Yamaha Combustion Cleaner
IMO....1 qt. every 1,000 miles is a LOT of oil loss. Have you checked your PCV valve lately....? Might just need a new one. If its stuck open you will use a lot of oil.......and it goes right through the intake and gums everything up again.
You should also remove the vacuum line from the TB.....remove the line to the valve cover.......and cap off both. That line is not needed.
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Interesting suggestions, Yeah I think qt every 1 k is way too much too. I didn't look at the PCV valve and its the original one from the factory.
If I cap off the TB hose to the valve cover how will the crankcase get fresh air?
If I cap off the TB hose to the valve cover how will the crankcase get fresh air?
[QUOTE=RockinWs6;18576569]Interesting suggestions, Yeah I think qt every 1 k is way too much too. I didn't look at the PCV valve and its the original one from the factory.
edit: scratch this post.......
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edit: scratch this post.......
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Last edited by LS6427; Dec 17, 2014 at 02:10 PM.
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From: Schiller Park, ILL Member: #317
Friend of mine has a weld shop and repairs cat convertors all the time. He told me there is a inlet screen that stops crap from getting jammed in cat itself. He thinks I probably blocked the screens. He also has a product spray foam you spray into the engine while its running that he says will dissolve the carbon blocking the screens. Gonna try it tonight.
What is more likely is that your plugs and/or O2 sensors became fouled by the cleaning process and the second product helped to clear that up.
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There is no fresh air going into the crankcase.....stock set up......Only vacuum pulling the crankcase gasses out and into the intake to be burned. The tiny amount of crankcase gasses comes from the combustion in the cylinders getting past the rings.
So that vacuum line going from the valve cover to the TB port.....is another PULL of crankcase gasses from that valve cover. It is NOT fresh air going into the crankcase. But its just not needed......there's no reason to pull gasses from the crankcase at that rate only when you go WOT. Thats when the TB vacuum port pulls gasses...at WOT only. You never spend enough time at WOT to worry about too much gas bypassing the rings. Maybe if you were a road race car....spending a LOT of time at WOT.......but for a street/strip car.....its not needed at all.
The PCV vacuum line is all we need..........
((boost setups and nitrous set ups....they might need more pull on the crankcase...or totally opened up crankcases with filters and vents.....and NO PCV vacuum lines at all...because they get a LOT more blow-by the rings then a N/A set up does)).
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So that vacuum line going from the valve cover to the TB port.....is another PULL of crankcase gasses from that valve cover. It is NOT fresh air going into the crankcase. But its just not needed......there's no reason to pull gasses from the crankcase at that rate only when you go WOT. Thats when the TB vacuum port pulls gasses...at WOT only. You never spend enough time at WOT to worry about too much gas bypassing the rings. Maybe if you were a road race car....spending a LOT of time at WOT.......but for a street/strip car.....its not needed at all.
The PCV vacuum line is all we need..........
((boost setups and nitrous set ups....they might need more pull on the crankcase...or totally opened up crankcases with filters and vents.....and NO PCV vacuum lines at all...because they get a LOT more blow-by the rings then a N/A set up does)).
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My set up on my 427ci for like 6 years just had an air filter on the drivers side valve cover to suck in fresh air......then my single vacuum line ran from the passengers side valve cover to the intake port.......it let fresh air flow across the entire crankcase. Worked great.......
I put a burning cigarette and the smoke was drawn right into the air filter on the drivers side valve cover........when I revved it that pull of smoke would stop so the PCV valve was doing its job by closing.
I think thats the best system to have if you are going to keep the PCV set up.
But....having no PCV set up works just fine also....I did that for about the last 3 years of the 427's life. No problems. And no oil in the intake at all.....everything was capped off. Just an air filter on the drivers side valve cover and one on the valley cover port.
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Quite honestly that would work fine. The computer will just adjust the fuel trims accordingly for the extra air coming in through the pcv. I may fool around with that.
I know I have one hole using a bit of oil, cylinder number 3 has signs of some oil usage. but its not oily, just some ash burnt onto the center porcelain after 85k miles. The intake has a thick coating so I know its a PCV problem. I got to get creative, find a solution.
Now I wish I had xray vision so I could see if the noise I have at idle is pistons or lifters. Its done it since day 1 but still messes with my mind.
I know I have one hole using a bit of oil, cylinder number 3 has signs of some oil usage. but its not oily, just some ash burnt onto the center porcelain after 85k miles. The intake has a thick coating so I know its a PCV problem. I got to get creative, find a solution.
Now I wish I had xray vision so I could see if the noise I have at idle is pistons or lifters. Its done it since day 1 but still messes with my mind.
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Verdad Gallardo Quite honestly that would work fine. The computer will just adjust the fuel trims accordingly for the extra air coming in through the pcv. I may fool around with that.
I know I have one hole using a bit of oil, cylinder number 3 has signs of some oil usage. but its not oily, just some ash burnt onto the center porcelain after 85k miles. The intake has a thick coating so I know its a PCV problem. I got to get creative, find a solution.
Now I wish I had xray vision so I could see if the noise I have at idle is pistons or lifters. Its done it since day 1 but still messes with my mind.
I know I have one hole using a bit of oil, cylinder number 3 has signs of some oil usage. but its not oily, just some ash burnt onto the center porcelain after 85k miles. The intake has a thick coating so I know its a PCV problem. I got to get creative, find a solution.
Now I wish I had xray vision so I could see if the noise I have at idle is pistons or lifters. Its done it since day 1 but still messes with my mind.
I just think the vacuum pull is too much to begin with.
So Ive done NO PCV at all......everything capped off with just a couple breathers.
Ive done the needle valve....
Ive capped some things off and used the pass valve cover only to pull with a fresh air filter on the drivers side valve cover.
Valley cover port being used......valley cover port being capped off.
.......Nothing changes, its all the same. Oil is always clean, no moisture, no problems. I do oil changes every 3,000 miles.......
PCV's are just not needed. And its great to drive the car knowing in my mind that there isn't a single micron of oil going into my intake.......
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Well the oil usage problem has stopped! It hasn't used a drop since the Envirotech cleaner was put through the engine. At the same time He put 4 ozs of Envirotech oil booster and I put the usual 3 ozs of Dex6 atf in. The rings must have been caked with carbon that bad. Another nice thing is it runs smooth cold, before this it always ran very rough cold.