I recently imported a 1990 80K tt,for the first week no problems at all,i get the alarm fitted taken it down the paint shop to book it in to get it looking perfect,takes it to the exhaust shop and here is where it goes all wrong.

I have a system fitted from the down pipes back removing the cats,next day the thing is blasting out light blue smoke on tickover :headvswal.Ive read the seals in the turbos have gone weak and by the reduce in back pressure is what is causing the smoke,so if i replace the cats will it cure the problem or am i looking at replacing the turbos?

if blue smoke started after you decatted then it means that your turbos were on there way out anyway & by decatting its highlighted the problem. some peeps use thicker oil for a temporary fix (eg) castrol 10/60 or you could try refitting cats, do you know whether there still the orignal turbos ?

or try changing your pcv's to reduce crankcase pressure as well if they are gunged up

yeah turbos are deffinatly original ,i guess by fitting the cats back on and using different oil is just hiding the problem if there on the way out,geoff at zed world said about the pcv's but he thought by the amount of smoke it wasnt really gona be them,

thanks for the replys,looks like i'v got to find 1500 quid lol