The datsun kid Posted July 10, 2010 Report Share Posted July 10, 2010 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. Quote Link to comment
wildmaninid Posted July 10, 2010 Report Share Posted July 10, 2010 White smoke usually equals coolant being introduced into the combustion chamber, usually blown head gasket. Bill Quote Link to comment
D@tsuks Posted July 10, 2010 Report Share Posted July 10, 2010 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. Quote Link to comment
dat521gatherer Posted July 10, 2010 Report Share Posted July 10, 2010 black smoke = fuel blue smoke = oil white smoke = water Quote Link to comment
WAGON JON Posted July 10, 2010 Report Share Posted July 10, 2010 No smoke= it is dead, not running, or got rebuilt. :P Quote Link to comment
datzenmike Posted July 10, 2010 Report Share Posted July 10, 2010 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. Quote Link to comment
datzenmike Posted July 10, 2010 Report Share Posted July 10, 2010 What's up if Lynch is blowing blue smoke? Quote Link to comment
Kevin S. Posted July 10, 2010 Report Share Posted July 10, 2010 What's up if Lynch is blowing blue smoke? He is running just fine............. Watch out if there is any sputtering....................... :w00t: Quote Link to comment
banzai510(hainz) Posted July 10, 2010 Report Share Posted July 10, 2010 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 Quote Link to comment
Cahoon520 Posted July 10, 2010 Report Share Posted July 10, 2010 Have you thought about putting it on the patch? Jokes Quote Link to comment
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.