92 240sx with 96 240sx ka it has water in dipstick :/

ONLY for ADVANCED technical discussion about the 240sx!
bigirv14
Posts: 8
Joined: Sun Jun 30, 2013 10:04 am
Car: 1992 240sx coupe

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Ok I have a 92 240sx with a 96 ka motor I had swap it in n since its been in my 240 it's smoking a lot and the smoke is white I checked the dipstick n the level is high and it drips like water . And I'm thinking its the head gasket but my car runs perfect it just smokes everywhere n more when it's in a stop reving at low rpms. Any help on what to do ? :ohno: :facepalm: :wtf2:


daemonyk
Posts: 218
Joined: Wed Sep 19, 2012 5:26 pm
Car: '93 240SX

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Headgasket, at the least. Everything you've described are syptoms of that.

Blue smoke is oil, white smoke is water / coolant. If it's blowing white smoke, you have water getting into the combustion chamber. It is very possible to have a bad HG and still be able to "run fine". That just means that you still have enough compression / combustion per cylinder to make the car go, despite the cracked HG. However, everything you've said, points to bad HG.

Try this. Take the cap off the radiator and start the car. If water starts blowing, thats a bad thing. It means the cylinder pressure is leaking back into the cooling system (which it isn't supposed to) and pressurizing it, thus blowing coolant out of the open radiator. With the cap on the radiator, the coolant escapes into the cylinder instead, and then you get white smoke.

mechanicalmoron
Posts: 790
Joined: Fri Apr 29, 2011 1:04 am

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Check if your coolant level has gone down.

If you have water in your oil, it will make a mixture that I've seen described as "chocolate milk". I'd assume it looks like if it rains into an oil pan, which is sort of like chunky half-mixed chocolate milk. It won't just be thinner oil.

Check if the oil smells like gas. It wouldn't be much better (especially if it seems to run fine) but there are things that could cause excessive smoking and gas in the oil because of richness, which would also raise the level (and the more you ran it like that, the faster it would wear everything, out, and smoke even more)

Exhaust colors are not always as firm or obvious as some make it sound.

That said, yeah, sounds like your head gasket. After checking what I said, you could drain your oil, just to make sure.

bigirv14
Posts: 8
Joined: Sun Jun 30, 2013 10:04 am
Car: 1992 240sx coupe

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Ok enough said the head gasket it is what's the best brand of head gasket out there ? That's strong n know to last and at a good price . And thanks for the help and opinions .

bigirv14
Posts: 8
Joined: Sun Jun 30, 2013 10:04 am
Car: 1992 240sx coupe

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Ok I'm going to replace the head gasket my self it's my first time so any tips on how to do it ?

jesteratc
Posts: 148
Joined: Thu Mar 15, 2007 3:07 pm
Car: 91 Festiva DD
92 240sx Sr20det Fun
2012 Kia Soul Red Rock Edition (Wifes DD)

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Ive done this job twice, so from my own experiences.

I just picked up a new head gasket from the local Autozone or advanced auto.
Make sure that you have a guide for torquing down bolts for re assembly.

Every time ive done this job i had another person to help. One person takes apart one side the other works on the other. Example one person does exhaust side, the other does the intake side.

I always ended up doing the intake side. More of a PITA if you ask me. But at least i didn't have to worry about the EGR tube that goes behind the motor. Another suck a** job.

Anywho. Try not to take off any unecessary parts. For example. You can undo the bolts holding the head on after removing the valve cover gasket. Basically lifting the whole head assembly off in one shot. Its going to be a good 8 hrs if your lucky. Best ive done is 6 and we were both exhausted.

Remember to Bag and tag every bolt you take off, cause when you have it all dissassembled it will be like. hmm where do all these bolts go.

My last final piece of advice. MAKE SURE to have a straight edge for checking the head for warpage. The last time i did a head gasket on my KA24de i checked the block and it was warped around .025 which is not good. I knew if i put it back in that way it would just blow again. So make sure to check for a warped block. Otherwise plan on replacing it.

Best of Luck.


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