My oil pressure has dropped
11-30-2009, 05:40 PM
#1
Registered User
Thread Starter
Join Date: Nov 2009
Location: Qatar
Posts: 5
Likes: 0
Received 0 Likes
on
0 Posts
My oil pressure has dropped Hi,
I am very happy for join you
1st I apologize for my English
I have a problem my oil pressure has dropped ( very low ) and i was wondering what i should do, I've been told to switch it from 0W40 to 10W30 and see if that helps any, I replaced the oil pump as the same one that it has before (malling Hv ) but the problem still remain, tomorrow I will change the pressure sensor and will see what will happen , any input anybody may have would be greatly apriciated.
I am very happy for join you
1st I apologize for my English
I have a problem my oil pressure has dropped ( very low ) and i was wondering what i should do, I've been told to switch it from 0W40 to 10W30 and see if that helps any, I replaced the oil pump as the same one that it has before (malling Hv ) but the problem still remain, tomorrow I will change the pressure sensor and will see what will happen , any input anybody may have would be greatly apriciated.
Last edited by احمد العمادي; 12-03-2009 at 04:07 AM.
11-30-2009, 05:46 PM
#2
ahmed hi, ur nick name made my day 
.
i see ur sig empty, what car/engine are we dealing with.
what have u done to ur engine lately ? most of the time its the pressure sensor u should have dont the pressure sensor before u thorw money on the oil pump.
.i see ur sig empty, what car/engine are we dealing with.
what have u done to ur engine lately ? most of the time its the pressure sensor u should have dont the pressure sensor before u thorw money on the oil pump.
11-30-2009, 09:13 PM
#3
Throw a mechanical guage on the engine to see what you actually have. That will rule if you have an engine issue or just a sensor issue.
If it's a sensor issue, just swap the sending unit for a new one.
Really though, it sounds as if the bearings might be washed out. You may be in for a rebuild. Doesn't really matter what engine you have. They all share the same mechanical aspects. But knowing which engie you have may help determine where the problem lies in the engine if it is mechanical.
If it's a sensor issue, just swap the sending unit for a new one.
Really though, it sounds as if the bearings might be washed out. You may be in for a rebuild. Doesn't really matter what engine you have. They all share the same mechanical aspects. But knowing which engie you have may help determine where the problem lies in the engine if it is mechanical.
12-01-2009, 04:53 PM
#5
Registered User
Thread Starter
Join Date: Nov 2009
Location: Qatar
Posts: 5
Likes: 0
Received 0 Likes
on
0 Posts
LSX 454 only 3000 miles . Drove the car for 2 days and oil pressure was slowly decreasing. Got down to about 8 psi hot at idle on a mechanical gauge so pulled and there is no metal shavings in the oil id
but in first start when the engine is cold the pressure is around 32 psi
12-01-2009, 05:19 PM
#6
Registered User
Thread Starter
Join Date: Nov 2009
Location: Qatar
Posts: 5
Likes: 0
Received 0 Likes
on
0 Posts
Throw a mechanical guage on the engine to see what you actually have. That will rule if you have an engine issue or just a sensor issue.
If it's a sensor issue, just swap the sending unit for a new one.
Really though, it sounds as if the bearings might be washed out. You may be in for a rebuild. Doesn't really matter what engine you have. They all share the same mechanical aspects. But knowing which engie you have may help determine where the problem lies in the engine if it is mechanical.
If it's a sensor issue, just swap the sending unit for a new one.
Really though, it sounds as if the bearings might be washed out. You may be in for a rebuild. Doesn't really matter what engine you have. They all share the same mechanical aspects. But knowing which engie you have may help determine where the problem lies in the engine if it is mechanical.
The engine is not making any weird noises or behavior the pressure rises with rpm (hot & cold) but when the engine is hot and the P is low I feel there is tiny vibration and something make engine not going smooth after 4000 rpm
very hard to notice but because it my daily drive car I can do.
Trending Topics
12-01-2009, 06:06 PM
#8
TECH Enthusiast
iTrader: (1)
Join Date: Oct 2009
Location: auburn ma
Posts: 697
Likes: 0
Received 0 Likes
on
0 Posts
check the connection from the pick up tube to the oil pump.. if the orings are pushed out or not sealing could be sucking air , may have to oblong the pick up tube mounting holes to get the tube to seat in the oil pump better .
12-03-2009, 04:51 AM
#14
Registered User
Thread Starter
Join Date: Nov 2009
Location: Qatar
Posts: 5
Likes: 0
Received 0 Likes
on
0 Posts
There now difference reading after changing the oil from 0w40 to 20w40
with 20w40 presser is little higher when (cold & hot) and it not dropping fast but the problem stile there
what make my crazy is there is no weird noises in the engine
what i have done so far
oil pump + O ring
Oil + oil filter
Oil presser sensor
Checked the connection from the pick up tube to the oil pump
12-03-2009, 04:15 PM
#17
That makes sence. The cam bearings have to line up with the oil jurnals in the block to properly oil the cam. And the cam oil passages feed the LSx engine oil pressure switch.
12-04-2009, 06:34 PM
#20
Crank feeds the cam. I will have to check the oil routing again. But I am sure that if there is an issue with the cam not getting proper oil pressure, the oil sensor will have a bad reading.