okay soo my friend and i just replaced the head gasket and then we had a problem with the timing now we got it to start i know the timing is a little off but theres alot of white smoke coming out of the muffler and some out of the carburetor i dont know what to do anymore i have a 91 chevy silverado 1500 5.7 liter can anyone help??
2007-12-30 15:39:36 · 6 answers · asked by ken m 1 in Cars & Transportation ➔ Maintenance & Repairs
i didnt get heads surfaced by a machine shop..umm i torqued the heads perfectly lke the book said i did both head gaskets.. i put rtv around the water inlets like the book said
2007-12-30 16:09:19 · update #1
could be water in the oil. or if you have a diesel engine with a turbo on it there could be an issue with that. do you have a mod chip in the computer?
2007-12-30 15:44:29 · answer #1 · answered by BG 2 · 0⤊ 0⤋
1st, I think your truck has TBI, basically an injected carb. Second, your motor has two head gaskets, one for each side. I hope you did both, the increased pressure from sealing up one side may expose a bad gasket on the other side.
If the smoke reeks like coolant, then theres coolant getting into the combustion chamber, recheck your torque on the heads, makeing sure you use the specs for that year, not an early 350. While most everything is the same for 350's, some specs changed with the intro of throttle body injection and so on. You may have to tear it back down and inspect the gaskets for the problem. Sometimes a bit of crud gets in there and pooches the whole thing. If you had a gasket set with a sticky side, make sure the paper was taken off too ( sounds silly, but happens a bunch on gaskets).
If it reeks of fuel, clean out the throttle body and choke. Then look towards sensors for a sticking/overheld choke.
2007-12-30 15:55:43 · answer #2 · answered by cv202 1 · 0⤊ 0⤋
Did you completely disassemble the carburetor? If you did, what did you do with the float? Did you set it somewhere and let it dry out? If it's one of those black polycarbon or plastic floats they started using in the late 70's early 80's, you can't let those floats dry out once they have been exposed to gasoline. It will cause the engine to flood. The other thing could be if you did not completely take the carburetor apart and you were turning it upside down and whatnot, the check ball was either displaced or stuck somewhere and preventing the extra fuel from entering the throat of the carburetor causing the lean air/fuel mixture.
2016-05-28 04:25:39 · answer #3 · answered by ? 3 · 0⤊ 0⤋
Did you replace both head gaskets???????? and did you have the heads surfaced by a machine shop ??? and are you absolutely sure that you have torqued the heads correctly??? if all of these are a yes then you might have a little left over coolant that got into the exhaust system and it will burn out but if you are not sure about the first three questions then you may have just spent a lot of time and money for nothing LOTS OF LUCK!!!!!!!!!
2007-12-30 15:51:35 · answer #4 · answered by rray1952@sbcglobal.net 2 · 0⤊ 0⤋
White smoke is water/antifreeze. When you took off the heads, I'm sure you spilt a lot into the block, so don't get excited. A little anti-freeze makes an awful lot of smoke, but if it doesn't stop then maybe you torqued in the wrong sequence or the head is just warped and should have been milled.
2007-12-30 15:51:08 · answer #5 · answered by Bob H 7 · 0⤊ 0⤋
Pressure test the cooling system, it sounds like you may still have water entering the combustion chamber like from a cracked head. without knowing a few more details it is hard to answer this one
2007-12-30 15:45:43 · answer #6 · answered by yp_thomas_rogers 1 · 0⤊ 0⤋