What oil you using ?

[Finlay007]

Hi there folks

My LS1 has done approx 80 k miles an im currently running royal purple 10W 40 but want to try a differen grade/oil as when temp is up i get a horrible squealing noise from engine but only when temp is high

Can anyone recomend an oil for me to try ?

Many thanks

Finlay

[mik_ok]

I'm using Castrol Edge, but a squealing noise doesn't sound like an oil issue?

[snowwolf]

Definitely nothing to do with the oil your using, when was your Aux belt changed last? they tend to squeal when cold but it still could be that, best to check

[Finlay007]

Thanks for reply, squealing is still there when aux belt is off, defo not water pump as i fitted a new one, thought it might be vacume related - pretty sure its not, the fact that it only happens when oil temp is very high suggests to me oil is getting to thin and maybe not lubricating cam effectively, its only a theory of mine do thought id try a different oil grade before i start tearing engines apart !! Lol

https://www.youtube.com/watch?v=AhX6A_aEN_I this is a link to vid

Open to different theorys :-)

Cheers

Edited by Finlay007 on Monday 4th August 21:11

Edited by Finlay007 on Monday 4th August 21:12

[snowwolf]

Sounds a sort of metallic ring, thrust race bearing ? try a slight pressure on clutch pedal but you probably have tried that.

[Finlay007]

just been researching, it also could be the PCV tubes are mixed up, will investigate in morning

[Finlay007]

snowwolf said:

Sounds a sort of metallic ring, thrust race bearing ? try a slight pressure on clutch pedal but you probably have tried that.

yea tried that, as i thought it could be clutch issues as i had just fitted a new one and alloy fly wheel

cheers

[Finlay007]

watch this, exactly same as mine lol

https://www.youtube.com/watch?v=wj-gglKQ3KI

[ARAF]

Finlay007 said:

watch this, exactly same as mine lol

https://www.youtube.com/watch?v=wj-gglKQ3KI

You may have found your culprit. Got to admit, that noise sounds worrying, until you know what it is.

[snowwolf]

ARAF said:

You may have found your culprit. Got to admit, that noise sounds worrying, until you know what it is.

Hey, good find, bet that has put your mid at rest LOL

[Finlay007]

I was fearing the worst lol

[ARAF]

Finlay007 said:

I was fearing the worst lol

Fingers crossed that is your problem.

[Finlay007]

Cheers mate, il let you know tom ;-)

[Finlay007]

hi Folks

update - prob solved, i had the PCV vent going into the top of the TB instead of into the inlet manifold port just below the TB one

phew !!!!!!!!!!! thanks for all the help :-)))))

Finlay

by the way i removed the PCV valve when i first installed the engine, has any one had issues with removing it ? cant see any oil in hoses so far

cheers

[snowwolf]

Cheers for the update, bet you are glad its sorted

[robbyd]

Mobil1 in my LS1 - feel the Royal Purple is too thin in this engine as it smokes a bit more!

Edited by robbyd on Tuesday 5th August 21:42

[ARAF]

Cracking result Finlay.

[Finlay007]

Cheers :-)

Yea agree that royal purple smokes a hell of alot !!!