Thread: Oil Catch Can for D4

Originally Posted by rar110

This could be a good option for the tdv8 L322. Here's what the intake manifold looks like after 250,000km.

I pulled my MAP sensor out over the weekend while having a look at the coolant pipe. It had a lot of goop on it compared to last time I looked.

I fished in the manifold hole with a flat screwdriver and could feel heaps of goop some of which I extracted. It is seriously messy stuff.

What I want to know is if a long highway trip such as what I have done aids in clearing it out or makes no difference.

With so many LRs employed in driving to the shops and back or school and back for wifey makes me wonder what condition they are in when turned over at the end of the 3 year lease?

Originally Posted by PerthDisco

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What I want to know is if a long highway trip such as what I have done aids in clearing it out or makes no difference.

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It will help clean carbon from the engine (e.g. pistons) and exhaust but not the intake. Diesel soot is stable until 550oC. DPFs have catalysts that lower that temperature to around 350oC.

What will happen with intake deposits is the oil will slowly evaporate and leave the soot and heavier oil additives behind. This doesn't really hurt the intake ducts but can damage turbos and block intercoolers.

It's probably worth it then. I'm thinking about taking your provent off the 4BD1 and putting it on the tdv8.

Most of the muck in those Pics is EGR...

I took the elbow hose off the driver side bank. Quite a bit of oil coated the inside but no EGR soot. The inside of the intercooler and turbo must be coated in oil.

Originally Posted by Tombie

Most of the muck in those Pics is EGR...

You get the build up of EGR soot because it mixes with the condensed oil vapors - get rid of either the CCV or the EGR, and you don't get that build up. Disable both and your intake should stay sparkling clean!

Originally Posted by Grentarc

You get the build up of EGR soot because it mixes with the condensed oil vapors - get rid of either the CCV or the EGR, and you don't get that build up. Disable both and your intake should stay sparkling clean!

Exactly

I have been advised to fit 2 catch cans to my vehicle because it has twin turbos. Is this fact or fiction as I would have thought one would just be fitted to primary turbo. Not sure there is enough room for 2 let alone 1.