MTI 427 oil consumption problem
MTI 427 oil consumption problem My roommate is getting concerned there is something seriously wrong with his MTI built 427 vette. the car is burning about a quart every hundred miles or so, and the "low oil" text continusly comes up. is this normal for a stroker of this size or is something seriously wrong with the car? trying to get some ideas before we just have it towed over to MTI for them to start pulling **** apart to figure out whats wrong.
Is it still under warranty? Sometimes the PCV system is the culprit. Forged pistons also expand more than hypereutectic pistons, and can sometimes let oil pass into the combustion chamber until they are at full operating temps.
unfortunatly it isnt under warranty. when he got the car last summer it already had the Z07 package on the car. there warranties arent transferable. i wasnt aware forged pistons did that, learn something new everyday on this site! thanks for the info Nine Ball.
Most high performance engines require more attention, but it is certainly not normal for forged pistons to allow for that kind of oil consumption--unless they have a few holes in them--1qt/100miles. Something is definitely not right. Do some searching and check the easy things: noticeable leaks in the engine bay/ground, check the PCV system, exhaust color/smells, etc.
Good luck. What kind of shape was the car (motor) in when he bought it? How long has he had it? Does it run ok? Sprayed?
Ryan
Good luck. What kind of shape was the car (motor) in when he bought it? How long has he had it? Does it run ok? Sprayed?
Ryan
Originally Posted by 96-speed
Most high performance engines require more attention, but it is certainly not normal for forged pistons to allow for that kind of oil consumption--unless they have a few holes in them--1qt/100miles. Something is definitely not right. Do some searching and check the easy things: noticeable leaks in the engine bay/ground, check the PCV system, exhaust color/smells, etc.
Good luck. What kind of shape was the car (motor) in when he bought it? How long has he had it? Does it run ok? Sprayed?
Ryan
Good luck. What kind of shape was the car (motor) in when he bought it? How long has he had it? Does it run ok? Sprayed?
Ryan
thanks for the replys. keep the ideas comeing.
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Originally Posted by 1320FEVER
I would be suspicious of the head gasket 
Aren't re-sleeved motors notorious for this?
Aren't re-sleeved motors notorious for this?
Originally Posted by Nine Ball
Head gaskets do not cause oil loss, they only cause coolant loss. If the head gaskets were bad, there would be coolant in the oil pan, and the oil would look like a creamy milkshake.
You passed
I would not worry too much about it. My car loves to "USE" oil. It all turns up in my catch can, I dont burn oil. If I beat on the car or if I drive it sustained 90mph which is about 2800rpm with my 4.10s the oil just flys away. As long as there is no smoke I would not sweat it.
Thomas
Thomas
well i as well have an mti motor but its a 422 and burns alot of oil,was one of first built be them.runs rich as hell,rebuilt the motor to check everything and all well ok,but still burns alot of oil
Keep in mind that if you are "burning" oil as bad as you claim, there would be tons of smoke following you around when you drive it. I'd suspect the PCV setup first if the car isn't smoking badly.
ya there is no large clouds of blue smoke. it just reads low oil continously, wanted to get some ideas on what it could be before takeing it over to MTI. its going in anyways for a fasst 90 setup and if i can convince him a bigger cam.
and thanks again everyone for the advice.
and thanks again everyone for the advice.
IMO, people that think 1qt/100mi is ok are just trying to convince themselves they don't have a problem. That is a TON of oil no matter where the oil is going. That's over 2 gallons every 1k miles 
.
Does the car hav e a catch can?
If your buddycan afford it, just take it to MTI and have them look at it. If not, keep searching
.
.Does the car hav e a catch can?
If your buddycan afford it, just take it to MTI and have them look at it. If not, keep searching
. 
