my truck smokes!!

[The datsun kid]

so my truck started blowing white smoke out the tail pipe and it smells like fuel and it only does it when you accelerate but dosent when it just idles soo... any help would be good thnx!! oh its a 71' 521 stock motor and i have no idea what carb is on it.

[wildmaninid]

White smoke usually equals coolant being introduced into the combustion chamber, usually blown head gasket.

 

Bill

[D@tsuks]

White smoke means your burning oil if it was running rich (more fuel) it would be black smoke. Likely to be worn valve guides, stem seals possibly piston rings.

 

 

[dat521gatherer]

black smoke = fuel

blue smoke = oil

white smoke = water

[WAGON JON]

No smoke= it is dead, not running, or got rebuilt. :P

[datzenmike]

If you have never done this before know how to lock the timing chain so the tensioner cannot fall out. Motor must be at TDC compression on #1. Do not rotate the cam once the head is out. Do NOT rotate the motor. Drain the rad.

 

 

Disconnect everything but leave the intake and exhaust manifolds on. Removing the carb is optional... if careful, leave it on. This saves a bunch of BS and broken rusty bolts, skinned knuckles. Lift head and manifolds off together. Tilt the head up just enough to clean the surface thoroughly. Don't loose the two alignment dowels that may stick in the block or the head. Clean the block cleaner than clean. Yes you can reuse the head bolts if they are undamaged. Threads and holes must be spotlessly clean. There is a pattern for tightening the bolts. Tighten in 3 stages 20 then 40 and a final 60 ft lb.

[datzenmike]

What's up if Lynch is blowing blue smoke?

[Kevin S.]

What's up if Lynch is blowing blue smoke?

 

 

 

 

He is running just fine.............

 

 

 

 

 

Watch out if there is any sputtering....................... :w00t:

[]2eDeYe]

:lol:

[banzai510(hainz)]

buy the Haynes manual!!!!!!!!!

take a photo of carb.

 

ck your water level and see if water loss.Every L motor guy will change a headgasket sooner or later.

 

ck the intake manifold bolts upper and lower . if loose it can suck water thu the water heater manifold line that goes to the head. The 2 inner cylinder migh be very clean on the spark plugs is a sign also if this. or just suckin in water from headgasket.

or blowing exhaust gasses in to the radiator. so see if over pressurizes

 

all elese fail let us now its for sale

 

 

This is a EZ fix .

 

 

olddatsuns.com

[Cahoon520]

Have you thought about putting it on the patch? Jokes