air compresser - The 1947 - Present Chevrolet & GMC Truck Message Board Network

novafrog · 01-06-2013, 09:28 PM

i got a used air compresser from a guy,when i got it home and hook it up,it had air coming out of the plug where you put oil in,must have air getting in crankcase,can anyone tell me what the trouble is,and how to fix it,thanks

hayhauler71 · 01-06-2013, 09:33 PM

i will say the rings are shot

_Ogre · 01-06-2013, 09:42 PM

there might be a little air coming out of the vent, especially on a used compressor
it should stop when the compressor is off, if not then the check valve in between the pump and the tank is leaking
if there is excessive air coming out of the vent the rings may be shot
the check valve should be in the line from your compressor and screwed into the tank

Skruffy · 01-07-2013, 01:49 AM

I agree with everything said so far. I think the question is - how much air is coming out?

Someone correct me if I'm wrong, but there will be crankcase pressure from the pistons an crank moving. If the rings are worn it will get worse.

I guess the question is: How does it pump up? How does it work for you? Does it spray oil out?

novafrog · 01-07-2013, 11:21 AM

Quote:

Originally Posted by _Ogre

there might be a little air coming out of the vent, especially on a used compressor
it should stop when the compressor is off, if not then the check valve in between the pump and the tank is leaking
if there is excessive air coming out of the vent the rings may be shot
the check valve should be in the line from your compressor and screwed into the tank

they is very little air coming out of vent when compressor is off,thanks

novafrog · 01-07-2013, 11:25 AM

Quote:

Originally Posted by Skruffy

I agree with everything said so far. I think the question is - how much air is coming out?

Someone correct me if I'm wrong, but there will be crankcase pressure from the pistons an crank moving. If the rings are worn it will get worse.

I guess the question is: How does it pump up? How does it work for you? Does it spray oil out?

very little air is coming out,it takes 7 or 8 min.to pump from 0-125,every now and then it will spray a little oil out,thanks

01-06-2013, 09:28 PM	#1
novafrog Registered User Join Date: Apr 2009 Location: dunlow wv Posts: 435	air compresser i got a used air compresser from a guy,when i got it home and hook it up,it had air coming out of the plug where you put oil in,must have air getting in crankcase,can anyone tell me what the trouble is,and how to fix it,thanks __________________ 72,2wd short bed cheyenne,350,350trans,air,tilt,tach,posi 373 gears 70 nova 5.3,350 trans 80 z28 350,350,trans,bought new 03 cat. 06 gmc swb ext cab

01-06-2013, 09:33 PM	#2
hayhauler71 Registered User Join Date: Aug 2009 Location: St. Paul MN. Posts: 1,996	Re: air compresser i will say the rings are shot __________________ Fuzzy

01-06-2013, 09:42 PM	#3
_Ogre Registered User Join Date: Jan 2012 Location: Motown Posts: 7,677	Re: air compresser there might be a little air coming out of the vent, especially on a used compressor it should stop when the compressor is off, if not then the check valve in between the pump and the tank is leaking if there is excessive air coming out of the vent the rings may be shot the check valve should be in the line from your compressor and screwed into the tank __________________ cool, an ogre smiley Ogre's 58 Truk build how to put your truck year and build thread into your signature shop air compressor timer

01-07-2013, 01:49 AM	#4
Skruffy Registered User Join Date: Aug 2005 Location: Central Illinois Posts: 187	Re: air compresser I agree with everything said so far. I think the question is - how much air is coming out? Someone correct me if I'm wrong, but there will be crankcase pressure from the pistons an crank moving. If the rings are worn it will get worse. I guess the question is: How does it pump up? How does it work for you? Does it spray oil out?



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