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i was with a buddy tonight we were racing and it started leaking antifreeze. We started looking around and a freeze plug on the back of the block blew out how did that happen? and how do i put a new plug in the back of the block? It is and 2003 thanks rich
programmers don't detune when the engine is cold and when the thermostat is closed the pressure the water pump creates in the block will blow the freez plug out of the back of the head. it is a common problem. and some truck can have it happen when the thermostat is open, some body sells a kit it is a plate that goes over the opening and holds it in.
I blew mine about 5 months ago. I had just got the TNT software that raised the rpm's a little bit. I was trying to get my tune--fine tuned by doing several WOT runs north of town.
After much research, the concensus is the warmer than normal engine--from the 8-10 WOT runs and the higher rpm's causing more coolant pressure in the block pushes the freeze plug out.
I found a replacement plate from Enterprize Engine Performance to plug the hole. It is a billet aluminum plate with 3 holes that match holes on the back of the block to attach it.It has a machined plug with an o-ring to plug the hole. I had to remove the right front tire and the inner fender liner to be able to get to the bolts. But I was able to install it without dropping the tranny.
It cost about $45 before shipping. It wasn't easy to get installed, but at least I didn't have to pull the tranny.
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