Right, i sometimes get a puff of blue smoke on start up, depending on how iv been driving.
Now it would smoke for like 5 seconds and then clear, this is werther its a cold engine or even after say 1-2 hours after driving.
This mainly happens if i have driven the car on boost.
I have tried driving the car off boost for a few weeks and it stoped smoking.

-Oil level is not to high (Just under full mark)
-I have fitted an oil catch tank and vented breathers to atmosphere
-Cleaned out all boost pipes and intercooler
-No after market dump valve, just standard Recirc
-No blue smoke on boost
-No blue smoke on engine over run
-No blue smoke on normal driving conditions
-Car does burn oil, but nothing excessive (about 1 litre per 1000 miles)
-Oil used is millers CFS 10/40
-Car drives/boosts well and holds boost well

Bit about the car...
Its a 1999 Version 5 Type-R
standard apart from decat, full system and panel filter
70ish k miles
I have recently rebuilt the engine due to spining a bearing, i rebuilt the whole engine, all new gaskets, seals, new valve steam seals, rings new sump
new modine the lot everything new!
Done over 2000 miles now since rebuild
(just for the record, it used to blue smoke the same before the rebuild)

Uprated oil pump
V9 crank and ACL bearings
Cosworth baffle plate
25 row Mocal oil cooler and stat


What it could be....

Turbo? (The turbo says IHI VF28 on it)
When i done the engine rebuild, i split the turbo where the clamp is, and inspected, it seemd to be dry, no impella play either.
Faulty steam seals? (as stated above, these were replaced when i rebuilt engine)
Worn valve guides?
Cracked head?

Some help/advise/ideas please

 

i hav a bug n it sounds the same mate, im convinced its my oil seals, its been like it for months, iv been told its the decats tht hav caused it, they release the back pressure off the turbo mine does it most if i let it tickover for about 10 mins, it doesnt smoke on start up or down the road but only on tickover n after short runs its worse.

 

Yours doesnt sound streight forward either, its annoying isnt it!

 

how big are the catch tank inlets ? and how big are the pipes going to it ? was the block bored with pistons matched ? rings gapped right ?? how many miles have rings and pistons done if not changed ?

 

mines doing something the same, ive been told its possibly the oil seals on the turbo, ive not managed to source a replacement low milage td04 turbo which ill be fitting in the next week or so, ill report back if it cures it fingers crossed

 

yea its ****, in traffic u feel like a dick lol , iv got a 2nd hand turbo im not sure if i should fit it or send it to get the oil seals doubled up and reconed so i kno its perfect

 

If your thinking the breathers are not big enough then dont worry as i have even ran it with out the breathers on and it was the same.

Dint need to rebore the cylinders, i honed them and fitted new rings, the oil isnt seeping past the rings anyway, its been the same even beffore the engine rebuild.