Drifto

iTrader: (6)

Had to replace the water pump so I decided to mod the new one to insure that the freeze plug wouldn't come out. I've never had this happen but there is local guy who has had this happen twice not to mention all the post on here about it.
Anyway it's very simple to do.
1) Drill (2) 1/8" holes, from the inside out, alongside the freeze plug and through the "ears" of the pump housing.
2) Install 1/8" rivet with 1/4" grip
3) Feel relief that this will not happen to you

mega-z

iTrader: (13)

Hells yea blowing out antifreeze everywhere is not cool

heel2toe

iTrader: (41)

I dont understand the point to this. Freeze plugs are there for a reason. Would you rather have that blow out or have your block crack? Just my .02

blkmkIII

iTrader: (34)

x2

EvoRob22

So how do you propose to solve the problem? Great Idea IMO.

TTP Engineering

iTrader: (465)

I don't commonly see that one pop out on the Evo. More commonly is the weep hole. The block also has seven additional freeze plugs so unless you do them all, you are wasting your time.

JohnDoe1984

iTrader: (1)

My guess is that if that area actually froze and needed that plug out the pressure from the ice would swing open that plug anyway pivoting on the rivets. It probably just keeps it from coming out easily.

heel2toe

iTrader: (41)

I dont actually have a solution besides just leaving it alone. I have heard of people using threadlocker around the perimeter of the plug to help them stay in. In my situation when the plug popped in my waterpump it also created a leak in the weep hole. So out came the old and a new one was thrown. The plug was already installed in the waterpump from the factory.

William254

iTrader: (6)

on a friends car just this last weekend the same freeze plug popped out at the track and sprayed on his own tires(mickey thomsons) and resulted in him hitting the wall all the way across the other lane at a buck thirty. scary thought....

but not the smartest mod IMO

tsi20gawd

iTrader: (16)

Most of the time this issue is linked with a headgasket sealing issue, over pressureizing the cooling system and the freeze plug is pushed out of the waterpump.

Bryan

heel2toe

iTrader: (41)

^
Having experienced this same exact thing I have to agree. The plug popping out has to be a sign of too much pressure in the system for whatever reason.

ROGERV

iTrader: (51)

Was this the silver Evo @ firebird raceway in AZ ?? Saw the video on youtube.

Gary@MellonRacing

iTrader: (74)

u guys can pm the link please ??

Drifto

iTrader: (6)

There is a TSB for this problem on the 05' so Mitsubishi had it happen enough that they thought is was worthy of a notice to their technicians. The cause of the occurance is purely speculation at this point. Some believe that cylinder pressure gets into the cooling system and others believe it is purely a function of the pump making enough presure to remove the plug. Their have been several here that had theirs pop out and installed a new one with red loctite or JBweld and never had the issue again. What ever the case may be I feel better with it locked in.
In regards to ice in the block, USE correct antifreeze ratio for your climate and this will never be a problem.

ROGERV

iTrader: (51)

http://www.youtube.com/watch?v=kKovN...layer_embedded



Yeah had mine popped a while back on my 05 evo. The dealer replaced the water pump and it has never happened again.