Locorotc |
September 8th, 2018 10:06 PM |
Good evening, I know it has been a while since logging into here and since posting about this truck, but here these past couple of weeks I have been working on the old '93. I replaced all the gaskets topside, pulled both heads off and cleaned under them and the piston heads, replaced every spark plug, wire, gasket, and changed the oil since getting antifreeze in the oil from pulling the heads. I put everything together and started filling the coolant up when the head started leaking, once again tore it down and cleaned it up, not too sure why it was leaking when the gaskets were flush and sealed, so I resealed them and torqued everything down as I did before. I get it all back together, put the number 1 cylinder at top dead center and then refill the oil since I did not fill it after taking the engine apart the first time. I get it all 100% together, check and make sure everything is tight and then I hook up the battery and try starting it and I get rotation but no start. I pull the number one plug and check for spark and sure enough have spark, I check the TBI and see if I'm getting fuel and yup there's fuel there. I decide to put the engine at TDC and pull the distributor cap and find the rotor at 180 off so I fix it back to number 1, put it all back together and I try starting it again, I get backfire and then crank that's it. I am continually trying to crank it and it will occasionally backfire with still no start. I'm not too sure what it could be. Here's a list of everything that's been replaced: head gaskets, intake manifold gaskets, valve cover gaskets, rotor button, distributor cap, all wires, all spark plugs, water pump gaskets, TBI mounting gasket, oil pressure sensor, both coolant temperature sensors, pcv valve, and the TBI is used off a donor 1993 5.7L at a salvage yard. I see the TBI spraying fuel, I unplugged one and tried starting it and nothing, tried unplugging the other one and plugging the first one back in and starting it still nothing. I bumped the ignition to achieve TDC as well as manually placed it. I really hope this thing didn't jump timing and I hope that the timing chain isn't bad. The engine sounds different than before I took it apart, it sounds a lot tighter, like maybe the starter cant spin the engine fast enough to start it, but it sounds like all you hear is the starter when you engage the key. Could the specs in the Haynes manual be incorrect for the rocker nuts? The book says nothing about the 5.7L torque so I went with the 7.4 since it was a little more than the 4.3L but I'm thinking it may be too much, anybody have the torque spec for it maybe? And anybody agree with me on the torque being too tight? Again any help will be appreciated, I am willing to try anything. I apologize for the long posting.
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