TD5 blow by

Bennehboy · Apr 14, 2014

My 2000 manual TD5 which has an alive uprated intercooler, hybrid turbo, boost box, and appropriate tune seems to be suffering from a fair bit of oil blow by.

A few weeks back I removed and flushed the intercooler to find a fair amount of oil, performance seemed to improve quite a bit after that with much less black smoke being noticable.

Since then and a few thousand miles on thanks to unexpected work trips she's smoking again so I suspect the IC had an oil film again.

I popped the oil filler cap off with the engine running and could only spot very slight smoke puffs which I think sounds about right from what I've read.

I took the breather, PCV (new 2 months ago), and MAF to Turbo inlet hose off to give those a clean - the impeller blades on the turbo had a film of oil on them.

After cleaning and reassembly I left the breather disconnected from the PCV and took this video:
https://www.youtube.com/watch?v=CbSMWHc5SgE&list=UUXNbwoJBaP-xZGcQF4L0Pew

Should I be expecting this much oil vapour?

Is it time to fit a catch can, or should I be looking at a compression test (or both?)

Bennehboy · Apr 14, 2014

A mate just did a video of his and it's about the same, so I'm probably barking up the wrong tree. Will keep looking :/

Maaarrghk · Apr 23, 2014

Hmmm. That looks quite smokey to me Benneh. What is the inside of his intercooler like I wonder?

LRM are currently dismantling a trashed TD5 engine (the water pump drive bust and the whole thing overheated, wrecking the head and block). They pulled the hose off the turbo and there was about half a teaspoon of oil in the stub pipe from it that the hose from the air filter goes over. They commented that this was normal.

Had the hose off mine the other day to check the turbo for wear and I'm pretty sure it was snuff dry though.

I will have another look tomorrow when the rain stops.

Are you still running the VVT? Mine is the standard one and so is the one in LRM. Just had a thought that there might be a crack in your turbo letting oil get to where it shouldn't be. Is the bearing OK? Is there some sort of valve that limits oil pressure to the turbo bearing? If so, has it stuck open, thus allowing too much oil in there?

Just a few crazy thoughts from someone yet to have a turbo in bits.......

Bennehboy · Apr 23, 2014

Hi mate,

Mine's not VVT but the standard turbo with an uprated compressor, larger diameter and made from a billet, so spools faster than stock.

I've fitted a MANN HUMMEL Provent 200 (see my vehicle thread - link in sig) to combat the oil accumulation in the intercooler and so far (200 miles in) in seems to be doing well.

This weekend I'll whip all the pipes off to check for oil, I'm pretty confident it's not the turbo bearing because the oil was pre turbo, but I'll deffo have at the hose down stream to see if there's oil.

I've decided I'm probably going to get a used TD5 and rebuild it as a project later on, I guess my valve stem seals and/or rings might be a bit worn.

Maaarrghk · Apr 24, 2014

I had meant to ask about the Provent and how it was going on. T'was I that asked where you got it from on your other thread.

Well, I had a look in mine today and it looked bone dry. I ran my finger tip around the full circumference and it came out black - so almost bone dry in there.

I looked at the joke book from that nice Mr Haynes last night and it said that the symptoms you describe could be down to turbo shaft (or was it bearing?) oil seals. Does that sound plausible?

disco19 · Apr 24, 2014

Bennehboy said:
My 2000 manual TD5 which has an alive uprated intercooler, hybrid turbo, boost box, and appropriate tune seems to be suffering from a fair bit of oil blow by.

A few weeks back I removed and flushed the intercooler to find a fair amount of oil, performance seemed to improve quite a bit after that with much less black smoke being noticable.

Since then and a few thousand miles on thanks to unexpected work trips she's smoking again so I suspect the IC had an oil film again.

I popped the oil filler cap off with the engine running and could only spot very slight smoke puffs which I think sounds about right from what I've read.

I took the breather, PCV (new 2 months ago), and MAF to Turbo inlet hose off to give those a clean - the impeller blades on the turbo had a film of oil on them.

After cleaning and reassembly I left the breather disconnected from the PCV and took this video:
https://www.youtube.com/watch?v=CbSMWHc5SgE&list=UUXNbwoJBaP-xZGcQF4L0Pew

Should I be expecting this much oil vapour?

Is it time to fit a catch can, or should I be looking at a compression test (or both?)

Hi

Just for reference sake if I remove my oil filler cap I get about the same amount of vapour leaving the engine however I have no water or oil loss. That's on 157k to.

Scott

Bennehboy · Apr 25, 2014

Cheers Scott

TD5 blow by

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