Question about 2000 Ford Expedition

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Would a loose valve cover bolt cause an oil pump to lose pressure

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No, it would only perhaps leak a bit of oil over the engine, you would lose oil but not pressure - (untill all the oil has leaked out).

Posted on Mar 19, 2011

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Not unless you were leaking huge amounts of oil. Low oil pressure is from worn clearances on the engine bearings or a weak or restricted oil pump.

Posted on Mar 19, 2011

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2 Answers

Losing power,tapping noise in valve cover. could it be the rocker arm and the cam?


could be bad lifters or loose rocker arms, bad oil pump or low on oil, possible bad cam (but not likely)
first thing i would do is check your oil real low oil will cause this
if oil is fine check for oil pressure if oil pressure is low assume bad oil pump
if oil prssure looks good look for bad lifters or loose rocker arms

Mar 06, 2011 | 1995 Nissan Pickup

3 Answers

How do i replace oil pump on a 2001 vw beetle?


Depends on what engine you have.
All engines require the pan removal first.
The 4 cylinder then has a pickup tube to remove, a windage tray, and then 2 bolts hold the pump on.
The 6 cylinder is more complex, with an output tube, more complex cover, etc.
Both have O rings to replace.

But I rarely see oil pumps go bad.
If you have low oil pressure, it could be the relief valve, but what I would suggest is screwing a mechanical gauge into one of the oil pressure switch fittings.
Worn connecting rod bearings are the most common cause of low oil pressure.
So if you have the pan off, check rod bearing looseness.
It is easy to replace rod bearings if no damage has been done to the crank yet.

Feb 24, 2011 | 2001 Volkswagen Beetle

2 Answers

How do you change the oil pump in a 1995 Lumina van with a 3.8?


REMOVAL

  1. Remove front cover.
  2. Remove oil filter adapter, pressure regulator valve and spring.
Fig. 16 Oil Pump & Housing 42162079

  1. Remove oil pump cover attaching screws, then the cover and gears, Fig. 16 .
INSPECTION

  1. Check pump cover and housing for cracks, scoring, porous or damaged casting, damaged threads or excessive wear or galling. Replace as required.
  2. Check pressure regulator valve for scoring, burrs or sticking in valve bore. Replace as required.
  3. Check pressure regulator valve spring for tension loss or bending, replace spring as required.
  4. Check gears for chipping galling or excessive wear, replace as required.
Fig. 17 Oil Pump Inner Gear Tip Clearance Inspection 42162080

  1. Measure oil pump inner gear tip clearance, Fig. 17 . Maximum clearance should be 0.006 inch.
Fig. 18 Oil Pump Outer Gear Diameter Clearance Inspection 42162081

  1. Measure oil pump outer gear diameter clearance, Fig. 18 . Clearance should be 0.008-0.015 inch.
Fig. 19 Oil Pump Gear End Clearance Inspection 42162082

  1. Measure oil pump gear end clearance with gear dropped in housing, FIG 19. Clearance should be 0.0010-0.0035 inch.
  2. Measure pressure regulator valve for valve to bore clearance of 0.0015-0.003 inch.
INSTALLATION

  1. Lubricate all gears with clean motor oil, then install gears in housing.
  2. Pack pump cavity with suitable petroleum jelly.
  3. Install pump cover and cover attaching screws. Tighten cover attaching screws to specifications.
  4. Install pressure regulator valve and spring.
  5. Install oil filter adapter using a new gasket, tighten oil filter adapter attaching bolts to specifications.
  6. Install front cover on engine. During front cover installation, ensure inner pump gear is properly engaged on crankshaft sprocket.

Jan 29, 2011 | Chevrolet Lumina APV Cars & Trucks

1 Answer

Tourqe specs for 2.8 liter motor.


Camshaft Sprocket: 15-20ftlbs
Camshaft Rear Cover: 6-9ftlbs
Torsional Dampener: 67-85ftlbs
Exhaust Manifold: 15-23ftlbs
Water Pump: 6-9ftlbs
Thermostat Housing: 15-23ftlbs
Intake Manifold: 23ftlbs
Timing Chain Dampener: 14-19ftlbs
Rocker Arm Cover: 6-9ftlbs
Rock Arm Nuts: 15-20ftlbs
Oil Pan: 15-23ftlbs(M8 Bolts) 6-9ftlbs(M6 Bolts)
Main Bearing Caps: 63-83ftlbs
Connecting Rod Main Cap: 34-40ftlbs
Cylinder Heads: 33ftlbs(+ an additional 1/4 Turn)
Engine Mounts: 34ftlbs
Oil Filter Adapter to Engine: 34ftlbs
Oil Filter Adapter Bolt: 63ftlbs
Oil Pressure Switch: 10ftlbs
Oil Pump Drive Bolt: 25ftlbs
Oil Pump Mounting Bolts: 30ftlbs
EGR Valve: 19ftlbs
EGR Tube Nut: 19ftlbs
Fuel Line Nuts: 17ftlbs
Fuel Rail Attaching Bolts: 88in.lbs
Fuel Rail Inlet Fitting: 35ftlbs
Fuel Rail Mounting Bracket: 28in.lbs
Fuel Rail Outlet Fitting: 30ftlbs
Fuel Pressure Connector: 88in.lbs
Fuel Pressure Regulator Bracket: 28in.lbs
Idle Air Control Valve: 30in.lbs
Idle Air/Vacuum Signal Housing: 30in.lbs
Intake Air Plenum Bolts: 16ftlbs
Thorottle Body Attaching Bolts: 18ftlbs
Throttle Position Sensor: 18in.lbs
Crankshaft Sensor: 71in.lbs
DIS Assembly to Block: 15-22ftlbs
Knock Sensor: 14ftlbs

