What is it usually mean on a cossie when you have come on boost let off again and then you get a big cloud of blue smoke?
It only does it when you have been on boost.
Is it the turbo seals?

 

Sounds more like stem seals, but if any amount of miles probably a combo of everything, if it's only then I wouldn't worry.
Mine does it even with new turbo and head, but I know my rings are shagged!!
tabetha

 

The bottom end is fresh new everything got a old t34 on it now never smoked before that
just paraniod i think must be turbo
As I say it only smokes when on boost
wont smoke from cold

 

sounds more like the turbo to me. mine would give a puff after boost when i put the foot down again. the rings and stem seals had been done . a new turbo cured it.

 

Oh well thought so is it ok to keep on to run the engine in or shall I take the act arm off

 

My old T4 was like that Barry - the new one solved it.

 

rings

 

Brand new rings mate

I drove it with the waste gate fully open and no smoke as soon as the act is on
again it smokes

 

if you guys new how he rebuilt it you would be all saying its not been built properly ie just thrown together you should of took me up on my offer now you have to do it again more money you ant got

 

It was buit proper mate by my boss for free

Its the turbo it must be

What do you mean thrown together?

 

lets see how long it last did he hone it out properly ie 45 degres cross hatch

 

Yes mate it was all done properly hes been building cars for 40 years

Recently built his 1960s v8 mustang thing thats was a physcho stupid power

 

im still saying rings

 

having seen the comment about it being built for free im now guessing its something more terminal like the rings.

 

No my boss built the bottom end in return for overtime without pay

I was there the whole time it can only be the turbo i have drove it without any boost and its fine when its boosting its only boosting .5 bar as its running in

 

make sure you get the dam thing in boost as the rings won't bed in otherwise, mine puff's alittle out after i've given it a boot-full (32psi+)
Its just part of owning a cossie it will use some amount of oil (shouldn't be alot mind but they do use it)

my turbo has been on there 9 yrs so probs due a re-build anyhow

if your in any doubt get the turbo checked and re-sealed

 

Does sound like turbo but even with a new turbo it will still blow out abit of blue/black smoke when giving her some beans!

 

If you fitted new rings are you using a mineral oil to bed them in, if not it will smoke its arse off from now to dooms day.

Steve

 

Im not using mineral oil to bed them in mate never had before always used £20 a gallon stuff same as a mate of mine and his was fine

 

I can drive the car for hours off boost with no smoke but as soon as it sees some it will smoke

 

if you've pussy footed it about while bedding it in and not used a cheap nasty running in oil i doubt your rings will have bedded correctly and as soon as its seeing boost and backing off again its pulling past the rings and out the exhaust, take the plugs out after you've given it a foot full and post a picture up if they look all oily your engine is burning oil if they are all clean and have the right colour to them i'd suspect your turbo seals

 

Its only done 200 miles so far so shall I give it a bit of shit or not

 

well 75%+ of the running is done already get the standard boost running threw i and change the oil for some normal high milage mineral stuff do another 300 miles but use the car and the full rev range but don't thrash it then drop the oil and use some correct synthetic oil and get the cars boost and fueling set and take it from there.

if you done 200 miles driving like a faggot the rings won't have bedded in

mine get 10 mins with mineral oil holding revs at 1500rpm - 3000 rpm
drop the oil and filter more mineral oil then 50 miles of driving around on boost using the rev's but no thrashing then back for another oil and filter change this time some semi-synthetic rubbish and then 200 miles being used on-boost all rev's but no labouring the engine, then back for a final oil & filter change on 15w-50 full-synthetic and straight for a check up for boost & fueling and then driven hard so in total engine has done 300 miles+ then used hard it will of course still loosen up with more miles but out of 10+ engines i've built 1 has never failed or burnt oil.

it goes without saying that it get a full nut and bolt check after the 1st 50 miles but if you have done the job right you shouldn't have any issues

 

Its been given a bit of stick first 30 miles was upto 4k its been to 6.5k a few times

Gonna drive it like you said then

 

Mineral oil is th stuff to use though Barry mate

 

Gonna buy some as soon as I can then Shall I not drive the car untill I get some

 

I done mine on mineral oil and boosting like normal but not for long periods, only shorts like 5 secs, changed from mineral to Silkolene Pro S 10w50 after 800 miles

I've done now 15000 miles with no smoke

 

LOL Silky "I won't have another Cossie" heh. I came up and bought your hubs a while back. So the Jap has gone and back to Cossie goodness, nice one

 

didn't intend on going back my mate wrote my Evo MR off and so i bought another cossie until/eventually he pays me back

 

Had another look at turbo and there is a a oily film in the compressor housing and a bit of in and out play

 

Right then ive lost boost now
it goes upto .06 bar then drops too .04 then .03 any ideas

Done the normal checks no air leaks or nout like it

 

your turbo is fooked for starters

 

yhpm

 

Turbo pal. mine started like that, then sounded like a siren, then died

 

32 psi, turbo lasted 9 yrs??

 

defo not.................. it's 100% the turbo oil seals are fooked

 

Good

Who does every 1 use to rebuild them?

 

nah only been running that boost for last 3000 miles but turbo is 9yrs old according to the receipt but its only done less than 10000 miles since then

 

try Tony@Turbosystems or Vince@CRturbos