Synthetic Oil, Clacky valves
12-06-2002, 08:23 AM
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Synthetic Oil, Clacky valves
Synthetic oil was recently put in during my last oil change. Valvoline 1 5W30 syn
The car has 145k miles on it and about 15k of those have been under 4 psi of boost. After my last oil change with this synthetic crap, ive been getting a nasty valve clacking noise from cold starts. I'm still in vaccum when it does it, but damn, it lasts like 3 minutes or so.
Could this be due to running syntheic oil after using traditional oil of the same weight? Also, its been pretty cold, whould just a change in weather cause my valves to clack louder than usual?
The car has 145k miles on it and about 15k of those have been under 4 psi of boost. After my last oil change with this synthetic crap, ive been getting a nasty valve clacking noise from cold starts. I'm still in vaccum when it does it, but damn, it lasts like 3 minutes or so.
Could this be due to running syntheic oil after using traditional oil of the same weight? Also, its been pretty cold, whould just a change in weather cause my valves to clack louder than usual?
12-06-2002, 08:57 AM
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Re: Synthetic Oil, Clacky valves (Replica667)
I was told never to switch to synthetic on a high mileage engine after having regular in there previously.
The reason behind this is that synthetic acts as a detergent, and and impurities and stuff that have built up around gaskets and stuff, which actually may be preventing a leak or what not, get cleaned away resulting in your engine leaking oil.
They say its best to start with it when its new. Dunno if its right or not, just what the dudes at the oil change place told me.
All I can think of is maybe it broke a piece of dirt of your engine somewhere and it got lodged in a valve. Who knows?
[Modified by ezekiel198, 5:58 PM 12/6/2002]
The reason behind this is that synthetic acts as a detergent, and and impurities and stuff that have built up around gaskets and stuff, which actually may be preventing a leak or what not, get cleaned away resulting in your engine leaking oil.
They say its best to start with it when its new. Dunno if its right or not, just what the dudes at the oil change place told me.
All I can think of is maybe it broke a piece of dirt of your engine somewhere and it got lodged in a valve. Who knows?
[Modified by ezekiel198, 5:58 PM 12/6/2002]
12-06-2002, 10:35 AM
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Re: Synthetic Oil, Clacky valves (Replica667)
Temperature deffinitely factors in. Metal shrinks when cold and expands when warm. That's why after your car begins to warm up the metal expands and the valve gap decreases, eliminating the clackity-clack.
12-06-2002, 11:11 AM
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Re: Synthetic Oil, Clacky valves (Replica667)
You have lots of mileage... plus you were on boost for a while.
I think your rocker arms and shafts are worn.
It takes a while for oil to presurize the bearings because they are too loose.
I think your rocker arms and shafts are worn.
It takes a while for oil to presurize the bearings because they are too loose.
12-06-2002, 11:20 AM
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Re: Synthetic Oil, Clacky valves (pervytheclown)
Do you start your car before you drive it?
Next time, try driving your car without starting it, and see if that makes a difference...
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12-06-2002, 09:05 PM
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Re: Synthetic Oil, Clacky valves (BlackDeuceCoupe)
Do you start your car before you drive it?
Yeah, I was wondering the same thing!
Next time, try driving your car without starting it, and see if that makes a difference...
Yeah, I was wondering the same thing!
Next time, try driving your car without starting it, and see if that makes a difference...
LOL! Sarcasm is great.
I can't stop laughing at that. Hahaha.
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