Hi

 

Literally just bought a 300zx twin turbo and done a 300mile trip to get it home. I didnt notice anything at first but when i was closer to home i decided to floor it and see what the car was made of. Did about 100mph in third gear and it filled the whole road up with grey smoke!?

 

Im guessing this is going to be bad news .......?

This may, or may not be your problem, as this'll be difficult to check on for sure.

What you've described here certainly sounds the same as happened to my old Zed, flooring her and under heavy acceleration she would blow large quantities of grey smoke out behind me. Traced it down to the rear crank seal that was leaking oil into the bell housing under pressure. This in turn has a hole in it which allows the oil to 'drip' out. Now when you're moving at some speed this 'drip' blows backwards directly onto the cats and smokes immediately giving your a James Bond smoke screen behind you!

A way to check this is to look under the car and inspect the bell housing, if it's all oily then you've found your problem! One new rear crank gasket required and the removal on the bell housing to fit it.

 

It's certainly something to consider, HTH,

Dave

Sorry.... one new crank seal required.... not crank gasket!!

seen that car before did you buy from ebay?

 

Yes bought off ebay

 

- - - Updated - - -

 

Sorry.... one new crank seal required.... not crank gasket!!

 

Cheers Dave

james do you mind me asking what you paid for that car ! I wont be upset if you dont answer for obvious reasons

there`s a thread about this car ... and it was on e-bay long time ... nice car

 

http://www.300zx.co.uk/forums/showthread.php?166631-Hey-guys-gals-New-owner-looking-for-a-bit-of-info&highlight=altia+sills

thanks for the find

Hiya

 

This car was on eBay the other day, looked awesome! Hope u get it sorted. When I looked at the listing it had lots done and lots of money spent on it. :)

http://www.300zx.co.uk/forums/showthread.php?166631-Hey-guys-gals-New-owner-looking-for-a-bit-of-info&highlight=altia+sills

 

To late now but if we (Mods or Committee) had of seen the comments on post 18 of that thread that dealer would of been dealt with and his thread removed. Sorrow for missing it guys as that is no way to speak long standing members of this fourm.

http://www.300zx.co.uk/forums/showthread.php?166631-Hey-guys-gals-New-owner-looking-for-a-bit-of-info&highlight=altia+sills

 

Thanks for that! Thats the guy i bought it off today

james do you mind me asking what you paid for that car ! I wont be upset if you dont answer for obvious reasons

 

Im not called James, if u were asking me :p

sorry the photobucket tag was james :thumbup:come on mods keep up lol with post 18

sorry the photobucket tag was james :thumbup:come on mods keep up lol with post 18

 

Was going to PM you the price i paid but there dosent appear to me that option so i cant!

Was going to PM you the price i paid but there dosent appear to me that option so i cant!

 

Did you pay by paypal or one of the other methods.

Did you pay by paypal or one of the other methods.

 

Cash on Collection!

hi

you cant pm unless you subscribe to forum

http://www.ebay.co.uk/itm/1994-NISSAN-300ZX-PEARL-WHITE-VERY-CLEAN-HIGHLY-MODIFIED-SHOW-WORTHY-CAR-/261186815012?_trksid=p2047675.l2557&ssPageName=STRK%3AMEWAX%3AIT&nma=true&si=Wo0s1nXT8DsCfo7GFclmKfDWW00%253D&orig_cvip=true&rt=nc

 

little gem! hope it gets sorted mate

Cash on Collection!

 

lol sorry we are getting mixed up here. To pm members you need to be a subscribed member mate.

