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Thread: 07 Engine Rebuid Time! Reply to Thread
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  Topic Review (Newest First)
04-24-2019 09:17 PM
shandalo There are several performance differences between the 04-05 and 06-08 for sure, but a significant number of them are in the intake and exhaust systems.
I have found documentation of the later engine having 1mm oversize intake valves, slightly improved cam profiles, slightly different dishing on the (same compression) pistons to accommodate said valves, and slightly thicker rods. Some also say the crankshaft was slightly altered, but I've found no proof of such. I have found no documentation (in English at least) of the innards of the K24A, how they differ from the A2, or if there were any revisions throughout the years. Keep in mind these engines we're all built in Japan. Were they upgrading just a small portion of them with new innards to ship stateside and making the rest with the older spec parts? I'd venture not.

Outside the longblock of the 06-08, intake piping, throttle body and plenum are larger. As is the exhaust piping, along with a better flowing cat.

With that said, I have an 04 with all of the 06-08 intake and exhaust parts. The difference is noticable. Once I swapped out my tired K24A2 for a JDM K24A, the difference was much more pronounced. My opinion is, especially for a car being brought to renewed OEM, the difference between the longblocks, and their power output, would be negligible.

Of course, this is my opinion, and if anyone can point me to proof that I am incorrect, I will gladly read such proof and if necessary amend my statements to reflect what is factual.
04-23-2019 12:36 AM
circuitsports The engines you see listed the k24a is rated at 200ps or 196hp on 101 RON or 96 ocatane ish - you will see 190 ish compared to roughly 220 on your engine stock.

heres a couple options for replacement

https://www.kmodperformance.com/coll...24a2-longblock

https://www.kmodperformance.com/coll...ck-low-mileage
04-22-2019 07:15 PM
Killerpanda Thanks for the inquiry. I have a couple of reasons.
#1 and most importantly when i was 16, a car wash ripped off my exhause and i thought it was cool to drive around like that. The day before i got it replaced by them, i burnt a few valves and lost comp on 2 & 3.
#2 The car was origianlly my fathers and was his fav car he ever had and ive been restoring it to factory ( new paint, rebuilt 6spd and motor, all new bushings and susp components) and was hoping to give it to him as a retirement gift.
#3 i grew up in that car and was never able to experience it brand new.


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04-22-2019 06:57 PM
TSXXXX Question though, why do you want to rebuild your motor? Does it drink oil? Have you run a comp test? If it's not down a cylinder and not chugging oil I don't see the reason for any of this.
04-22-2019 06:55 PM
TSXXXX A quick search should be helpful when trying to see the specs on a JDM motor to see if its the TSX equivalent.

Look on the facebook TSX groups for people parting out their runners. Good luck finding one with that low of mileage though. K motors go forever, I'd be fine grabbing one with 150k+ miles as long as it was never ran excessively low on oil.
04-22-2019 05:03 PM
Killerpanda
Quote:
Originally Posted by TSXXXX View Post
If you're going to do a stock rebuild save your money and just find another k24a2 - ideally from a 06-08.



Even with your dealer discount you're going to be spending WAY more than what it'd cost to buy a used longblock. k24a2's are going for $500-$850 all day.



If you want to plan for boost and are going to build a stock-ish motor I'd look into ARP head studs, a new timing chain/tensioner, a 45* VTC, and a type-s oil pump as a minimum. K motors are quite sturdy and can take a decent amount of boost. You can make 400-450whp all day on a stock motor and it'll still be very reliable/driveable.
Thanks for the info!! I tried the replacement route but found too much variability. Seems sellers are trying to reach as many people as possible by listing thier motors as "k24a2 05-08 TSX, oddessy and accord direct drop in" and anyone who onows anything knows that those motors are not the same in one way or another. I did end up settling on and engine and bought it but when i checked the serial number at work it wasnt a TSX motor. If you could poimt me in the way of a USDM (kinda done w the whole "JDM" scam atm) sub 70k 2007-08 motor for a tsx that would be imensly helpfull! Budget is around 1200 with ideal @ 850 like you said. The low miles is really important to me as the car will eventually be a gift to someone and i wouldnt want them to have something of questionable reliability. Thank you again for all the info and any help is still apreciated!

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04-22-2019 04:52 PM
TSXXXX If you're going to do a stock rebuild save your money and just find another k24a2 - ideally from a 06-08.

Even with your dealer discount you're going to be spending WAY more than what it'd cost to buy a used longblock. k24a2's are going for $500-$850 all day.

If you want to plan for boost and are going to build a stock-ish motor I'd look into ARP head studs, a new timing chain/tensioner, a 45* VTC, and a type-s oil pump as a minimum. K motors are quite sturdy and can take a decent amount of boost. You can make 400-450whp all day on a stock motor and it'll still be very reliable/driveable.
04-22-2019 04:12 PM
Killerpanda
07 Engine Rebuid Time!

Ive got an 07 tsx with 220k on the original motor. I want to rebuild it, but i have no idea where to start and what i need to buy. I cant seem to find a comprehensive rebuild kit anywher eon the web (oil pump, timing kit, pistons, rings, bearings, the works) it needs the head totally rebuilt (leaky and burnt exhast valves) and i assume the block as well. Id like to keep it as stock as possible but am looking at a turbo or nitrous in down the road, is that duality possible or would i have to build it to handle that?
Anyone who could point me in the direction of that kind of kit or write out a list of parts for me and that i can check off from ( so as not to forget something and have to wait on an order)
I work at a dealership so i have a fairly sizable discount on parts that may need to be OEM.
Thanks for your time in advance.

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