MitsuJoe

iTrader: (133)

Isn't there some 05's too that have a problem with the water pump too?

C6C6CH3vo

iTrader: (9)

Low compression on #3 probably wont cause the leak, but that leak likely caused the #3 to go down hill. Problem is mitsu has a way too broad window of compression differential for their Evo.

Also looks like leak occurs at higher cyl psi/temps and perhaps some of the escaped pressure found it's way into the wet side (via #3 HG area) and out the path of least resistance - where you see leaking.

You might diagnose this one with a leak down as follow-up to your compression test.

In this case mitsu ows you a head/gasket replace, I think this happened to someone else but it was a PITA for him

Nonetheless, hopefully rings or valves are good cuz overheating will make engine knock up a storm - I found this out with a jeep rental in Aruba.

laraul43

not to keep asking the same question but, I did a compresion test on my 03 evo and it read 130, 125, 70, 130 I know within 20% is ok but this is substansially more what is causing this?

RoadSpike

iTrader: (5)

Wow thats crazy low compression numbers did you just do like one spin? Make sure you've pulled all the plugs and connected the battery to a charger for more accurate results. And do you have cams?

Crank it for 3-4 pops in the gauge then stop.