbranderson LT1-LT4 Modifications 5 06-10-2015 10:40 AM
raising oil pressure ElkySS LT1-LT4 Modifications 18 10-17-2008 09:37 AM
oil pressure Nads06111 LT1-LT4 Modifications 14 12-26-2006 06:50 AM


Tags
1997, 97, 97lt1, idle, low, lt1, normal, oil, people, pressure, problems, rebuild, route, spec, trans

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off



All times are GMT -5. The time now is 01:45 AM.