ca engine trouble......help!?

[NITE KIDS_S13]

hi im from ireland and have just purchased a '91 nissan 200sx s13 with a ca18det. i got it for very little money as its in quite a tired state, so i've decided to save it!!:icesangel the turbo was blown and the big end bearings were also gone. i have since replaced them and washed out the whole exaust system but it still seems to burn oil i have not much experience with these particular engines so would greatly appreciate any help on where to start on the CA other than valve stem oil seals or rings??? thanx;)

[Trigger]

we really dont have alot of info to help...all i can say is make sure all your seals are good..like oil pan,head and valve cover. How much oil is it burning? does it ideal rough?

[pulsar gtr]

Well if it burns oil, it could be cause by few things, piston rings are worn out or valve seals, or blown turbo. but you already replaced the turbo, assuming that it is still good.I would do a leak down test and a compression test and see what results comes out.chances that you need to replace the rings.check if your car smokes first thing when you start it in the morning, if it does. valve seals are gone.

I hope that helps,

PULSAR GTR

[boost_boy]

I would either get another motor or prepare for a complete rebuild and save yourself the headache.

[NITE KIDS_S13]

thanks for the help lads no it doesnt burn any on start up or at idle, its just after being on boost for a while that blue oil smoke starts blowing its not bad but its there. whats the ca like for rebuiding?? i dont mind builing engine's ive done many before just not a CA. its time consuming too and i HATE buses!!!:D

[boost_boy]

Your turbo's seal is failing (Normal). CA18 aren't that much of fuss to rebuild as long as you have all the parts you're going to replace on hand and ready to be installed.

[NITE KIDS_S13]

ok...which seal is this?? oil feed??

[boost_boy]

My bad, I saw in your initial post that you replaced your turbo already. Now the question is, did you replace the turbo with a new unit or a 2nd hand one? And did you have the head recondidtioned yet? So many little things to worry about that can cause this issue.

[NITE KIDS_S13]

na second hand one but i drove the car i took it off and it was perfect (written off from the back) so i replaced the turbo unit as a whole/ so which seal is it were talking about??

[boost_boy]

The internal oil seal of the turbo!