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2000 Chevy Silverado Oil Leak

Tiny
CHEVSILVERADO
  • MEMBER
  • 2000 CHEVROLET SILVERADO
  • V8
  • 2WD
  • AUTOMATIC
  • 100,000 MILES
I bought this truck used from a dealer. At first all I had wrong was a constant antifreeze leak (wasn't going in oil) friend put something in it and that leak has stopped. I took it to have oil changed and ever since I have had an obvious oil leak (puddle on ground when parked, steady drop). Friend of mine changed the oil filter, the oil plug and oil pressure sensor unit (?), With none of this stopping leak. I have to add oil about every 2 weeks and was wondering what was the next thing to do. I haven't had it to a shop because I don't have the money for a major overhaul right now and I can't afford to part with it for weeks (my only ride and I am only bread winner in house), single mom 3 kids.

Also, when standing outside of truck between cab and bed, are you suppose to hear a hissing noise? Someone told me it was the fuel pump I was hearing and it is normal.

Thanks for any input.
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Thursday, September 23rd, 2010 AT 9:25 AM

6 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 POSTS
Can you tell aprox where the leak is coming from? If it started when he did the oil change, it has to be either the drain plug or filter. Did he make sure there aren't 2 gaskets on the oil filter? Many times the old one will stick to the engine when the filter is removed. That plus the new gasket on the new filter will cause a leak. Did he replace the gasket on the drain plug?

NOTE: It is unlikely that the oil sending switch would start leaking after an oil change unless by accident it was hit.
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Thursday, September 23rd, 2010 AT 9:43 PM
Tiny
CHEVSILVERADO
  • MEMBER
  • 3 POSTS
I had one guy tell me it was coming from the back of the motor (hood up looking dead on). I have gotten under the truck and could not make it out because oil is everywhere under there, when I am parked at a gas station I can see it dripping - I want to say from the oil pan but I would have to pressure wash it under there to pinpoint. I know it is not gaskets and it is the right size oil filter b/c I had someone go behind that company and make sure. I
appreciate your input though.
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Thursday, September 23rd, 2010 AT 11:00 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 POSTS
That is about the only way you're going to find it, power washing it. As far as the rear of the engine, it could be coming from the intake or the rear main. However, having the oil change can't cause that. When you had the oil filter size checked, was it removed?
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Saturday, September 25th, 2010 AT 11:04 PM
Tiny
CHEVSILVERADO
  • MEMBER
  • 3 POSTS
That has been awhile. I think I we changed out everything to rule out wrong filter and bought new oil plug but I have had oil changed since then also. This last time my change oil light came on, we changed it and my light wouldnt go out so I had to turn key and pump gas to get it to go off. But now my oil pressure is reading 60 when it used to read 40. I dont know what is making my pressure run high now. I have horses but I am not pulling my trailer as long as my truck is doing all of this. Friend told me something in the middle of the motor (gasket, know when I hear it) so I am saving my money to have this done. I know they have to tear the motor down to get to it so very time consuming. Is it okay with the 60 for oil pressure, it wont come down after I drive it for awhile either. Bums me out because I bought it from a dealer thinking I was making out b/c I traded a 1999 Chevrolet Silverado with 200,000 miles. I know not a big trade up except for the 100,000 less miles but trucks are expensive. That was a 5.7 L. This is a Vortec but I dont know if it is a 6 or 8 - do they make both? How can I tell what mine is?
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Sunday, September 26th, 2010 AT 7:45 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 POSTS
The only thing I can think of is the intake is leaking. Once again, I don't know what the first oil change did to cause it, but I guess anything can happen. It just doesn't make sense to me. I wish I could see it.

As far as the oil pressure, 60psi is great and nothing to worry about. Finally, if you check under the hood, there should be tags from the manufacturer. On them you should find the engine size. I would guess it is a V8 and not a 6 cylender.

Let me know if you have other questions.

Joe
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Monday, September 27th, 2010 AT 7:19 AM
Tiny
LAMEHANDLE0_1
  • MEMBER
  • 3 POSTS
Mine leaked pretty bad. It was the cooler line, right up front. And blowing back under before it drips. Also, I have a hole in my dipstick tube. If you add oil and don't see it goin' up on stick, you might too. One stab you see some another stab you don't. Luckily I didn't overfill before I found that out. Mine (dipstick) goes right out a crack in the bend of the tube. I have to go behind my fender to guide it "in" rather than out n arcin' on my starter. I'll get it fixed, sooner later $13.00 tube quoted $145 $labor but that loses some oil under the crankcase pressure.
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Friday, October 8th, 2010 AT 4:49 AM

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