Head gasket EJ25 DOHC on an EJ22T

[not8player]

I am putting EJ25 DOHC heads on an EJ22T block. So far I am planning to use the stock EJ22T head gasket it seems to be a better fit.

I am tempted to take a dremel tool and slightly chamfer the lower water coolant passages on the DOHC head, to improve the water passage way.
Has any one done that?
Anyone that think is an over kill, a compromise on the rigidity of the head, a waste of time, etc...
I am just looking for opinions and inside, from others that have gone this path.
From what I have gathered no one has complained about overheating problems or head warping issues do to insufficient coolant.

Thank you for you input

[Matt Monson]

It's a waste of time. All this talk about coolant passage problems is mental masturbation. I personally know about a dozen different people that have used both SOHC and DOHC Ej25 heads with the Ej22T. They have used both Ej22 and Ej25 head gaskets, and there's never been an issue with either of them. Just use the stock gaskets and call it done...

[Splinter]

The head gasket problem is due to the block, not the heads.

The block flexes slightly and wears away at the heads

[Matt Monson]

The head gasket problem is due to the block, not the heads.

The block flexes slightly and wears away at the heads

I think you are confused and talking about the Ej25 block. There is a lot of debate on this site about the lining up of the coolant passages between Ej25 heads and the head gasket and the Ej22T block itself and the potential for issues as a result. I am saying that it's a non-issue and cpncerns were largelyspurred by Larry Witherspoon's article that is on the main Legacy Central site. The thing is he never built the engine and tested his theories of problems. It was purely speculation on his part, but has become one of those internet urban myths that gets a lot of discussion...

[not8player]

It's a waste of time. All this talk about coolant passage problems is mental masturbation...

Sold, I like how you put it



But you have to understand where the concern comes from. When you line up the two head gaskets and see what % of the bottom coolant passage does not line up, it makes you wonder. If I have to estimate I would say 25%-30% of the bottom passages get block off by the mismatch

[Matt Monson]

I do understand the concern and have lined them up myself. If it weren't for my exposure to the guys here in Colorado who essentially came up with the Ej22T hybrid formula I would be wary as well. But I have seen what these cars have been put through and how well they have worked out and trust the "formula". I trust it so much that I am doing one myself. Of course, people are more than welcome to disagree with me, and if they don't feel safe with the set up do what they think is right to make it more "safe". I can only share what I have seen...