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Discussion Starter · #1 ·
I wanna do a frank build and I found a k24 block that's out of a stock tsx for $450 and a k20a2 head from a RSX for $125, $500 for both. Block is fine but the head has a dropped valve. Guy said the head needs some work for $300-400 he estimates. Does this sound like a good idea?

I've been reading up on frank builds and I've seen a thread on k20a.org
http://www.k20a.org/forum/showthread.php?t=13433
Says the k24a2 head has more potential with a porting. I don't plan on fully building the motor but I'd like to know what would have more potential if the bottom end was fully built in the future and made to rev higher. A ported k20a2 head or ported k24a2 head? Reason I ask is cause my neighbor has a k20a valve train and I could find a k24a2 head or get the k20a2 head from this guy and get it fixed.
 

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it might be worth it to go with the K20 head. from people with a lot more experience on head porting than I have, they don't agree that the k24a2 head is better overall.
 

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Discussion Starter · #3 ·
Guess I'll go k20 head. I got pics of the head, he said the valve ring was gone and a good machinist could fix all of it...



What does everyone think? $500 with the head or $400 for just the block. The block seemed fine and was just missing a timing chain cover.
 

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dont mess with shit that's been fucked up. taking on another person's headache can be a nightmare. pass it up and get a better used head or a new one
 
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Hard to tell from pics but I agree with these guys ^^^. It almost looks as though the valve seat has cracked through to the spark plug hole. In any event, it will require quite a bit of welding and machine work to bring back into spec. As common as K20 heads are on the used market, I might just strip this one for parts and call it a day. Good luck.
 

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Had the same thing happen to me, dropped a valve which broke and then impaled itself in the head. Ended up sending it to PortFlow in Cali and having it repaired + port and polish. They restored it good as new!

 

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i have a bare k20a2 head I'll sell ya for 150 in way way better shape than that... located in north nj. had it as a spare. add whatever valves, valvesprings, etc you want.

all it needs is the seats freshened

lmk
 

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Discussion Starter · #14 ·
Had the same thing happen to me, dropped a valve which broke and then impaled itself in the head. Ended up sending it to PortFlow in Cali and having it repaired + port and polish. They restored it good as new!

Forgot to ask how much that cost you

And I just txted my friend saying "Dude offering me head for 150 with no damage"
LOL just gave me the laugh of the night.
 

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random question: does a k20z1/a2/z3 use the same spark plug as k24a2 head, or does k24a2 head require different spark plugs??
 
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They're all the same for K-motors, just choose your heat range.

Why did you bump a 3-year old thread to ask this question?
 

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only k24 head thread i could find lol
 
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