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Username Post: oil pressure drop when coming to a stop        (Topic#360214)
Larry E 
Contributor
Posts: 132
Larry E
Loc: Los Angeles
Reg: 09-15-16
03-19-20 02:33 PM - Post#2788988    

Does anyone know why my oil pressure drops when I come to a stop ?

1950 Chevy Styleline Deluxe 235


 


Larry E 
Contributor
Posts: 132
Larry E
Loc: Los Angeles
Reg: 09-15-16
03-19-20 02:33 PM - Post#2788989    
    In response to Larry E

I have a 1969 C10. 350 engine

1950 Chevy Styleline Deluxe 235


 
grumpyvette 
Senior Chevytalk Moderator -- Performance Subject Matter Expert --
Posts: 17506
grumpyvette
Age: 72
Loc: FLORIDA USA
Reg: 03-16-01
03-19-20 03:06 PM - Post#2788991    
    In response to Larry E

are you stating that at idle you have far lower oil pressure?
are you suggesting that as rpms increase so does the oil pressure?
have you checked your dipstick/oil level?
have you done an oil/filter change recently?

IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!


 
Larry E 
Contributor
Posts: 132
Larry E
Loc: Los Angeles
Reg: 09-15-16
03-19-20 03:59 PM - Post#2788998    
    In response to grumpyvette

Yes, at idle the pressure is low, about 10
Yes, as I increase speed the pressure goes up to 50
I checked the oil an it looks full.
I will change the oil and filter this weekend and let you know if it makes a difference. Thanks

1950 Chevy Styleline Deluxe 235


 
grumpyvette 
Senior Chevytalk Moderator -- Performance Subject Matter Expert --
Posts: 17506
grumpyvette
Age: 72
Loc: FLORIDA USA
Reg: 03-16-01
03-19-20 06:01 PM - Post#2789006    
    In response to Larry E

oil pressure is the result of the resistance to oil flow, the low pressure tends to indicate either worn bearings or a well worn oil pump, but could be the result of a loose oil passage plug or loose oil pump pick-up, or defective oil filter.
the bandaid approach would be to swap to a high volume oil pump but that would only temporarily tend too hide the issue not cure it.
in an ideal world , you do a engine refresh with new rings, bearings and gaskets after carefully inspecting and measuring the components of the engine




http://garage.grumpysperformance.com/index.php?thr...

http://garage.grumpysperformance.com/index.php?thr...

IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!


Edited by grumpyvette on 03-19-20 06:03 PM. Reason for edit: No reason given.

 
bobb 
Super Senior Member
Posts: 5630

Loc: paradise
Reg: 09-05-03
03-22-20 02:24 AM - Post#2789204    
    In response to Larry E

is this a recent problem? is your gauge correct? i would suggest an oil test. napa has a kit and its cheap.

70 L camino, grampa engine, g-force 5 spd, road rage suspension. Pray first before all else fails.


 
Larry E 
Contributor
Posts: 132
Larry E
Loc: Los Angeles
Reg: 09-15-16
06-14-20 06:39 PM - Post#2796370    
    In response to bobb

Does anyone know If I can drop the oil pan without lifting the engine ?
Theres not much space between the oil pan and cross member.

1950 Chevy Styleline Deluxe 235


 
Larry E 
Contributor
Posts: 132
Larry E
Loc: Los Angeles
Reg: 09-15-16
06-14-20 06:39 PM - Post#2796371    
    In response to Larry E

I have a 1969 C10. 350 engine

1950 Chevy Styleline Deluxe 235


 
JimKshortstep4x4 
Chevytalk Moderator & "16th Year" Silver Supporting Member
Posts: 5116
JimKshortstep4x4
Loc: Muskegon, MI, USA
Reg: 03-28-02
06-18-20 04:59 AM - Post#2796629    
    In response to Larry E

I have always lifted the engine up as getting the pan to clear the crankshaft has not worked. Also, the fan shroud has to be taken care of.

Jim

65 Impala SS, 400sbc, Muncie M-22
66 Impala SS, 396, TH 400
69 El Camino, 350, TH 350
71 Short bed stepside 4x4, 350/TH 350
71 Snow plow, 4x4, 350, TH 350
72 GMC Shortbed, stepside, 427/TH 400


 
doubleE 
Valued Contributor
Posts: 3875

Loc: Eagan MN
Reg: 06-02-03
06-18-20 09:21 AM - Post#2796655    
    In response to Larry E

Just did this on my 72 C10 with the 307 SBC to fix leaking pan gasket with a new one-piece pan gasket. I first pulled the bolts from the front motor mounts and using a floor jack, raised the engine maybe 1 to 1 1/2 inches (until the fan hit the shroud). When I wasn't able to get the pan out I went to U-Tube and found a video that explained turning the crank to a certain position that allowed me to slip the pan out. Don't remember what that was but a search on U-Tube should find it. (Supposedly this works without raising the engine).

Must say the Fel Pro one piece pan gasket was really slick - no leaks!!!

Double E

Proud owner of My Blue 62 Impala SS


 
19Chevy50 
Newbie
Posts: 24
19Chevy50
Age: 59
Loc: Wichita, KS
Reg: 06-21-19
06-19-20 10:37 AM - Post#2796710    
    In response to doubleE

I have a 350 4 bolt main with a similar problem oil pressure at idle is 20 psi and move up to 45 to 50 while moving. Engine only has about 1500 miles on rebuild. What would be a suggested plan to fix this issue.



 


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