98 silverado 4x4 1500 5.7 liter oil pan was replaced but oil is still leaking what could be the problem

Hello....The first thing that you want to check..since you said the leak is in front is the area around the bottom of the crank shaft..If the oil is comming from there...This is where the main oil seal is for the crank shaft bearing...If no oil is comming from that area...you can breath a sigh of relief...There are a lot of stop leak products for everything from radiators to oil systems to transmissions...I'm not a big fan beacuse ...If it can stop a leak...it can stop the flow....The best cure for an oil pan leak is to drain the oil.....Drop the oil pan...replace the gasket...and if you do it right...you'll be good to go for a long time...PS.....don't forget to replace the oil....I hope this was helpful.....PEACE.....

For more oil and oil pump details check out the direct links below: ---

How to Replace Oil Pan on car?
http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-oil-pan-on-audi-a4-and.html
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How to Replace an Oil Pan Gasket?
http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-oil-pan-gasket.html
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HOW TO REPLACE AN OIL PUMP
http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-oil-pump.html
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HOW TO CHANGE ENGINE OIL AND FILTER
http://schematicsdiagram.blogspot.com/2011/07/how-to-change-engine-oil-and-filter.html
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HOW TO REPLACE AN OIL PRESSURE SWITCH (SENSOR)
http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-oil-pressure-switch.html
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How to Check Differential Oil Leaks and Replace Oil
http://schematicsdiagram.blogspot.com/2011/07/how-to-check-differential-oil-leaks-and.html
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HOW TO PERFORM A BASIC ENGINE TUNE UP-OIL CHANGE
http://schematicsdiagram.blogspot.com/2011/08/how-to-perform-basic-engine-tune-up-oil.html

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Oil pan Gasket on car?
http://howtobyme.blogspot.com/2011/11/oil-pan-gasket-on-1998-toyota-tercel.html

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Oil pressure for car?

http://schematicsdiagram.blogspot.com/2011/12/oil-pressure-for-2001-gmc-jimmy-v6.html

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How to replace Oil Pan on car?

http://schematicsdiagram.blogspot.com/2011/12/how-to-replace-oil-pan-on-2008-honda.html

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How to replace Oil Pressure Sensor on car?

http://schematicsdiagram.blogspot.com/2011/12/how-to-replace-oil-pressure-sensor-on.html

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How to replace Oil Pump on car?

http://howtobyme.blogspot.com/2011/12/how-to-replace-oil-pump-on-2008-honda.html

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Car oil leak?

http://schematicsdiagram.blogspot.com/2011/12/car-oil-leak.html

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http://schematicsdiagram.blogspot.com/2011/12/car-oil-leaks-from-valve-cover-gasket.html

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Oil light blinks on dashboard?

http://schematicsdiagram.blogspot.com/2011/12/oil-light-blinks-on-dashboard.html

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Oil pressure issues on car?

http://repairhelpcenter.blogspot.com/2012/01/oil-pressure-issuers-on-toyota-tundra.html

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Oil leaks from air filter on ford?

http://technoanswers.blogspot.com/2012/01/oil-leaks-from-air-filter-on-ford.html

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Wire running from oil pan to alternator?

http://technoanswers.blogspot.in/2012/02/wire-running-from-oil-pan-to-alternator.html

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Why car leaks oil from oil filter?

http://schematicsdiagram.blogspot.in/2012/02/toyota-camry-leaks-oil-from-oil-filter.html

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Why engine is consuming lots of oil?

http://schematicsdiagram.blogspot.in/2012/02/2008-scion-xb-24l-engine-is-consuming.html

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Maint REQD message on car dash?

http://schematicsdiagram.blogspot.in/2012/02/maint-reqd-message-on-2008-lexus-rx350.html

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Remove Sump oil pan?

http://repairhelpcenter.blogspot.in/2012/03/remove-volkswagen-sump-oil-pan.html

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Sump not coming OFF?

http://repairhelpcenter.blogspot.in/2012/03/sump-not-coming-off.html

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How to remove the sump on car? http://repairhelpcenter.blogspot.in/2012/03/how-to-remove-sump-on-vw-beetle.html

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Car oil sump removal diagram?

http://repairhelpcenter.blogspot.in/2012/03/volkswagen-beetle-oil-sump-removal.html

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This will help.

Thanks.

Hey Phil,
I own a 98 silverado and just had to drop the pan this weekend. The first thing you will need to do is diconnect the battery, un-bolt the starter, ****** strut arms, fly wheel cover and un-bolt all the oil pan bolts. (I also had to remove the oil filter and adapter cause there was one oil pan bolt I could not get to.) The next step is to pull both motor mount bolts and raise the motor up with a cherry picker. I slipped two 2x4 blocks under the motor to rest on the motor mounts.

I hope this was helpful and you were able to get your oil pan off. I know its alot to do as the MFG was not thinking when they built them or somthing.

Chris

Oil pump is in the oil pan. I hope you took pan off before asking question!

you have a cracked head most likely there was a batch of heads with a castech casting mark that caused some problems just like what you describe. here are some pics of what to look for.

you have to reseal the oil pan, the oil pan is a 2 piece upper and lower pan. the engine or trans mission has to0 be rtemoved to remove the oil pan per general motors there is new sealer available also the front and rear crankshaft seals should be replaced (need special tools to replace seals)

Oil Pan Removal

1. Remove the bolts attaching the fan shroud (8146) to the radiator (8005) and position the fan shroud over the fan assembly.
   
2. Raise vehicle.
   
3. Remove exhaust manifold-to-exhaust pipe.
   
4. Disconnect the oil cooler line at the left side of the radiator if equipped with an automatic transmission (7003).
   
5. Remove the nuts and lockwashers attaching the engine support insulators to the chassis bracket.
   
6. Drain the crankcase.
   
7. Loosen transmission mounting nuts.
   
8. Raise the engine (6007) and place wood blocks securely under the engine supports.
   
9. Remove the oil pan attaching bolts and lower the oil pan (6675) onto the crossmember.
   
10. Remove the oil pan from the vehicle.
    

Replace oil pan gasket, make sure not coming from behind timing belt cover first.

Could be a rear main seal.

Northstar engine, that's about right. They do take about 8 quarts.
The most common place they leak at is at the oil filter housing that attaches to the block of the engine.