Removal of water manifold on AAN head

[K7ERG]

Is it just the 4 securing bolts that hold it on or is there something i am missing. As i have them out and it is stiff........ Need it off to get the inlet manifold off so i can get studs and head skimmed........

Any info would be great

Craig

[mcandmar]

Yes there is a small rubber o-ring around each port that can bond to the head, i had to get a bit physical with mine to seperate it.

[K7ERG]

thanks for the reply mate

will do

Craig

[K7ERG]

Missed 2 bolts got it off. Damaged the middle seal.

Checked the head and where the spark plugs are there are hair line crack from the on 4 of the 5 cylinders Gutted!!!!

I have a NA 20v head are they the same or different?


Craig

[mcandmar]

I know your pain, to be honest they are ALL like that. If its only between the spark plug and valve seat it should be ok. If it runs down the plug threads or into the exhaust port i wouldnt risk using it. Thats the problem i had with my head, crack started at the plug threads and went down the exhaust port for about an inch.

NA heads require a little machine work for S2 applications, for a start it dosent have the water manifold, NA heads only have the one water outlet so you have to get the other ports and bolt holes machined. For ABY/ADU motors you also need to machine the mount for the cam sensor.

I'm currently talking to Corey about said mods, might be worth giving him a call.

Mark.

[K7ERG]

the cracks are very small. but i am planning round 450bhp so it looks like i will be looking or a AAN head.........

[mcandmar]

Happy hunting my friend, took me a year to find a half decent one

If its only small ones around the spark plugs i wouldnt worry about it as from what i've seen the only heads that dont crack are the 7A ones. Having said that i would bet anything they will crack too after a few months on a turbo engine.

Jon441cc offered me an ABY head a month or so back, might be worth checking incase he still has it. --> http://www.s2forum.com/forum/showthread.php?t=22509

[K7ERG]

cheers mate will have a look