 

http://www.300zx.co.uk/forums/showthread.php?132930-Club-Subscription-Benefits

http://www.ebay.co.uk/itm/1994-NISSAN-300ZX-PEARL-WHITE-VERY-CLEAN-HIGHLY-MODIFIED-SHOW-WORTHY-CAR-/261186815012?_trksid=p2047675.l2557&ssPageName=STRK%3AMEWAX%3AIT&nma=true&si=Wo0s1nXT8DsCfo7GFclmKfDWW00%253D&orig_cvip=true&rt=nc

 

little gem! hope it gets sorted mate

 

ta :)

Thanks for everyones help and welcoming!! Think ill take it to Zedworld asap and get them to completely check it over and see if theres any underlining issues! Hopefully all is good, its a great car and bloody fast :)

for the sake of few quid I think its worth getting it checked out and if you get bored of it I Will buy it as its now on my door step lol

If that guy really run 1.3 Bar i think it could be a head gasket :/

for the sake of few quid I think its worth getting it checked out and if you get bored of it I Will buy it as its now on my door step lol

 

Not selling :P

Few checks you can do.

 

First of all, check the coolant in the rad, make sure there is no mayo type substance in there, also remove the oil filler cap and check that also. check the dip stick is still in its little tube and secured in there.

 

next up

 

Start the car and take it for a pleasant drive, no boosting or anything, just get the temp up to normal. get back home and get out the car, let it idle for around 5 mins, then check the exhaust for smoke, if its smoking then make a note of the color, if its turbo seals it will have a blue ting too it and be heavy ish. if no smoke, give it a rev to around 4 to 5 k revs. and then ease off. again checking for smoke, if it smokes on revs, and the smoke is blackish and sooty, then its over fueling, if its condensation it will be white but dissipates quickly, if its turbo seals, it will have a blue ting too it and be quite heavy.

 

Pay attention to the car temp, if you have a after market temp gauge installed, this will be better, but if its the stock one, normal temp the needle will sit around half way up.

 

Does the engine idle smoothly, any juddering or anything like that? it should idle with minimal body vibration.

 

Tell tale signs of turbo seal failure are.

 

Smoking in idle after 5 mins of idle when engine is up to temp.

Remove intake pipes to throttle bodies and check for oil on the intake pipes, heavy oil means you have oil vapor getting into the intake system, usual suspects are the turbo seals.

Smoking on boost.

 

Other causes of car smoking

 

Too much oil, the oil needs to be around 3/4 up the dipstick check block. too much oil can actually cause the car to smoke.

knackered PCV valves, the PCV valves, knackered valves can lead to oil vapor built up in the upper plenum, this then condenses in the plenum and can form pools of oil, under hard acceleration, this can get thrown down number 5 and 6 cylinders from the valves and burn under ignition.

 

Bad piston rings, take it for a drive, bring the car up to temp, give it some good boost, pull over and check to see if the dipstick is still in the tube, if it had popped out, then most likely the piston rings are knackered and not sealing correctly and you are getting positive crank case pressure, you can also check by opening the oil filler cap (turn car off then do this) and seeing if there is any vapor coming out and if it smells like petrol. to confirm, you need to do a compression test and check the compression of each cylinder.

 

HG blown, usually accompanied by poor running engine, very lumpy idle and lots of white smoke out of the rear, can also be accompanied by mayo type looking substance in not only the oil, but also in the rad, or even a film of mayo on the exhaust exits, you can get a block tester kit to test this and do a leak down test.

 

To be honest though, the biggest cause of smoking from the rear is turbo oil seals, which is an engine out job (it can be done with engine in, but much easier to just pull the engine)

Edited March 21, 201312 yr by vodkashots

Thanks for everyones help and welcoming!! Think ill take it to Zedworld asap and get them to completely check it over and see if theres any underlining issues! Hopefully all is good, its a great car and bloody fast :)

 

 

Always happy to help but for your info Zedworld is in Coleshill not Leicester http://www.zedworld.co.uk

 

Jeff TT

Hi

 

Literally just bought a 300zx twin turbo and done a 300mile trip to get it home. I didnt notice anything at first but when i was closer to home i decided to floor it and see what the car was made of. Did about 100mph in third gear and it filled the whole road up with grey smoke!?

 

Im guessing this is going to be bad news .......?

 

In my experience with these engines its usually a sign of broken piston ring lands,under normal load they are will appear ok but as soon as you bring the car on boost youll get a smoke screen out the exhausts.Its worth doing a compression or leak down test first.