Went Up In Smoke
 

right have a slight issue with my s12, was playing with a calibra, pissed all over him and then had lack of power and big cloud of smoke behind me, cam belt isnt snapped or skipped teeth, runs but sound like only on 2 cylinders. im thinkin piston rings but not certain, any advise would be apreciated

Did you top speed it?

Sounds like a holed piston to me. Remove the oil cap and see if it spits lots of oil out due to the excessive crank case pressure

i was doing about 140 when it happened, smoke comes out the oil filler cap, white smoke

Sounds about right.

What spark plugs are you running?

the colder ngk ones bcpr78es or sumthing liek that

Hmm, using them should stop the problem unless there is something wrong with the timing or fueling.

This is the expected damage:
http://img.photobucket.com/albums/v2...F0009small.jpg

I would do a compression test to tell. I suspect you've got damage to number 3.

the timing has been retarded from what i was told to 15deg btdc. i am running 11 psi tho

Well 15 degs is standard.
Are you running an intercooler?

had excatly the same thing but on a toyota corolla,it happened at 5500rpm and smoke was pouring out the breather on the rocker cover,when stripped down it was a holed piston

grim sorry to hear that

s12s dont like doing 135+ with the standard fuel pump and increased boost.

i suspect you have holed a piston or at the least blown the head gasket.

chuck a 50 quid replacement engine in her.Put a wanted ad up

there's a good engine up here for £50;) .

i'll take that engine!!:D :D
i'll have the cash in less than 2 weeks:cool:

ok dr, sorry about that:o , i din't think you could get up for it, i'll save it for you, tomo will be pleased, more tuning money.:cool:

http://cgi.ebay.co.uk/Nissan-Silvia-...QQcmdZViewItem

this is on ebay. £50 atm

thanx for input peeps, mite have that engine on fleabay, so its not worth doing the work required to my old engine???

My two cents

it'l cost you a packet.
as far as i see it there is very little point in rebuilding an 8v bottom end, but im going 16v so i would say that wouldnt i:p

unless you're planning on hoding onto that car for a long time, it wont be financially viable...
find another engine to put in or build a det:D

What about working with s12's doesn't cost a packet though Doc Silvia? :p :o

lol fair point, but £50 versus in the region of £1000+ from a nissan dealer...:1la
its probably cheaper to buy low compression pistons than new std ones if i know nissan:rolleyes:

£50 for a working engine is a pretty good deal, bearing in mind how long these cheap powerplants last compared to other similarly priced lumps i can think of.