OrionRST200bhp

iTrader: (1)

hi guys, i put on my new turbo technics t34 a week or so back. and have driven the car today to the mot station and back( 6 mile round trip ). and the car has developed a strange knocking noise coming from the turbo not the engine but the turbo. what the hell could this be? i took the filter and induction hose of to have a look in and there is alot of play in the shaft the car has only done 6 miles on a new rebuilt engine and brand new turbo. i will phone turbo technics up tomorrow but thought id ask on here to see what you all thought? i here of oil starvation in turbos but not surley on a new built engine with new turbo?

RSTS21990

Did you bleed the turbo oil supply pipe as they suggest with at least 1/2 litre of oil? (as in crank until that amount has come out of the turbo return pipe before starting the car)

stevieturbo

And did you check there is oil getting too, and leaving the turbo ?

Failure at such low usage would suggest no oil feed at all.

scoooby slayer

iTrader: (4)

there is no need to bleed a turbo with oil, it will have oil very quickly at start up and will hardly be spinning, you need to check you have oil feed to the turbo, simple test just take the oil feed pipe off and stick it in a bucket and crank/start the car for a second.

from there it needs a pressure gauge putting in to check pressure, my 2jz starved the turbo with a failed big end but luckily it was caught quick enough and saved it.


I assume being a new built engine that block rail pressure has been checked with a known accurate gauge ?

RSTS21990

Strange that, as Turbo Technics recommend it as recently fitted one on mine, and also most manufacturer's i've worked for recommend it as good practice also replacing the feed pipe/fitting a filter (or cleaning if already fitted) before doing this.

That's why they recommend doing it post turbo (on return pipe) as that tell's you it has oil feed and that there's no problem with the turbo itself, oil pressure gauge is waste of time as it's dictated by the engine and if the oil pipe is new or filter cleaned it's just wasted time IMO.

scoooby slayer

iTrader: (4)

im not saying don't do it but I am saying it categorically will not kill at turbo if its not primed, I don't need anybody to tell me that its obvious.

lol i test oil pressure feeding the turbo with a t line plumbed in so i can see exactly what pressure is at the turbo oil feed inlet, but the op may well not have the equipment to do that but he is likely to have a stock oil pressure gauge in the block hence me mentioning does he have a gauge hooked in to the block rail so he knows the oil pressure is good, its then the hose size and restrictor size that will determine how much flow and in turn pressure the core gets.

oil feed line size and if a restrictor is fitted will have a big effect on what pressure is reaching the turbo, ive seen the exact effect as i have drilled a restrictor out myself a few thou at a time and then retested until ive got the desired pressure feeding the turbo with a custom sized resrictor

St3V3_C

What direction is the play? one direction is fine, but I can't remember which

cossie891

iTrader: (1)

Another Harry styles fan lol

stevieturbo

I would not run a new turbo on a running engine without first confirming oil flow.

And almost sure any turbo seller or reman place will tell you the same thing

Absolute minimum crank the engine over with it disabled from running until you have confirmed oil pressure, or better still oil flow to the turbo.

Plus yes always manually fill the turbo with oil when refitting.