Carl Bentley

Hi lads. Im getting alot of smoke coming out of the Dump Valve, Unsure whats causing this. Could anyone shed some light?? It dont smoke on idle only when rev'd

Any help would be helpful

Thanks

Carl

Splitpin

Take it you have an atmospheric dump valve? Does the smoke have a specific smell, and are you talking about when you're driving the car, or just revving it at a standstill? Also, has this started to happen suddenly, or gradually got worse to the point you're asking about it?

If smoke is coming through the breather system in significant quantity, then the probable cause is piston and/or ring damage. Either way our ability to diagnose this kind of thing accurately via the internet is minimal, so the best thing you can probably do at this point is get the car looked at.

Carl Bentley

Its doing it on both stand and rev. It is smoking a fair bit, I will get my camera out and put it up. Gimme 10 mins

Carl Bentley

lol downloading my app for lg phone.. cant find my cd only on 1 meg connection

Splitpin

I love the way people think that posting some pictures or grainy video on a web forum will help in diagnosing often complex technical problems. Makes you wonder how people fixed issues like this before the internet was invented.

Carl, a big question in your case would be whether the smoke smells of oil or coolant. If your phone can't do smell-o-net, there is minimal value in your posting pictures or video.

With the best will in the world, the bottom line is that no matter what you post, none of us is going to be able to do any more than guess what the problem is, and we're certainly not going to be able to fix it. You've already got a pretty well educated guess. About the only other thing I can think of would be a head gasket that has failed in a very specific (and unlikely) way.

Sooner or later you're going to have to take your car to someone with the ability to diagnose and fix it. You may as well cancel your download, find out where your nearest specialist or dealer is, and get your car to them sooner.

Carl Bentley

YouTube - Smokey Dump Valve

It smells of oil, Just wanted to get some info before i take it to a garage and for them to tell me XXX, XXX and XXX is wrong with it.

Thanks

Carl

Splitpin

That doesn't look good, unfortunately. Educated guess remains as per post #2.

scoobiewrx555

My guess.....Turbo oil seals gone. It's only venting smoke when the BOV opens so that's smokey air in the intercooler which is only going to come from the turbo. It wouldn't surprise me if you have smoke coming out of the exhaust when pressing the accelerator and it dissapears on overrun.

Carl Bentley

When the missus gets back from work i will go and have a look. Need 2 people to check so.

She be back around 7.30 so will post back later

Splitpin

It's possible, but doesn't seem the likeliest explanation. Smoky air in the intercooler doesn't only come from the turbo, you're forgetting about the crankcase breather system. Also, if your suggestion is that the turbo compressor oil seal has gone (as it would have to have for it to be leaking oil into the IC), the oil will be released as droplets rather than burnt vapour

Actually, Carl, one thing that might be worth doing is removing the head and crank breather pipes one at a time, and seeing if this smoke is emanating from one or more of them.

Either way, car needs to be looked at.

scoobiewrx555

The crankcase breather system isn't plumbed into the intercooler. The attached external slim pipework on the intercooler acts as a cross-connect between 3 sets of breathers but there are no physical breather pipes plumbed into the intercooler.

If you get a chance to remove the intercooler check to see just how much oil is in the the inlet, and see if you can get the turbo inlet hose off and check the turbo shaft for play. If there is a lot of play in the bearing then burnt oil/smoke may be coming through to coldside from the hotside via the bearing.

This is something that's easy to do and won't cost you anything.

WMS

iTrader: (2)

I'd put money on a piston, has it started missing at all? Best thing is to get a compression test done, that will show straight away if it's a piston. Out of interest, is it a 'non forged' engine running upped boost?

Splitpin

Did I say it was? Ask yourself where the air goes after it's passed the breather plumb points in the inlet tract.

^ Quite.

Carl Bentley

No its been running ok, it does seem a little sluggish like juddering on idle for last few days, not sure on forged engine, but its running just 1bar. Ive got it in my mates garage tommorow to clean some pipes. cant remember what pipes he said.

Splitpin

When you start it, does it sound "normal" when turning on the starter, or does it sort of sound like it's about to fire and then drop back again?

Carl Bentley

Just tried it now. Engine does drop out but still starts

Splitpin

What do you mean by "drops out"?

Carl Bentley

sound like its gonna not start then starts

Splitpin

Piston, almost certainly.

mje_wrx

iTrader: (6)

compression test asap

Carl Bentley

Where can i get that done.??? Can it be done by myself or ??

Splitpin

You can do it yourself with a compression tester from Halfrauds, Machine Mart etc etc. Alternatively a garage will be able to do it, but they'll charge you a bit in labour if they have to remove the airbox, washer bottle and so-forth getting access to the plugs.

You can perform a quick and dirty test simply by disconnecting the crankshaft position sensor and turning the engine over on the starter. If the engine still has that "sounds like it's going to fire, but doesnt'" sound you mentioned earlier, you know you're losing compression in at least one cylinder. From what you were saying earlier about the car's behaviour during a normal start, you probably already know.

WMS

iTrader: (2)

If you take all the plugs out and examine them, if it is passing oil one plug should be a bit 'oiled up'. You really need to do a compression test, you don't get oil smoke coming out like that due to something minor, thats for sure!

Carl Bentley

Ok, engine is coming out. Gonna crack open the case. signs are looking like piston/rings. Depending on internals will fix. If not the car will be up for breaking. Will post later on tommorow when engine is out.

Carl Bentley

Ok just a update. Got the engine split.. One of the pistons is goosed.
My next step is to rebuild the engine from start.

Anyone help me with some internals to reach 300 - 350 bhp.

Currently have standard injectors. And TDO5 turbo, Full scorpion decat.

Looking @ spending around 1k

Just bought a little run around for the time being, so car will be off the road for my little project. Any help and suggestions would be appreciated.

Thanks

Carl

Splitpin

Sorry to hear that. Sounded that way from the start but at least now you know, and, most importantly, the damage has been isolated and ain't getting worse.

That's a bit of a funny target to hit. You can get over 300 by rebuilding with standard bits for next to no money. 350 though would require a bit more effort.

Is that an all-in price to get a running car? Also what sort of nick are the bores in - both the failed one and the other three?

Also can you post us up a picture of the failed piston? If not was it simple ring land fracture or a bit more fundamental?

Carl Bentley

Thats just the price for parts mate. Im going to be doing the work myself with a friend.. Dont matter about time as we got a run around now. Trying to get the picture of my phone but having no fun with my LG pc suite. Will try again

Carl Bentley

Ok got my phone working.. Here goes

Yfrog - 1001965e.jpg