what is "blow by" and how do you fix it

Blowby is just oil going up past the piston, or gas down past the piston. It goes past the rings, or between them. There will always be some with engines, you can't completely get rid of blowby, but if it's really bad, new rings for you pistons will help.

and he said he would never be back

On 2005-12-10 19:30, gerber54 wrote:
and he said he would never be back

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I wonder if he bought the windstar? :flipoff:

On 2005-12-10 19:32, RolledToy wrote:
I wonder if he bought the windstar? :flipoff:

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im not back im just visiting :wink: and yes i bought it and gave it to my mother to use since her truck took a {expletive} i sold all my cars/trucks and bought a camaro

heres more info on the stuff http://www.pickupspecialties.com/Petromoly/petromoly_motor_oil.htm

and why is this stuff better than mobile1 or amsoil???

Don't waste your money.Excessive engine blowby is a mechanical problem that cannot be fixed with some snake oil engine rebuild in a can. :bigthumb:

Doug

On 2005-12-11 07:27, 70HEMICUDA wrote:
Don't waste your money.Excessive engine blowby is a mechanical problem that cannot be fixed with some snake oil engine rebuild in a can. :bigthumb:

Doug

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:withstupid:
Excessive blow-by is just that, rings or cylinder walls need attention.

How do you spot engine blow-by?

usually serious decrease in power and/or excessive smoke in the exhaust

On 2005-12-11 21:32, Omahastylin16 wrote:
usually serious decrease in power and/or excessive smoke in the exhaust

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i was told it was when smoke comes out of the valve cove or up the breather tube in to the air cleaner?????

No, smoke from the breather won't mean that. That's normal, since your valves are inside the valve cover, and oil gets sprayed in there to lubricate the valves. If you want to check for blow by, then if there is a lot of burning oil from your exhaust meaning that oil is coming up past the piston into the combustion chamber, or if your oil level goes down very quickly without a leak or burning. That means that gas is going down past the piston and breaking down the oil. Gas will break down oil very quickly.

I got some smoke from the breather none coming out the exhaust I just pulled the plugs for the first time and are gapped at 60-80 :shock: so im guessing not all the gas is getting burned up and u said gas will break up the oil so im gonna try new plugs

Hold up......thats one thing that has puzzled me. On my Jeeps 4.0L, it produces soooo much pressure and smoke in the crank case that it blows the PCV hose right off. It completely soaks my air filter. So I have a milk bottle under the hood that I route the PCV hose into and let it blow all the smoke and oil in there.

Does that mean that maybe I have something wrong with a valve???? There isn't even a hint of any smoke in the exhaust...clean and clear.

When's the last time you changed your PCV valve?

Doug

Well....I don't think this thing has a valve...just a hose coming out of the valve cover.

If it has no PCV valve then I'm not sure how it would blow the hose off.Does the hose connect to a plastic fitting or just go right into the valve cover?

Doug

If it has no PCV valve then I'm not sure how it would blow the hose off.Does the hose connect to a plastic fitting or just go right into the valve cover?

Doug

Excessive blow-by most certainly does pressurize the crankcase. It overwhelms the PCV system and can cause seals/gaskets to leak and oil traveling up into the air cleaner via the PCV relief line. Excessive amounts of smoke/vapor coming from the oil fill is excessive blow-by. This can be caused by worn/damaged rings, stuck rings, damaged cylinder walls, damaged piston, bad valve seals and/or rings set "in-line" on the piston.



:baby: