no oil pressure help!!!!!!!!! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72sleeper · 06-28-2002, 01:41 AM

i run synthetic and i just changed my oil but i haveno pressure my dad swears it ismy valves btut hes adjusted them a billion times and i dont know what to do when i brake the pressure goes all the way down it doesnt even want to idle in neutral ??????? anyhelp thanx

68 Suburban · 06-28-2002, 01:45 AM

I see no reason why synthetic oil would make your preasure go down. Could it be a bad oil filter? That happen to me once.

Ed ke6bnl · 06-28-2002, 03:36 AM

Quote:

Originally posted by 72sleeper
i run synthetic and i just changed my oil but i haveno pressure my dad swears it ismy valves btut hes adjusted them a billion times and i dont know what to do when i brake the pressure goes all the way down it doesnt even want to idle in neutral ??????? anyhelp thanx

Could be the sending unit mine was pluged and the reading was wrong. the wire could have come off also. Ed ke6bnl

**68 Stepside** · 06-28-2002, 04:27 AM

try replacing your oil filter, and I'd run regular dinosaur oil too, synthetic can drop pressure, I've seen it happen, and there might have been a topic on this board about it at one time as well.

TJ

Super Chevy · 06-28-2002, 06:30 AM

mabe try a thicker oil,for say 20w50,what do you have in it now?

Longhorn Man · 06-28-2002, 07:26 AM

I pretty much agree with the others here...go to dino oil, get some thicker stuff, check your guage, and plus... tell your dad that your valves will have absolutly zero effect on your oil bressure.

*Randy70C-10* · 06-28-2002, 07:59 AM

I agree with the bad filter, since it went down with the oil change, seems logical.

Longhorn Man · 06-28-2002, 08:19 AM

It is true, oil filters will stop up the oil system sometimes, not common, but it happens.

*racedvl* · 06-28-2002, 08:30 AM

Do what I do.......run a quart of 80w90!!!!

bigjimzlll · 06-28-2002, 10:32 AM

dont the oil filter mount have a by-pass? if it was a bad filter wouldnt the oil just by-pass the filter? I went with synthetic and it lowered the oil pressure, not as dramatically as you stated, but as it heated up it got worse. did you drop the pan? almost sounds like you moved the pickup.

Longhorn Man · 06-28-2002, 05:59 PM

Yes, filter mount does have a bypass...but they don't always work. Seen a couple do this.
Interesting tidbit of info...
In later model chevy small blocks, (not sure of the years thoguh) the by-pass is actually in the filter, and not the block.

runx68SWB · 06-28-2002, 06:35 PM

i too had my oil pressure drop a good 10-12 psi right after i put synthetic in the new engine but it is still well within acceptable readings.... i was thinking about going with 15W-50 next time instead of 10W-30.... i think it was thickness of the oil and not the fact that it is synthetic that dropped the pressure.... gave me a real good scare at first though.... always a heart stopper when you see that oil pressure gauge move downward LOL

72sleeper · 06-28-2002, 09:32 PM

im runnin 10w30 and it was fine at first and now itll stay high when i first drive itfor the day but after about 2 minutes its all the waydown and i know the gauge is fine cause i can feel it stutterin

06-28-2002, 01:41 AM	#1
72sleeper []D [] []v[] []D Join Date: Dec 2001 Location: h'vegas,TN,USA Posts: 78	no oil pressure help!!!!!!!!! i run synthetic and i just changed my oil but i haveno pressure my dad swears it ismy valves btut hes adjusted them a billion times and i dont know what to do when i brake the pressure goes all the way down it doesnt even want to idle in neutral ??????? anyhelp thanx __________________ Clint 72 c'10 350ci/400hp sleeper forever

06-28-2002, 01:45 AM	#2
68 Suburban Registered User Join Date: Oct 2000 Location: From Chicago, Live in Phoenix, AZ Posts: 6,802	I see no reason why synthetic oil would make your preasure go down. Could it be a bad oil filter? That happen to me once. __________________ Just sitting here contemplating contemplation. Last edited by 68 Suburban; 06-28-2002 at 01:49 AM.

06-28-2002, 04:27 AM	#4
68 Stepside huh? Join Date: May 2000 Location: Washington, Illinois Posts: 5,690	try replacing your oil filter, and I'd run regular dinosaur oil too, synthetic can drop pressure, I've seen it happen, and there might have been a topic on this board about it at one time as well. TJ __________________ Someday when I'm lonely, Wishing you weren't so far away, Then I will remember Things we said today. RIP El Jay

06-28-2002, 10:32 AM	#10
bigjimzlll Senior Member Join Date: Dec 2001 Location: Redding,CA...USA Posts: 4,736	dont the oil filter mount have a by-pass? if it was a bad filter wouldnt the oil just by-pass the filter? I went with synthetic and it lowered the oil pressure, not as dramatically as you stated, but as it heated up it got worse. did you drop the pan? almost sounds like you moved the pickup. __________________ It's called "drag racing" if they called it "tic..tic..WHAM!..BANG! F*&K!!!", they'd have to keep the magazines under the counter with the other men's publications click the clicky to join the site.... http://67-72chevytrucks.com/vboard/payments.php 67 lwb..first hotrod in 25 years..540 best ET is 9.45 @ 141.44 Anderson,CA

06-28-2002, 09:32 PM	#13
72sleeper []D [] []v[] []D Join Date: Dec 2001 Location: h'vegas,TN,USA Posts: 78	im runnin 10w30 and it was fine at first and now itll stay high when i first drive itfor the day but after about 2 minutes its all the waydown and i know the gauge is fine cause i can feel it stutterin __________________ Clint 72 c'10 350ci/400hp sleeper forever

06-28-2002, 06:30 AM	#5
Super Chevy Registered User Join Date: Feb 2001 Location: Ohio Posts: 1,025	mabe try a thicker oil,for say 20w50,what do you have in it now?

06-28-2002, 07:26 AM	#6
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	I pretty much agree with the others here...go to dino oil, get some thicker stuff, check your guage, and plus... tell your dad that your valves will have absolutly zero effect on your oil bressure.

06-28-2002, 07:59 AM	#7
Randy70C-10 Account Suspended Join Date: Mar 2001 Location: Virginia Beach, Va. U.S.A. Posts: 15,320	I agree with the bad filter, since it went down with the oil change, seems logical.

06-28-2002, 08:19 AM	#8
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	It is true, oil filters will stop up the oil system sometimes, not common, but it happens.

06-28-2002, 08:30 AM	#9
racedvl Account Suspended Join Date: Jan 2000 Location: Woodstock, IL Posts: 7,020	Do what I do.......run a quart of 80w90!!!!

06-28-2002, 05:59 PM	#11
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Yes, filter mount does have a bypass...but they don't always work. Seen a couple do this. Interesting tidbit of info... In later model chevy small blocks, (not sure of the years thoguh) the by-pass is actually in the filter, and not the block.

06-28-2002, 06:35 PM	#12
runx68SWB Registered User Join Date: May 2002 Location: pueblo, Co Posts: 31	i too had my oil pressure drop a good 10-12 psi right after i put synthetic in the new engine but it is still well within acceptable readings.... i was thinking about going with 15W-50 next time instead of 10W-30.... i think it was thickness of the oil and not the fact that it is synthetic that dropped the pressure.... gave me a real good scare at first though.... always a heart stopper when you see that oil pressure gauge move downward LOL

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