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Keeping That Engine Alive

T04GTR

By T04GTR,
in New South Wales

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Beer Baron Grand Master

Beer Baron

Posted
Posted

personally i think all those oils are too thick. a X-50 or X-60 is too thick in my mind. unless you are pulling big power (big heat) and high rpm. nissan reccomend 7.5W30... now if you are going to the track etc it would be good to have a bit more thickness at operating temp. so 10W40 i think would be the go. taking into account your motor probably isnt new anymore, and you plan to give it a bit of a hiding. personally i use and like the motul chrono 300V. it's good shit.

wilch Grand Master

wilch

Posted
Posted

Made the switch to Mobil 1 super syn 5w50 yesterday.

I wouldn't say it went entirely smooth though...

Made the change and started her up. The oil pressure rose nice and quick (different to Motul, and a good thing), lifter noise was less.

BUT as soon as I touched the throttle there was a loud audible "CLACK". Touched the throttle again, and "CLACK!". WTF?

Anyway, I let it idle for a bit, then I brought her up to 3000rpm, where the thing went, "CLACK! clack CLACK CLACK!" as the revs rose. I quickly let off.

Did it again, and no noise. No initial CLACK. No clacking noise at all. What the hell happened?

Took the car for a drive and all's good. The turbo spools a lot sooner, and there is less lifter noise.

Still concerned about the initial noise though.

Also, this morning in the carpark I noticed the same noise, but not so much of a "clack" but an electrical "tick" noise that only happens when the throttle is opened and the car is in gear, ie. touch the throttle when in gear and you hear a single "tick".

Does anyone know what's going on? Is a lifter stuck or something?

sh@un Grand Master

sh@un

Posted
Posted

That's a doozy Wil. It's highly unlikely that using that oil will have caused that problem. I'm assuming the Motul oil you had was a 10w-x?, going to 5w cold rating in the Mobil 1 would have improved the oil flow to the lifter oil galleries at initial start up, if anything. You might need to elaborate on any other things you might have done while you were fiddling in the engine bay during the oil change.

wilch Grand Master

wilch

Posted
Posted
That's a doozy Wil. It's highly unlikely that using that oil will have caused that problem. I'm assuming the Motul oil you had was a 10w-x?, going to 5w cold rating in the Mobil 1 would have improved the oil flow to the lifter oil galleries at initial start up, if anything. You might need to elaborate on any other things you might have done while you were fiddling in the engine bay during the oil change.

Absolutely nada.

Car went up, undid sump plug, oil went over fingers, drained oil...Took oil filter off, spilt a bit of oil, let drain... Replaced with new oil filter, replaced sump plug, filled with oil, checked level, over filled as per this thread, started, rev'd, CLACK! Then no clack. Now "tick" on initial opening of throttle.

:

Previous oil was Motul Turbolight 4100 10w40.

someonestolecc Grand Master

someonestolecc

Posted
Posted
Car went up, undid sump plug, oil went over fingers, drained oil...Took oil filter off, spilt a bit of oil, let drain... Replaced with new oil filter, replaced sump plug, filled with oil, checked level, over filled as per this thread, started, rev'd, CLACK! Then no clack. Now "tick" on initial opening of throttle.

WTF.

Is it possible the agents in the new oil are taking away that the old agents didn't get or something? I'm scared of changing oils for this theory..

Other than that maybe it's just loser and shit is getting tired in your engine?

d00dz Grand Master

d00dz

Posted
Posted

Strange, I had similar noises when I changed from mobil 1 5W/50 to Motul Turbolight 4100 10w40, the lifter noises where more and this noise comming from the top end of the engine.

Changed it back to Mobil 1 and it was fine.

Weird.

wilch Grand Master

wilch

Posted
Posted

Apart from the initial weird freaking noises, and that electrical "tick" noise on opening the throttle now, everything's good so far.

As I mentioned before the turbo is spooling alot earlier. (Really noticeable as I don't have the stock turbo).

Also the lifters aren't making as much noise as before.

I don't know what the hell the tick noise is though. Seems to be coming from injector no.1.... or the timing belt cover. AND it only happens when the throttle is opened (one single tick) then it's normal.

Oh, also the "tick" noise only happens when the car is in gear and the throttle is opened.

Seriously, what the hell?

d00dz Grand Master

d00dz

Posted
Posted
I don't know what the hell the tick noise is though. Seems to be coming from injector no.1.... or the timing belt cover.

Sounds exactly like mine.

A metal type ticking? Prolly just the engine being a bish.. and not waiting to drink the new oil.

How come you changed oils?

d00dz Grand Master

d00dz

Posted
Posted
cause of this thread.... (and cause the lifters were making more noise after a long drive than they use to).

Well hopefully it will just be ok after a while. Otherwise change back to the motul one and see if problem exists or not.

i would love to know how a new brand of oil affects turbo response so dramatically. it must be some special shit!! lol :)

Oh yea.. @ $1000 a litre. :P

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