Dec 15, 2010 | 1989 Chevrolet Celebrity

1 Answer

I need to replace the oil pump in my 2004 vw tdi sport


WELL ALL YOU HAVE TO DO IS.REMOVE OIL PAN.THEN MOUNTING BOLTS.AND LOWER THE PUMP FROM THE ENGINE.BOTTOM COVER AND DISASSEMBLE THE PUMP.THE PRESSURE RELIEF VALVE IS IN THE BOTTOM COVER.AFTER REASSEMBLING THE PUMP PRIME IT WITH OIL.AND INSTALL IT IN REVERSE ORDER OF REMOVAL OBSERVE THE FOLLOWING VALUES.OIL PUMP BOTTOM COVER BOLTS 84 INCH LBS.OIL PUMP SUCTION FOOT BOLTS 84 INCH LBS.OIL PUMP RETAINING BOLTS 18 FT LBS.

Apr 20, 2010 | 2004 Volkswagen Jetta

2 Answers

Oil leak


Oil leak can be attributed to several factors.
1. Gasket failure.
2. Uncontrolled Crank case pressure Failure.

RECOMENDATION:
Tighten both the valve cover and oil pan bolts.
Replace the Positive Crankcase Ventilation Valve and vacuum line.,

INFO: PCV
This is a valve causes a negative vacuum on the engine while its running, As to say if it had a leak in a valve cover it should not be leaking while its running, only when the engine it turned off.

Hope this tip guides you in the correct direction to solve this problem.

R/
David

Mar 10, 2010 | 1991 Dodge Daytona

1 Answer

I have a oil leak ever since i bought this car. I've changed the head gasket, front crank shaft seal, valve cover seal, and oil pan seal. Could using the old head bolts cause this? I've read that it...


NO if you have been using oil and loosing oil from all the seals and rocker cover and sump gasket then its caused by a thing called BACK PRESSURE,and that is caused by the piston rings worn, or broken top compression rings and a lip in the bore causing the ring gap to be about
6thou per inch causing the back pressure which in turn blowes oil out of all seals and gaskets ..
So take out the breather pipe from the rocker cover and let it blow into a paper towel for 2 minutes and if oil fumes come out the rings are worn.
Plus get a compression test on all cylinders and see if there down to 100 PSI or less.
The new head bolts should be replaced as they could be streached
threads, but not your problem this time
Let me know how you get on ASAP Ron

Nov 08, 2009 | 1993 Honda Civic 4 Door

3 Answers

Oil pressure light came on engine is knocking like no oil is


hi what what engine?
if it's knocking then most likely damage has been done to the bearings

May 27, 2009 | 1999 Oldsmobile Alero

1 Answer

Insufficient Flow problem with back pressure.


The 4 cyl does not have a PCV or EGR. There are a few reasons this could happen, drain plug loose, oil pan gaskets or bolts loose or broken, front cover gasket loose, crankshaft front or rear oil seal leaking, oil filter looseworn valve stem. Check all you fittings before checking these next three. Piston rings not installed right, piston and cylinders worn excessively, damaged oil pressure switch. I know this is long, but in my experience it is usually a loose bolt or fitting. Hope this helps

Mar 18, 2009 | 2000 Chevrolet Malibu

5 Answers

Losing Oil Pressure in Dodge Ram


I have a 1999 dodge ram with a 5.9liter. Come to a stop and bam no pressure. Replaced sending unit twice. First after market, then mopar. Problem is still there. Replaced pump. Problem was still there. So I talked to tons of dodge mechanics, and this is the real problem. Who ever said that these engines are none for sludge is just reall really stupid. BOTTOM LINE ON THAT FACT. Sludge comes from neglect...
Dodges oil pump makes 8-10 Psi at idle. Always mechanically test that no MATTER what. But the sending unit needs 12-14 psi to read it. So what happens is the engine warms up, and the oil thins. Then you come to a stop, and rpms are low, and your not producing enough psi for the sending unit to read it. So your truck is fine. But if the chime is getting to you. Install a high volume pump. I returned the stock one, and got the high volume pump. I will bet if you change your oil every 3,000 miles you will not see sludge at all. If your dodge has high miles replace valve cover gaskets, becauce the high volume pump may cause the gaskets to leak. Whoever said ther none for sludge just has no love for a dodge, or is a moron mechanic that is stuck in his ways. High volume pump is the fix $85.00 plus pan gasket. If you have a 4x4 you can do it yourself. Drop the starter. Remove torque converter cover. With a 13mm socket with a variety of extentions, and removing a dozen bolts. Do it yourselfer will complete it in 4 hours....

Mar 04, 2009 | 1999 Dodge Ram

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