Blown Freeze Plug

[Heatmiser]

My first question is - can the wrong radiator cap (MKIV Turbo) on a MKIII cause enough increased pressure to cause a freeze plug blow?

I have searched and have found some good info so far, I just blew the freeze plug right near the turbo - My car sat for about four years before I bought it and then completely rebuilt the motor ( I have upgraded the turbo, injectors, exhaust etc... - I have replaced just about everything else as well... including all the coolant hoses..

Since it's been cold and since I've been running the heater is it possible I could've blown some crap loose from the heater core and caused a clog somewhere?

Before the freeze plug blew - it was running good and temp was fine - I'm running about 15 psi on the turbo.

I will get the toyota freeze plug to be sure and double check the two small coolant hoses as well...

Any other ideas?

Thanks in advance...

 

[tlo86]

i will say no to the radiator cap... i wouldnt see why it would make a difference

 

[IwantMKIII]

probably was not a properly installed plug or you are blocked up somewhere in your system.

 

[Jason T]

i will say no to the radiator cap... i wouldnt see why it would make a difference

http://http://www.absoluteradiator.com/Radcap.htm

Increasing your cooling system pressure by installing a radiator cap that has a pressure rating higher than factory specs increases stress on the entire system. Although some race cars use high pressure caps, their cooling systems are built to handle these higher pressures



. We recommend that you only use a cap with the pressure rating that your car was designed for.

 

[starscream5000]

Since it was rebuilt right before you got it (so says you), I'd hazard a guess and say the new freeze plugs were standard sized and not metric like they were supposed to be, hence them blowing.