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K24Z1, are these engines that much different than the older CRV engines?

19K views 8 replies 3 participants last post by  ringgold  
#1 ·
I have been a little out of the K series loop since selling my old car and just sort of dove back into it with a K24Z1.

I have a friend that acquired a K24Z1 that had been hydrolocked, but still ran before being removed from the vehicle. I got the engine apart to find the #4 rod bent. Other than that, everything practically looked brand new, the engine is pretty dang clean. Apparently, this happened with the engine earlier in it's life, so therefore the engine is a lower mileage piece. The story we were told is that the hydrolocking happened, the vehicle was taken into the dealership where they changed the oil 6 times to get the water out of the engine. The engine still ran, but not as it should and so the customer brought it back. Thats when the engine was replaced....blah blah blah....

pic of said bent rod:
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So here are my questions. I knew from reading on here before that some people liked the CRV cylinder heads. They were reported to flow pretty well. Can the same be said for K24Z1 cylinder head? I do not have the head sitting in front of me, but I think it is a RAA casting and the CRV heads that people liked were PPA castings. Even though they are different casting codes how much different are the ports and what not?

Also, if we do the K20 cam swap and put in the vtec cams is there anything different we should do? Are the rockers different in this engine or whats the deal in that area? I have been doing some searching and reading around and it seems as if I have found some discrepancies amongst the information on swapping in the cams and rockers from another engine.

We plan on doing a turbo build on this K24Z1 and we also plan on keeping this head on there instead of swapping it.

If you want to share any info about the K24Z1 post it up. I know there was one thread started about them, but I guess two threads will not hurt.
 
#2 ·
to use a steel pan or any other pan you have to notch it a little on the side to clear the oil filter.
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The midshaft/ jackshaft that is required for a manual transmission is from a 04-07 accord or tsx MT.
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the oil pump has to be cut like an accord block.
Some have said the k20a2 starter does not work with the setup. I dont see a problem on my engine though. it will pop out and connect to the flywheel looking at it on the stand.
I am not familiar with the heads, I got mine just as a shortblock.
I was confused and thought I compared my spare crv pistons to the ones in the block. I later realized I needed new internals, going with 12.5 just a little bump in compression for daily driving.
I put my R trans up against it and look to bolt up like a normal k. I have a spare k24 block in the corner if it comes down to it as well though.
 
#3 ·
After reading a little more. I think that I can get another set of K24Z1 exhaust rockers and put them on the intake side and run some K20 cams. I think that is what some are doing with the older CRV heads with good results. That is what I am most concerned about right now. Also, if the head is that much different than the good CRV head, as in ports and flow, all that stuff.

Thank you for your information.
 
#4 ·
Screech,

I hope you are not running the engine in that picture the way it is photographed. The original oil pump out of that engine has oil passages that direct oil to the filter and back to the block and seeing as how you have replaced the original pump with an early model type s pump... you have no filtration.

Remove the cover from the old oil filter location and replace it with an actual oil filter. The original location for this engine needs to be plugged by either tapping the holes and using port plugs... or making a block-off plate.

The alternative is to simply keep the original pump in it.
 
#7 ·
Just in my initial search around for aftermarket pistons I notice that a lot of places offer pistons for a K24/K20 setup. The plan is to use the stock K24 head. Which pistons would be best to use with a K24 head that has the K20 cam setup? This would be for a turbo application. I am sure one of the sets I ran across would work fine, but I not sure which would be the best comp ratio.