Ok. so originally I took off the stock wastegate off my T25, bent the arm and then went for a test drive on the way to the movie theaters.

The good news;
Boost was steady at 5-7 psi which was great because now I can WOT my car!

The bad news;
In 3rd gear I WOT it to 6k rpms and as I released the gas poof all this smoke started coming out of my engine bay on the highway!

Scared the **** out of me I thought I blew my motor or something, I let it sit, started the car up again and once more all this white smoke everywhere. Eventually after letting it sit for a while on the side of the highway I started her up and inspected where the smoke was coming from. What happened was that the oil feed line that taps into the turbo is right by the exhaust manifold/adapter plate. Somehow the SS braided line must have leaned on the manifold and gotten so hot it leaked a hole????

Any how, any suggestions on why the line may have busted, and I ended up capping the oil T and drove about 15 minutes home. Would driving home for about 15 minutes without the oil feed line connected have any affect on the turbo?

 

TTT

Any reason the oil feed line may have busted?

i.e. too much oil pressure for the turbo to handle?

 

Braided lines can have flaws in them. This is why most companies that sell that stuff will tell you to pressure test your lines before installing them. (as if ANY of us ever do that) Either way, stuff happens... Replace the line and route it away from high heat sources or places that it can rub a hole in the line or it can rub a hole in something else. Depending on the size of the line, its most likely either a high strength high temp plastic like material (their is a name for it but I cant think of it off the top of my head.) or a rubber line under the steel braiding. They have heat and pressure limits just like anything else. (Mind you they can handle a LOT more pressure than you were probably feeding through it, the line may have melted some due to high heat, possibly touching the manifold which caused it to burst.)

 

ur turbo is dead now. 10 sec of no oil it too much

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Turbo E &raquo;</TD></TR><TR><TD CLASS="quote">ur turbo is dead now. 10 sec of no oil it too much</TD></TR></TABLE>

I hope you're kidding because that is **** if he wasn't boosting. Yes, it probably put some hard miles on it, but I doubt any more detrimental than high boost.

 

In order to handle speeds of up to 150,000 rpm, the turbine shaft has to be supported very carefully. Most bearings would explode at speeds like this, so most turbochargers use a fluid bearing. This type of bearing supports the shaft on a thin layer of oil that is constantly pumped around the shaft. This serves two purposes: It cools the shaft and some of the other turbocharger parts, and it allows the shaft to spin without much friction.

With that said... you do the math.

 

Turbo = Toast

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Kimbo &raquo;</TD></TR><TR><TD CLASS="quote">TTT

Any reason the oil feed line may have busted?

i.e. too much oil pressure for the turbo to handle?</TD></TR></TABLE>

bad install, wrong parts on the hose ends to the lines, thsoe are just a few.

your turbo is prolly toasted by now, but take it off, take it to a shop and have them look at it..

stan

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GudeH23a &raquo;</TD></TR><TR><TD CLASS="quote">In order to handle speeds of up to 150,000 rpm, the turbine shaft has to be supported very carefully. Most bearings would explode at speeds like this, so most turbochargers use a fluid bearing. This type of bearing supports the shaft on a thin layer of oil that is constantly pumped around the shaft. This serves two purposes: It cools the shaft and some of the other turbocharger parts, and it allows the shaft to spin without much friction.

With that said... you do the math.</TD></TR></TABLE>

You're right, but assuming he let off right when he saw the smoke he wasn't boosting for more than a few seconds without oil and the turbo wouldn't be spinning at 150,000rpm at 8psi, probably like 80-100k rpm