shizzl Posted October 2, 2010 Author Share Posted October 2, 2010 so many things could be causing the smoke, atleast now i have an idea of other things to check aswell as the turbo.. cheers and that would explain why my old cortina smoked hard when i backed off the gas but never when i put my foot up it....i thought she was dead so i traded it in...dang Quote Link to comment Share on other sites More sharing options...
shizzl Posted October 8, 2010 Author Share Posted October 8, 2010 so ive got this van home now... the smoke is mainly black, to me is fueling.. there is a hint of blue...no noticible noise form the turbo or anything... but whats got me is there is a lot of rocker cover pressure,its got a hose coming off the rocker covers, if i put my hand over the end of it it will blow my hand off after about 5-10secs... she doesnt sound to have a munted piston... suggestions? Quote Link to comment Share on other sites More sharing options...
kpr Posted October 8, 2010 Share Posted October 8, 2010 when does it smoke man, all the time, idle.. etc? checked how much boost its running? Quote Link to comment Share on other sites More sharing options...
shizzl Posted October 8, 2010 Author Share Posted October 8, 2010 no smoke at idle....it did when i first fired it up but had been sitting a while...didnt smoke when i fired it up this morning... when you put ya foot up it, it smokes heavily like a 70s granny, not hardcore black, probably more dark grey,and stops as soon as you get off the gas... Quote Link to comment Share on other sites More sharing options...
RUNAMUCK Posted October 9, 2010 Share Posted October 9, 2010 excessive crankcase pressure is symptomatic of over-taxed/butt-fucked top rings. Thats pretty commen with engines that have been +T'd. The good news is it doesn't neccesarily mean that your oil control rings are mitsubishi'd. (I've had supercharged motors which had mad blowby, but have burnt no oil) Just plumb it back into the intake and boost hard. Quote Link to comment Share on other sites More sharing options...
shizzl Posted October 9, 2010 Author Share Posted October 9, 2010 at the moment the hose on the rocker cover is venting to the atmosphere, gas is cleary coming out, but tehres no colour or mad odour from it. may plumb it to a catch can... i had thought of blow by... Quote Link to comment Share on other sites More sharing options...
kpr Posted October 9, 2010 Share Posted October 9, 2010 hmm sounds like its just running too rich if its black/fuel. does it do it at part throttle, or just when your hard up it? if turbo is not working will do this. if turbo is working. turn the boost up and see if it stops or smokes less Quote Link to comment Share on other sites More sharing options...
shizzl Posted October 11, 2010 Author Share Posted October 11, 2010 ok so i dropped the down pipe off the turbo and the back end was dry as.no oil. comp housing was wet, not drowning just wet.. bugger all shaft play,about normal id say. shaft spins freely,no noises,blades all look sweet. next idea?? engine slogged out to oval?? causing the blowby Quote Link to comment Share on other sites More sharing options...
shizzl Posted October 18, 2010 Author Share Posted October 18, 2010 so i found out ive got a nissan spec ht18 turbo sitting in my shed, its the same mount as the l20et turbo, but has a 3 bolt exhaust flange where as the l20et has a 4 bolt flange..dingo.. i figured that the l20et turbo is still ok.. i took the manifolds off the ld28 and there was oil present in pretty much all intake ports exhaust ports were black but dry.. excessive blow by im thinking...so good bye to this engine.. hope to find another engine asap. get it on the rd then try to get a motor for the stockcar... anyone need a ht18 turbo for a nissan??? Quote Link to comment Share on other sites More sharing options...
kpr Posted October 18, 2010 Share Posted October 18, 2010 not sold on the blow thing. did you check the turbo was making boost with a pressure gauge? Quote Link to comment Share on other sites More sharing options...
shizzl Posted October 18, 2010 Author Share Posted October 18, 2010 yeah consistant 7psi every time ae.. Quote Link to comment Share on other sites More sharing options...
Requiemk Posted October 18, 2010 Share Posted October 18, 2010 take turbo inlet pipe to inlet manifold off, place sock/mesh over inlet flange and drive. note results. if they are the same its not the turbo etc Quote Link to comment Share on other sites More sharing options...
shizzl Posted October 18, 2010 Author Share Posted October 18, 2010 yeah done that,same result... sounded friggin bad ass too...love the sound of a turbo winding up with an open snout Quote Link to comment Share on other sites More sharing options...
kpr Posted October 18, 2010 Share Posted October 18, 2010 yeah consistant 7psi every time ae.. double it a least, i think the smoke is the engine laughing at the lack of boost. tryed adjusting the injector pump? Quote Link to comment Share on other sites More sharing options...
shizzl Posted October 18, 2010 Author Share Posted October 18, 2010 havent touched the pump other than backing off the fuel a whole turn.. smoke went from grey to whitey blue.. you reckon more boost? Quote Link to comment Share on other sites More sharing options...
kpr Posted October 18, 2010 Share Posted October 18, 2010 ah nar. if its just white/blue smoke now, boost aint gonna fix that sadly. Quote Link to comment Share on other sites More sharing options...
shizzl Posted October 19, 2010 Author Share Posted October 19, 2010 anyone got a nissan turbo with a 4 bolt exhaust flange that they dont need? would be keen to borrow/buy to rule out if its the turbo or not... chur Quote Link to comment Share on other sites More sharing options...
kyteler Posted October 19, 2010 Share Posted October 19, 2010 Maybe. I think I biffed all my turbo stuff out... I'll check round at my brother's tomorrow/later this week. Will let you know. Quote Link to comment Share on other sites More sharing options...
shizzl Posted October 19, 2010 Author Share Posted October 19, 2010 choice Quote Link to comment Share on other sites More sharing options...
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