Turbo Hyperthetical

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sniper007
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Turbo Hyperthetical

Post by sniper007 »

Hyperthetical question.

1) If a turbo breaks from to much play what are the likely events that are going to occur with the motor?

For example, blowing smoke, not revving etc etc.


Just a hypertheical as some one is selling me a mtoor with a possible blown turbo but unsure what they are talking about and would appreciate some ideas that the motor would be doing.

Thanks.
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Crumz
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Post by Crumz »

Depends a lot on the phrase 'blown'.

Could just mean that it has seized which isn't a huge problem. Just needs either a new turbo or the current turbo to be reco'd.

If it is broken, then theres problems. If it falls apart, where do the bits go? If it's on the compressor (intake) side, then the chunks get to go for the good old induction ride, through the intake (not a larger issue) and into the head (yay time). From there it can break valves, keep valves open, smash the compression chamber and plugs, smash the pistons, get caught tween the pistons and bores creating OMGBBQ problems (IE: It writes the block off), then back out the arse through the exhaust, taking out the turbine side of the turbo, blocking mufflers/cats etc.
Yay for you. Hypothetically speaking of course :D :D
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ROTAHAVIK GEM
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Post by ROTAHAVIK GEM »

depends, on what side of the turbo f*#cked up from shaft play,inlet side can cause a impeller to shatter and go thru the engine and if it is the exhaust side it mostly get's blown into the exhaust ,oil's seal's in the turbo will cause it to blo smoke,exhaust wheel in the turbo broken,not revving could be a number of things,
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sniper007
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Post by sniper007 »

The guy said he blew the turbo and drove it home.

The car drove fine all the way home except it was blowing smoke.

He also said the turbo wheel has about 20mm play in it .

If that helps....

Sounds like the seals to me.
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Post by ROTAHAVIK GEM »

just sounds to be a blown oil seal in the exhaust side of the turbo,and f*#cked bearing's/bushe's
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sniper007
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Post by sniper007 »

Okay sounds good.

Obviously I will not be able to test the motor before putting it in so is there anything I can do to check it before purchase?

Thanks!
ROTAHAVIK GEM
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Post by ROTAHAVIK GEM »

compression test it,should have an approximately close psi in all cyl's,do a dry test first then one with a little oil down each cyl,mine had 150 psi in all dry test, with a bit of oil it had 180 psi in all,to give ya an idea,this was a piazza engine mind you :D
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sniper007
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Post by sniper007 »

Unfortunately motor is out of the car and not running so cant do test.

Just a visual inspection.
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Post by PSI-26L »

I wouldnt buy it then, unless it is going really cheap?
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Post by sniper007 »

300 for motor box, turbo and ecu.

ca18det
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Post by ROTAHAVIK GEM »

yes you can :D

if the gear box is attached or the steel spacer plate that goes between the engine and gearbox, you can bolt up the starter motor and use a pair of jumper leads to the starter,and do it that way.... :wink:
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Post by ROTAHAVIK GEM »

is this the engine off jimbob03(Aaron)
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Post by PSI-26L »

sniper007 wrote:300 for motor box, turbo and ecu.

ca18det
Id say at that price the owner knows there is a bit more wrong with it then just a blown turbo? Could be wrong but that is cheap!
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Poida
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Post by Poida »

You know what I'd do... pull the turbo off and take it to a turbo repairer. Have them seperate the casing and inspect it. Might be just a simple replace bearings and seals but 20mm play would normally mean that turbine rotor has been banging the insides of the housing. That might mean bits have broken off (bad sign)while also damaging the housing and rotors. You need to first evaluate the cost of repairing that turbo as well as know if something has gone into the engine. If parts of the inlet turbine blades are broken off, PASS!!
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Poida
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Post by Poida »

Mind you, for the $300 going price it's probably worth while if the engine management is complete and all the software and programming handpieces are included. You won't expect to find too many EFI packages for that sort of price, assuming it's a programmable after market type.
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