blue smoke....

[240sx_in_209]

my cuz is going to buy a 91 240sx and for 600 its clean just minor dents but clean inside but is blowing out blue smoke.. i told him it was oil. but it dont do it till u drive it for like 10 mins then it smokes.... when it just sitting there nothing it runs fine and everything no smoke of any at all.. is it the piston rings or can it be soemthing els...

[supreamS14]

Could be a valve stem seal

[240sx_in_209]

hm.... then why would it be the blue smoke? because it takes a while for the smoke to come out.... when it fisrt start up.... the exhaust smells like nothing.... nothing of oil but when we drove it i started smoking

[scottydog]

Blue smoke=burning oil

When the oil heats up it's leaking around either worn valve stems or bad piston rings into the combustion chamber. Have you done a compression check?

In either case the engine need internal work.

[YR240]

Is there a Head Rebuilding Thread, or how do you replace the Valve stem seals?

[BigMACKenzie]

you need two things YR240: 1.) SEARCH MOAR! 2.) a factory service manual or FSM [URL] http://www.240edge.com/manuals/usdm-cars.htm

[Hijacker]

9/10 says it's valve stem seals. It takes a few minutes for the seals to warm up and expand to let the oil seep past them into the cylinder.

If it were rings, you'd be chugging smoke all the time.

[nismoboy92]

hes rite.my buddy had the same prob.2 weeks later it got alot worse and smoked alot more.it was the valve stems

[240sx_in_209]

yeah it makes alot of sence.. thanks alot guys.... ahhah the funny thing is that now my car is doing the same thing which sucks.... anyone know how had is it to replace them?

[nismoboy92]

my own personal experience i didnt think it was that bad.you just gotta have the patience to take the head off.lol

[240sx_in_209]

can it be done with the head not taken off?