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#1 |
Registered User
Join Date: Mar 2002
Location: newmarket,ontario,canada
Posts: 936
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250 oil usage
I have a GMC pick up with about 60.000 miles on it with a 250 inline six.The problem is oil in the air breather.I replaced the PVC valve twice.I was told by one of the board members it could be blow by in the piston.I took all the spark plugs out and replaced them.They were all burning properly.I had expected to find one oily or sooty if blow by was the problem.
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#2 |
Stylin
Join Date: Sep 2001
Location: Tuttle, OK
Posts: 620
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were any of the spark plugs bent/damaged in any way? if so you should check the compression in the cylinder. can you remove the oil fill cap and smoke blow out like a train? if so one of your pistons might have chipped and is allowing compression into the crankcase which is enough pressure to shoot oil up to the breather. if thats the case its time for a rebuild.
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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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#3 |
Registered User
Join Date: Mar 2000
Location: Lake Jackson, TX.
Posts: 1,930
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see if you have a baffle in the inside of the valve cover. could be just sucking the oil instead of just the smoke and pressures.
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2004 Silverado Crewcab (Dark Spiral Gray) |
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#4 |
Registered User
Join Date: Mar 2002
Location: newmarket,ontario,canada
Posts: 936
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I took it in to a mechanic and he said it is just old age and I,d have to live with it.I thought the inline 6 lasted forever.I guess my options would be having engine rebuilt or finding another one.6 cylinders are usually cheap but will I still have the same problem all over again,
Would valve seals cause this problem and aren,t they not to expensive to replace.The truck itself is rust free and worth keeping |
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#5 |
Stylin
Join Date: Sep 2001
Location: Tuttle, OK
Posts: 620
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dad told me something bout haveing the heads worked after like 45,000 or something like that
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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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#6 | |
DAMN, I love Big Blocks!
Join Date: Aug 2003
Location: New Mexico, USA
Posts: 619
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Quote:
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Marc Bona Hobbs, New Mexico 1976 1/2 ton GMC High Sierra. 454 c.i.d./ TH400. *Soon to get a mild warming over.* 3.40 rear. ![]() |
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#7 |
Registered User
Join Date: Mar 2002
Location: newmarket,ontario,canada
Posts: 936
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I blew out all the lines to the carb and replaced pvc valve.I checked it again and it was down a quart after a week.The air filter needs to be replaced again.
It does puff out some black smoke only upon starting up.Help as I am at a loss. One guy told me to add Lucas to the oil and put a piece of cloth or rag in the breather hole. |
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#8 |
Robert Olson Transport
![]() Join Date: Oct 2002
Location: recent transplant to NC USA
Posts: 20,287
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the puff of black smoke is raw or unburned fuel nothing to do with the pcv . id bef the baffle is missing or damaged in your valve cover pull that off and check it
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Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!! |
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#9 | |
DAMN, I love Big Blocks!
Join Date: Aug 2003
Location: New Mexico, USA
Posts: 619
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Quote:
__________________
Marc Bona Hobbs, New Mexico 1976 1/2 ton GMC High Sierra. 454 c.i.d./ TH400. *Soon to get a mild warming over.* 3.40 rear. ![]() |
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#10 |
Stylin
Join Date: Sep 2001
Location: Tuttle, OK
Posts: 620
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Piston rings or piston chipped
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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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#11 |
Registered User
Join Date: Mar 2002
Location: newmarket,ontario,canada
Posts: 936
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#12 |
Stylin
Join Date: Sep 2001
Location: Tuttle, OK
Posts: 620
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when u pull your valve cover off where the breather hole is theres a little rectangle box aka a baffel. if u can see threw it to the hole is probally your problem lol you'll need to buy a new valve cover
__________________
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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#13 |
You get what you pay for
![]() Join Date: Dec 1999
Location: Cherryville, NC
Posts: 4,798
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I agree with the guys. Pull the valve cover to make sure the baffle is not messed up or off. I doubt this is it, but worth a shot. If we were voting, I'd say your rings are shot.
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Mike 1985 Chevy C-10 |
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#14 |
Registered User
Join Date: Mar 2002
Location: newmarket,ontario,canada
Posts: 936
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#15 |
Professional Grade
Join Date: May 2003
Location: Fort McMurray, Alberta
Posts: 7,915
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350 would be your best option if upgrading to a V8 -- Parts are cheap and plentiful for the 350.
If you have the tools and the time, you could probally rebuild that I-6 yourself. Just ask lots of questions here, and get a book about rebuilding those engines. What kind of transmission do you have? Most of them should be powerful enough to handle it (SM465, TH350, TH400, all are strong enough for a 350, easily)
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1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap) |
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