my 240 smokes

[240sx1234]

alright so I have no idea where this smoke is coming from,its a white colored smoke that is coming out the exhaust.It will only come out though when I have been driving and then let it sit for a minute,and then rev the motor or start to go.It blows white smoke out and seems to be more the longer it sits,Ive checked the oil and the level hasnt moved but and is on the curve which im pretty sure is too much,but any help would be appreciated.

[s13silvia123]

blown headgasket

[93nismo]

rings maybe?

[epics13]

when u check the oil is it milky as in it looks as if coolant is mixed in if it is then it might be the head gasket, also what motor is this if the motor is turbo the seals might be bad.

[g-via]

are your coolant levels going down?

[locoluna825]

:Dmy 240 smokes honda's

[240sx1234]

its a ka24de

[KoukiDrifter240]

check valve cover breather and see if smoke comes from there and also if its not going down and no coolent then it could be valve stem seals

[seRu13]

its most likley the valve seals, nissan used crappy rubber for then and it wears out and causes the car to smoke. Pain in the ass to replace but relatively cheap.

[KoukiDrifter240]

its most likley the valve seals, nissan used crappy rubber for then and it wears out and causes the car to smoke. Pain in the ass to replace but relatively cheap.

+1 :zombie:zombie faces cool
how many miles on car?

[240sx1234]

134k miles

[Mangudai]

I thought bad valve seals would only cause black smoke?

[240sx1234]

so yes or no on the valve seals?

[Rabboni]

White smoke is caused by coolant, and only coolant. If the smoke was slightly blueish then that would be oil. Sounds to me like you have a bad headgasket, or, less likely, a cracked head. Watch your coolant levels, and check for milky oil as stated above.

[Mangudai]

Ah that's right oil is blue, fuel is black.

[Walperstyle]

NOOBIES LISTEN UP

White smoke = coolant
Blue smoke = oil
Black smoke = fuel, and maybe oil and coolant

ALSO, the smell tells you what it is.

sweet = coolant
oil usually smells..well like burnt oil
fuel usually smells like burnt fuel


holy crap noobism in this thread. If you don't know the basics, don't comment.

[240sx1234]

alright,so if im going to be taking my head off to change the headgasket before i turbocharge,what else should i change that is easy to get to with the head off?

[2forsexty]

NOOBIES LISTEN UP

White smoke = coolant
Blue smoke = oil
Black smoke = fuel, and maybe oil and coolant

ALSO, the smell tells you what it is.

sweet = coolant
oil usually smells..well like burnt oil
fuel usually smells like burnt fuel


holy crap noobism in this thread. If you don't know the basics, don't comment.

amen brother

[Walperstyle]

alright,so if im going to be taking my head off to change the headgasket before i turbocharge,what else should i change that is easy to get to with the head off?

Make sure when you take it off to keep track of where your dizzy and timing is at. Mark it if you can. Otherwise when you put it back on, you'll be here asking why your car is running like crap, or not at all.

If you are taking the head off, you may want to consider a mild port and polish and different cams. But thats if you plan on building up this engine or not.

If you go bigger cams, you'll probably have to adjust timing anyway.

but no, there is nothing else you really need to do. But make sure you don't get any debris inside the engine, when you clean the surface of both the head and block.

Cheers. Have fun doing the most annoying job on cars.

[240sx1234]

i shouldnt change valve seals,which I have read about on this thread?Im not planning on building it yet,just getting it mildly ready for ka-t,that is if the compression is good to go

[Walperstyle]

how mild? if you are looking for anything over 250hp, you will want an o2 gauge and a good tune.

valve seals are not necessary if its not leaking oil into the piston chamber. But yeah, its only a few bucks to change them, so its up to you and if you have the ability to keep track of your buckets, shims and springs and such when you dismantle the head.

[Walperstyle]

if you are really interested in knowing the KA engine in and out, www.240SXTECHDVDS.org Home Page (http://www.240sxtechdvds.org) has some amazing videos that work well with a FSM

[240sx1234]

im looking at getting around 250 for now,i plan on getting a dyno tune after i install everything turbo related. I will have it trailered somewherem,i have a aem wideband if thats what you mean by o2 gauge

[Okinawandrifter87]

Did you replace your headgasket yet?

[240sx1234]

no,I plan on changing the headgasket when I am doing everything else.I dont know which headgasket I should get though

[redline racer510]

you have a blown motor lol