Lost Boost

[BigDirtyJase]

Hey Guys,

I was driving home tonight from a mates place. Turned onto the Ring Road from the Hume Highway and accelerated normally up to 100-105 k/ph...I cruised for a bit and went to accelerate again started to hear a horrible noise from the passenger area of the engine bay and had no boost....I turned off my boost controller (normally I'll have it set at 7.0 PSI) and nursed the car back home..

The car idles fine, can't see any smoke blowing from the exhaust (then again it's night time when it happened so I'll try again in the day time). The only mods is an turbo back exhaust, return flow intercooler and boost controller (set to 7.0 PSI)...

What should I look at first and what should I be looking for??

If it's something major...it's going to suck because a) no cash (due to being Christmas time) and b) it's new years so most places are closed...

http://youtu.be/WZkrXaVx6lM - here is the video I took when I was close to home...you may need to turn the volume up to hear the noise (and pardon me for starting the bleeding obvious in the video)

[stock stagea]

Check all the hose connections from the intercooler to the manifold. It has happened to me a couple of times just the connection separates and you get the sort of screaming squeal.

[66yostagea]

Check all the connections. Mine did the same once. It was a loose inlet to turbo

[BigDirtyJase]

Just checked all the connections, everything seems and feels pretty buttoned up....

[joshm35]

Sounds like the wheel is still spinning. I agree with the intercooler hose either blown off or split as I had this with my aristo.

[Daleo]

That sounds a lot like mine did when it threw all the exhaust impeller blades down the exhaust.

I'd be happy to be wrong though.

[66yostagea]

Or any one of the above

[PN-Mad]

Drop the cat, and have a look for stray turbines.... Sounds like it went boom.

[Daleo]

Drop the cat, and have a look for stray turbines.... Sounds like it went boom.

Drop the what?

[PN-Mad]

I thought it would have been stray cat related.

You're losing your touch.

[BigDirtyJase]

Yeah I'll check the cat tomorrow....my jack has just died...

If the worst case has happened...how hard is it to remove the turbo from the car?

[Ben C34]

Yeah I'll check the cat tomorrow....my jack has just died...

If the worst case has happened...how hard is it to remove the turbo from the car?

c34?

Heaps easy.

[BigDirtyJase]

C34 S2

[BigDirtyJase]

I've got a second hand HKS 2530 in the shed...will the standard oil and water lines work??

[BigDirtyJase]

UPDATE:

After spending new years away, I finally picked up a jack, jacked the car up and dropped the cat converter and checked the dump pipe and there is no evidence of exhaust fan bits....I took off the piping from the cooler the plenum and the turbo and found the nipple that is on the BOV return pipe (which appears to be the stock) has completely cracked and I can pull it off or plug it back in (I didn't have time to check the cooler pipes as I ran out of time)....

I have two questions.

1. is it best to weld it back up or plug the hole (since I have it blocked off currently)

2. I've quickly looked my HKS 2530 and realised that there is no nipple on the elbow coming off the turbo (the stock turbo does have one which one of the boost controller lines is connected to)...do I use that nipple or need to connect it somewhere else (all the piping that connects my intercooler to the turbo and crossover pipe is stock)

[BigDirtyJase]

I'll give you a quick update...I've been working interstate and hadn't had a chance to get the car fixed until a couple of days ago (also had to drive it to station and back a few times - nothing worse than driving and with something squealling from your car and people looking at you..lol)

It's finally all fixed, the turbo was pretty much dead...both compressor and exhaust wheels are on and there is some shaft play but when I'd tried to spin the turbine...It's stiffer and can hear the bearings are shot (hence the horrible noise)

I've finally got my car to the mechanics and got the turbo swapped out. So now I have the HKS GT2530 in. took out the broken nipple on the BOV return pipe and welded a bolt in its place..mechanic had to make some minor modifications with on with the oil and water feeds (I got to put a sleeve on the water feed pipe - any ideas)

The only issues I have left

-That it still makes a noise when it comes under boost (above 7psi) - I had this noise with the old turbo as well (I'll take a video later on to demonstrate) - I don't know if the BOV is actually working - what's the best way to test the BOV (and do you guys have any suggestions if I decide to get a new BOV)

-Get a Nistune installed and tuned (need to save up cash for this one) - With the 2530 installed I can drive around on 7-10psi but for my own piece of mind, getting the Nistune installed and then tuned for the turbo (I don't really like driving around with a new turbo but untuned)...Also it means I can do my engine upgrades and get a tune done straight away

[Daleo]

To test the BOV; cut a piece of sheetmetal the same shape as the mounting flange, and clamp it between the mating faces on the pressurised side of the intake. If the noise changes, or idle/ response improves, it was leaking.

[BigDirtyJase]

Thanks Dale...I will try that