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My chevy engine is knocking,i already changed oil pump and shaft but now yheres no water pressure?

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  • Chevrolet Master
  • 14,036 Answers

SOUND LIKE WORN OUT MAIN BEARINGS.THAT WILL CAUSE LOW OIL PRESSURE

Posted on Aug 06, 2010

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My 2000 chevy blazer is knocking, but from the front of the motor, has good oil pressure. changed the oil & there was very very minute dirt/shavings. Transmission has been acting up going into 2


Check the water pump in the front of your engine for bearings going out. Have your tranny fluid changed & have the 2 shift selonods replaced, if the tranny is OK.

Feb 15, 2015 | 2000 Chevrolet Blazer

1 Answer

What causes no oil pressure in a 3.9 dodge ram motor, if the oil pump is brand new?


did you check the oil pressure senser that controls the gauge? on my engine it is located at the rear of the engine near the distrubiter, also check the shaft that drives the oil pump

Aug 09, 2014 | 2001 Dodge Ram 1500 Truck 2WD

2 Answers

Bearings on crank shaft have to do with oil pressure


No that is not exactly true, worn main engine crank bearings will drop the oil pressure as it leaks out the gap, but worn oil pumps will also cause the bearings to wear and then that makes the oil press drop problem worse. The bottom line here is that if you have an engine knock it is to late, the engine must be rebuilt and the oil pump is always replaced at that time.

May 29, 2012 | 1999 Chevrolet Silverado 1500

1 Answer

05 CHEVY CLASSIC , 135000 MI. OIL PUMP GONE BAD ALREADY ??? IS IT HARR TO CHANGE ???


Hello, seen some of these trucks, that the oil pressure relief valve sticks in the oil pump causinga loss oil pressure. this does require the oil pump to be replaced. the oil pump is mounted behind the frot engine cover. the oil pump replacement requires, the front engine cover and the oil pan to be removed.

Jul 10, 2011 | Chevrolet Classic Cars & Trucks

1 Answer

No oil pressure and a knocking that got


Sounds like the oil pump intermediate shaft might have slipped out of place when the distributor was removed and replaced. The intermediate shaft is held to the oil pump by a nylon sleeve that can and sometimes does break, which will allow it to slip out of place. Pull the distributor back out and look down the hole with a flashlight, you should see the top of the shaft, it looks like the head of a regular flat tip screw, if you do not see this the shaft is out of place and the only fix is to remove the oil pan and reinstall it. As far as engine damage, if you only ran the engine for a short time and at low rpms you might be alright, if you drove it down the road or ran it at high rpms then there is probably damage to the bearings, and the knock will not go away.

Apr 08, 2010 | 1990 Chevrolet Suburban

4 Answers

Oil pressure low when idling. When running engine


first check the oil level if its good then change the oil if you hav'nt done so all ready and add some LUCAS oil stablizer this may help alot if not then the oil pump is most likley going bad and needs to be replced before the engine lacks oil and cause the engine to seize.

Mar 14, 2010 | 2000 Chevrolet S-10

1 Answer

Engine knock hard over 2500 rpm


Does the oil light come on or the knock occur during the engine warm up after a cold start?
There could be a couple of problems causing the issue. You could have an oil pressure pump or pump pressure regulator sticking. I would have a mechanical oil pressure gauge installed and verify oil pressure at idle and 2500 rpms to make sure oil pressure is in normal ranges.
You could also have excessive piston rod bearing, crankshaft bearing or cam shaft bearing wear that will cause oil pressure to drop too low to prevent the rod knock your hearing at 2500 rpm.
You said a knock and not a ticking noise,so I don't believe a lifter is the issue at 2500 rpm.
Start with the oil pressure check and go from there.
Let me know.
Regards,

Aug 22, 2009 | 1996 Dodge Stratus

2 Answers

I have a 1993 Chevy Truck that every once in a while will get a knocking sound from the engine at normal operating temperature. During this time the oil pressure will drop and it feels like the engine is...


One of two things is happening, either the oil pump is starting to go or the lifters are sticking. A small shot of water while the engine is running into the carb will take care of it believe it or not. Use a spray bottle or just drip very small amounts.It's like steam cleaning your engine.

Aug 18, 2009 | 1993 Chevrolet K1500

1 Answer

Oil light flashin with engine knock


To accurately check oil pressure, you need a mechanical pressure gauge and feed line. To use, remove the factory pressure sending unit and attach gauge.
Likely if the engine is already knocking, the problem is already there and the oil pressure light is telling you that (knock is either rod bearing, main bearing or lifter) Oil pumps do not generally fail. the pump gets oil before any other component is the last to not get oil. Pressure loss at a worn bearing causes pressure drop that turns on light (unless you don't have sufficient oil in the pan.)

Mar 22, 2009 | BMW 3 Series Cars & Trucks

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