Dry Turbo...

[sprattz30]

just wondering if removing the oil feed and cleaning it, then pushing some clean thin oil into and through the turbo is a good idea. Ca18det. Been reading alot of posts people saying there jap import turbo died shortly after first start.

Surely this is due to the turbo drying up and having no initial oiling.

[Evan G]

its prob due to there oil seals going rock after not running for like 5 years. if you really want just remove the oil feed line. poor some oil in it and turn the impeller by finger.

 

rule of thumb at work. don't rev the engine when youve just changed the turbo

[sprattz30]

ok so the seals gonna go no matter what being brittle n hard. Guess soaking with oil may soften it up. Other option I suppose is minor rebuild kit eBay 70$.

ca's seem to get a bad rep from spun bearings and shot turbos. Can't help but wonder if most of these problems might be caused buy import engines being wired up and run hard with crap oil still in them.

of course a few weeks later a bearing lets go due to dry start on sludge and they jump on the forums claiming there engine lasted 2 weeks and ca's are shit etc.

I reckon I'll pull the sump of mine and clean the pickup and change to some thin synthetic, maybe remove valve cover n pour some over the cams n wotnot before first start.

[Evan G]

if you put new oil seals thru the turbo theres a good chance it will be out of balance and will chew the bearings in no time.

 

ive been working on diesel's for about 3 years now and ive NEVER seen gunk under there rocket covers!. i think it has to do with the oil were running in them. so i decided to run the same oil in my 4k just to keep it clean after the rebuild. enduro lowsaps is what its called 10w40. when we drop the oil its like water!

 

 

or another thing you can do is when finished my rebuild. i just disconnect the coil and crank it till the oil light went out.

[Trev]

its prob due to there oil seals going rock after not running for like 5 years.

 

ok so the seals gonna go no matter what being brittle n hard. Guess soaking with oil may soften it up.

 

Turbo's DO NOT have oil 'seals', they have an oil control ring that is that similar to a compression ring on a piston, they are called a seal because well they seal the chamber and do not let oil out, the seal does not get brittle and hard, it will get covered in carbon and fail the same way a compression ring does.

 

If the turbo has not been used in a while then you can do one of the following:

 

1, put oil in the turbo be either filling the inlet or drain.

2, Undo the turbo drain, pull the plugs out (including the coil driver/ignitor) and wind the engine over until there is oil present in the drain.

[Evan G]

what the expert said! ^^^^

[sprattz30]

what the expert said! ^^^^

good Info people. Will do this . Interesting stuff about the oil control type ring.

pretty sure I've read some where diesel oils have too much detergent adds in them or some such trickery..whats the go with that?

Cheers.

[Trev]

good Info people. Will do this . Interesting stuff about the oil control type ring.

pretty sure I've read some where diesel oils have too much detergent adds in them or some such trickery..whats the go with that?

Cheers.

 

I have a few brand new turbo rebuild kits sitting at work so I will pull one out and get some pics.

 

Diesels are prone to running dirty, they have more detergents in the oil to help keep the engine clean, there is nothing wrong with using deisel oil in a petrol engine, I use to run castrol RX super in my old seca once in a while just to help remove carbon.

[Trev]

As promised...

 

 

You can see where the sealing ring sits here:

 

[19914afc]

we run petrol/diesel 20w50 oil in non vvti toyota engines at work, then 10w30 vvti oil in vvti petrol engines.

[Trev]

we run petrol/diesel 20w50 oil in non vvti toyota engines at work, then 10w30 vvti oil in vvti petrol engines.

 

That is a multi purpose oil though, most dealerships and even field service use it.

[sprattz30]

sweet cheers for the pics. Rx super is all we use at the mine site where I work all size engines from small gensets to 785d models with quad turbos, so must be some good stuff. So with the turbos, is it possible to replace the o rings and bush without upsetting the balance of the turbo? Or is this a workshop only job?

 

Cheers, Ken.

[Trev]

sweet cheers for the pics. Rx super is all we use at the mine site where I work all size engines from small gensets to 785d models with quad turbos, so must be some good stuff. So with the turbos, is it possible to replace the o rings and bush without upsetting the balance of the turbo? Or is this a workshop only job?

 

Cheers, Ken.

 

Bearings/bush & seals don't disturb the balance, putting the compressor wheel or turbine wheel on in a different spot will upset it.