Rough running, then no start after head gasket swap

[Honky Kong jr]

Or a cracked head maybe. This may sound ****** but not intended to.....I have a nice set of World heads for cheap. I hope it isn’t that but all depends how bad it was overheated and for how long it was run after the gasket blew.

 

[Crispy]

Time will tell at this point. I'll have an update later from the dark depths of my back yard after I check a few vacuum lines and harness, that ecm fuse, and the plugs. My timing light has a bad bulb so I have to get my hands on one and see if its in time after I get it running again.

Another member on here that's a little closer to me has a set of rebuilt heads that I might take up on should I need them (hopefully not). Are those world heads tbi friendly?

 

[Honky Kong jr]

Time will tell at this point. I'll have an update later from the dark depths of my back yard after I check a few vacuum lines and harness, that ecm fuse, and the plugs. My timing light has a bad bulb so I have to get my hands on one and see if its in time after I get it running again.

Another member on here that's a little closer to me has a set of rebuilt heads that I might take up on should I need them (hopefully not). Are those world heads tbi friendly?

That TBI intake has bolts at a goofy angle don’t they? They are 76cc chambers with 1.94” valves they are S/R heads

 

[Jrgunn5150]

That TBI intake has bolts at a goofy angle don’t they? They are 76cc chambers with 1.94” valves they are S/R heads

The center two are straight up and down, grinder to the intake will clearance them.

 

[Honky Kong jr]

The center two are straight up and down, grinder to the intake will clearance them.

Ok I thought there was something weird with them I know Vortec stuff is way different ( I put Vortecs on my S10)

 

[Jrgunn5150]

Correct, Vortec requires a completely different intake.

 

[Crispy]

Update

I pulled the 4 plugs on the pass side,the side with the previously busted head gasket. And found 3 of the 4 to be firing nicely. Cylinder 8 which was where the break in the gasket was is oil fouled. I cleaned it up and reinstalled it. I also gave the distributor a little advance in timing and it fired right up. I shut it off after about a minute. I didnt have much time as I had somewhere to go so Ill explore more tomorrow when I have the timing light.

Any thoughts on this?

 

[Honky Kong jr]

Update

I pulled the 4 plugs on the pass side,the side with the previously busted head gasket. And found 3 of the 4 to be firing nicely. Cylinder 8 which was where the break in the gasket was is oil fouled. I cleaned it up and reinstalled it. I also gave the distributor a little advance in timing and it fired right up. I shut it off after about a minute. I didnt have much time as I had somewhere to go so Ill explore more tomorrow when I have the timing light.

Any thoughts on this?

Broken ring, bad valve seal?

 

[Crispy]

Im thinkin maybe i didnt set rocker properly so the valve is lettin in some oil from the valvetrain. Hopefully its that and not a ring although that was the cylinder that was full of coolant. When I pulled the old plug it wasnt oil fouled, it was nasty from the coolant though.

 

[Honky Kong jr]

Im thinkin maybe i didnt set rocker properly so the valve is lettin in some oil from the valvetrain. Hopefully its that and not a ring although that was the cylinder that was full of coolant. When I pulled the old plug it wasnt oil fouled, it was nasty from the coolant though.

3 ways oil can get in a specific cylinder rings, head gasket or valve seal

 

[VAL]

I had the same issue when I replaced the heads on my Yukon. I had over adjusted the rockers. I loosened them up a bit and fired right up and stayed running.

 

[Honky Kong jr]

I had the same issue when I replaced the heads on my Yukon. I had over adjusted the rockers. I loosened them up a bit and fired right up and stayed running.

Haven’t seen you on in awhile

 

[Crispy]

I know how to bring em out of the woodwork haha. So working in the dark last night was a pain so its gonna wait until the weekend but I'm going to adjust my rockers again. Tonight I'll use the dark to my advantage and check the timing.

 

[henrym]

check for a grounded/melted wire, since this didn't happen until it got to operating temp (hot). You may have a wire too close to the engine or exhaust, and a wire resting against it may have melted.

 

[RustyPile]

Im thinkin maybe i didnt set rocker properly so the valve is lettin in some oil from the valvetrain. Hopefully its that and not a ring although that was the cylinder that was full of coolant. When I pulled the old plug it wasnt oil fouled, it was nasty from the coolant though.

Misadjusted valve lash won't cause oil to get in a cylinder.. Adjusted to loose and they make noise.. Way too loose and something might break.. Adjusted too tight and the engine will exhibit the symptoms of a burned valve -- engine miss associated with that cylinder -- low or no compression -- popping back through the carburetor -- etc...