help pls. 1983 4x4 nissan 720
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bigrigin123
- Posts: 1
- Joined: Mon Feb 06, 2012 6:17 pm
- Car: 1983 Nissan 720 4x4
help pls. 1983 4x4 nissan 720
I have a 1983 nissan 720 4x4 2.4L 5 speed. its giving me trouble and i'm not sure wat to do now. i was driving it down the road and all the sudden it started smoking from the exhaust and a lil bit at the engine compartment wats anybodys advise on wats wrong with it?
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Bloodman324
- Posts: 112
- Joined: Sun Jul 03, 2011 9:02 pm
- Car: 1981 Datsun 720 Kingcab 2WD Automatic
Re: help pls. 1983 4x4 nissan 720
Is the header tight? and are there any leaks in any of the exhaust pipe?
Re: help pls. 1983 4x4 nissan 720
How much smoke? and what color is the smoke? that'll tell you a lot when it comes to troubleshooting it, as well as how quickly did it start to smoke, gradually or "it was ok a second ago and now it's smoking bad"?
Here are a few reasons for smoking out of the exhaust...
Only when it's cold and goes away as it warms up: valve stem seals are worn, they'll smoke at startup but not when the engine is warm, Easy fix
It was fine one minute, now Thick white smoke: Blown head gasket, the water and coolant leak into the cylinder and turn to steam hence the thick white smoke, performance usually but not always decreases considerably, engine may be hard to start. Easy to moderate difficulty fixing.
Light bluish gray smoke that gets worse when you accelerate: That's the piston rings, this type of smoking is usually constant light smoking but can smoke much more heavily when you press on the gas. Overhaul time, you can just re hone the cylinders and replace the rings, but ya might as well do a complete overhaul if you're gonna do a ting job.
Black smoke: running too rich, it can be a hint of black smoke when you accelerate to a thick diesel like black smoke, check for a stuck choke or a very dirty air filter, can also e caused by a stuck float or a bit of dirt on your needle and seat valve.
Here are a few reasons for smoking out of the exhaust...
Only when it's cold and goes away as it warms up: valve stem seals are worn, they'll smoke at startup but not when the engine is warm, Easy fix
It was fine one minute, now Thick white smoke: Blown head gasket, the water and coolant leak into the cylinder and turn to steam hence the thick white smoke, performance usually but not always decreases considerably, engine may be hard to start. Easy to moderate difficulty fixing.
Light bluish gray smoke that gets worse when you accelerate: That's the piston rings, this type of smoking is usually constant light smoking but can smoke much more heavily when you press on the gas. Overhaul time, you can just re hone the cylinders and replace the rings, but ya might as well do a complete overhaul if you're gonna do a ting job.
Black smoke: running too rich, it can be a hint of black smoke when you accelerate to a thick diesel like black smoke, check for a stuck choke or a very dirty air filter, can also e caused by a stuck float or a bit of dirt on your needle and seat valve.
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dreadsiren
- Posts: 41
- Joined: Thu Nov 03, 2011 3:11 pm
- Car: nissan 720 1982-1985
- Location: 'up in the sticks' MT
Re: help pls. 1983 4x4 nissan 720
check your plugs... pull each one individually and check for oil buildup... could be a ring going out on ya, make sure you don't have a hole in your manifold or in the exhaust gas tubes... had that happen once. but yes, need smoke color and if you can figure out approx where in the engine compartment your smoking from (ie, exhaust manifold, breather on valve cover, backfire from carb, exhaust gas tubes (2 tubes between exhaust and intake) would really help in diagnosis 