Like it says..Freeze plug in front of the block has blown out for the 2nd time. Same one each time. Both times it has been in 2nd gear flooring it about 5k rpm. Dont know if this is completely by chance or if theres something happening...I replaced it the first time and have driven around for 3 weeks with no problem until now. Any suggestion on what to do to make sure this doesn't happen?

 

Only use factory plugs. Put locktite bearing compound on them, and do not use a socket to hammer it in.

Fathouse

 

I used lock tite and oem last time. I did use a socket to hammer it in though. What do you suggest that is going to be better than a socket and why does a socket not work?

 

did you try to re torque the head after you ran it because you are supposed to let it do a heat cycle and then re torque the head. it sounds like you are lifting the head and pressurizing the coolant system try that too also dude after you fix it

 

I have already retorqued head. Did it after about 500 miles.

 

Tack weld them to the block

 

Some builders also drill and tap on both sides of the opening and then screw a strap over the plug to keep it where it belongs...

 

you want a material that is softer than the plug itself. tool steel is too hard. If you could find an aluminum or brass plug of the right size that would be ideal

 

Will prob throw some welds on it this time. Also going to use evans coolant which from what i understand doesn't build pressure.

 

Replace your headgasket with a premium unit such as Cosworth or Power Enterprise.

I think you will have a hard time welding a plug to cast iron.

 

Factory evo 9 gasket is good for a ton of power.

A socket on the inside of the plug will stretch out the material and deform the plug as you hammer it in. Use a seal/bearing driver that fits flush with the OD of the plug.

Tack welding is fine, If the engine was out of the car you could tap the hole itself and just use a big plug.

Fathouse

 

wow second time that sucks... so did you do any measurements on the cylinder head to make sure it's not warped? How about the block deck? I had a freeze plug come out on mine recently just putting it all back together in fact so I'm wondering what all you looked at on yours and what you found...

 

the make a freeze plug install kit. i have a snap-on kit. are u sure it was a install failure. sounds like the head is lifting

 

I still have the rubber plugs from last year and never had an issue again.(been boosting 40psi @ the track) I've used air rachet to tighten it though. although I've switched to HKS HG and L19's couple weeks ago.(and few other go fast goodies)

 

I had the same issue with mine when I got it back from the machine shop.. Everytime I built boost, one of the front freeze plugs would blow out and id lose all my coolant. I finally just threw in a couple rubber plugs like the ones above and never had another issue. A lot of people heckled me for it but it ****in worked. Ran it on 30psi as well.