This is a 4.3 Vortec, 4WD, LT w/118,000 miles.

I have replaced the water pump and passenger side, front freeze plug and was convinced the problem would be solved. I replaced the coolent, idled the engine for approx 30 mins with no problem. I drove approx two miles and it overheated. There is no evidence of leaking in repaired areas and I can now see coolent coming from what appears to be a round hole in possibly the transmission. This is directly behind the oil pan. Any help would be appreciated.

 

does this have freeze plugs inbetween tranny and motor

 

may be heater core hose

 

There are two feeze plugs in the back of the block. Would be behind flex plate.

 

Also check your intake manifold gasket

 

Does the hole I described make any sense? I doubt it's the tranny per se but it's in that area. I can cover this hole with finger and when finger removed, coolent definately coming from hole. The hole is approx 1/4" diameter. If it's leaking from the rear frost plugs, would this hole be the exit route?

I appreciate your thoughts.

 

yes this is the route it would take remove the tranny dust cove fill with fluid usa a flash lite to look between tranny and motor

 

Thanks, I'll get that dust cover pulled and see what it looks like.

 

I removed the dust cover and exposed the flexplate and torque converter. The coolant is definately coming from this area but there is no way that I can tell, to see the frost plugs. I hate to ask but what else would need removed to view them and what is required to replace them if that turns out to be the problem? Does the tranny need removed? Motor?

Thanks.

 

maybe the block cracked between the flexplate and motor