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09-01-2003, 09:17 PM
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#1 |
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Registered User
Join Date: Mar 2002
Location: newmarket,ontario,canada
Posts: 936
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Oil Usage
I have an 81 GMC 250 inline 6 using oil.There are no leaks but air filter is full of oil.What is the problem?Engine has about 80,000 miles on it.
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09-01-2003, 09:43 PM
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#2 |
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Registered User
Join Date: Oct 2002
Location: LAS VEGAS, NV.
Posts: 157
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oil in air filter
i would pull the valve cover and make sure the oil return holes were clean.
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troy wilson |
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09-01-2003, 09:46 PM
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#3 |
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BAD BOW-Silverado XST
Join Date: May 2000
Location: Senior Member from Austin, TX
Posts: 6,431
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Check your PVC valve. You also have a leak only in the higher RPM range. Have some throttle the engine and check around the oil pressure sending unit and filter.
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09-02-2003, 01:32 AM
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#4 |
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Right turn Clyde
Join Date: Nov 2002
Location: Cincinnati, Ohio
Posts: 2,911
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Doesnt that also mean that there is a chance of excess oil get in the breather do to blowby?
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1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI |
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09-02-2003, 07:47 AM
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#5 |
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Senior Member
Join Date: Mar 2003
Posts: 2,499
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I like that engine but it seems to always suffer from one problem......the cylinder closest to the firewall wears fastest and causes piston rock and blowby.
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09-02-2003, 10:39 PM
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#6 | |
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Registered User
Join Date: Mar 2002
Location: newmarket,ontario,canada
Posts: 936
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Quote:
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09-03-2003, 04:58 PM
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#7 |
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Genuine Chevrolet
Join Date: Feb 2003
Location: South West Pennsylvania.
Posts: 582
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If it isn't leaking oil then it must be burning it.
If the PVC is good then it's time you start looking again. Does it smoke a bit when you first start it? This could mean valve seals. Does it smoke even the slightest bit when you are driving around? This could mean bad rings.
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George 82 Silverado LWB 4x4 350 SM465 NP208 77 Chevrolet Blazer Chalet 400 TH350 NP203 |
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09-03-2003, 10:57 PM
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#8 |
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Registered User
Join Date: Mar 2002
Location: newmarket,ontario,canada
Posts: 936
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It doesn,t smoke.There is oil in the air breather and i,ve replaced air filter twice.
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09-04-2003, 12:37 AM
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#9 |
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Stylin
Join Date: Sep 2001
Location: Tuttle, OK
Posts: 620
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does it puff puff like this when u take the oil cap off while its running?
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Ive been traveling for some time, with my fishin pole and my bottle of shyne. Most Girls like finished products and just dont understand what a good addiction does for you http://www.paulwall.us/ |
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09-04-2003, 12:38 AM
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#10 |
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Stylin
Join Date: Sep 2001
Location: Tuttle, OK
Posts: 620
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sry forgot pic
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Ive been traveling for some time, with my fishin pole and my bottle of shyne. Most Girls like finished products and just dont understand what a good addiction does for you http://www.paulwall.us/ |
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09-04-2003, 02:44 PM
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#11 |
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Registered User
Join Date: Mar 2002
Location: newmarket,ontario,canada
Posts: 936
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What causes that?
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09-04-2003, 10:51 PM
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#12 |
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Stylin
Join Date: Sep 2001
Location: Tuttle, OK
Posts: 620
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worn piston rings or in my case the piston made a groove in the cylinder wall and all the compression was leaking into the crankcase.. have u looked at the valve springs? might get lucky and ones stuck open or something like that but if its that bad its rebuild time. another thing is hows the oil pressure? is it pegged out? if it is its compression getting to the crankcase
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Ive been traveling for some time, with my fishin pole and my bottle of shyne. Most Girls like finished products and just dont understand what a good addiction does for you http://www.paulwall.us/ |
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