I have been running these PRC stage 1 heads for about 1000 miles now and havent seen any issues until today. I rolled into the throttle and at 4k rpm i got a message saying the engine was hot and it was killing the A/C. Sure enough it was running pretty warm and the hand was moving fast. I coasted down into a fire station and as i pulled in it was still getting warmer and so I killed it. Pop the hood...coolant everywhere on the passenger side. No hoses gone or popped so it took a second of looking over the water loop before i noticed the hole on the front of the head where the freeze plug goes. Had my wife get me, we bought a few gallons of coolant and a .74 cent dorman plug. Punched it in at the fire station and filled it up with coolant again. Let it get up to temp and made sure it was full before i capped it and drove home.

Anyone else ever have this happen?

 

Guess I am the only one. I'll keep everyone updated if I continue to have issues, but for reference the part I used was a dorman 555-024. That is a 1 1/4" diameter 0.3 depth steel plug.

 

Never heard of them coming out before. Maybe they didn't put it in all the way

 

yes since alot of places dont seal them in place or tap the corners to seat them


saw this couple times on boosted motors

 

Do you remember what Part # that plug was? Mine is leaking and I want to change it out. Thanks

 

the part number is already listed above...

 

Woww I'm blind. thank you!

 

A long time ago there was a member here that did at the track and if I remember right, it put him in the wall.

Big boost stock head **** gets aluminum plugs welded up if it comes from my shop.

 

This engine is getting pulled soon anyway, is it worth taking out the stock freeze plugs and welding in Aluminum plugs?

 

I literally tapped in a new part, filled the coolant and drove the truck home after this happened. I never had it happen again in the few thousand miles I continued to run that setup. I have since had the heads reworked again with about 3500 miles on them now without a problem. I think it was just a fluke where it wasn't in correctly the first time.