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Clutch Difference for k20a2 vs k24a2

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57K views 23 replies 14 participants last post by  snorky  
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#1 ·
I'm in the process of shopping for a clutch for my Acura TSX and I have noticed that ACT does not list Xtreme Pressure Plates for the TSX but does for the RSX. Does anyone know what the difference is between the 2 engines in regards to clutches?

Is it a case that I would have to use the Type-S RSX flywheel to use an RSX clutch? I'm boosting my TSX and don't want a twin disk as it is my daily.

Note: I am using the TSX trans so I don't know if that makes a difference... I honestly thought the clutches were the same but it looks like I am incorrect.
 
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#8 ·
theres 3 different set up s

k20a2/k20z1/k20z3
which are the most popular

k20a3 has a off set dowel pin on the flywheel so a2 stuff will not fit

k24a2 has an inverted flywheel

at the end of the day just get a k20a2 set up
 
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#11 ·
they are interchangeable but i notice the tsx disk has more of a contact patch over the type s disk. fly wheel on the tsx is heavier over the type s. the pressure plate is a little bigger.. may be for the t/q of the 2.4L ... this is all oem parts i was looking @...
 
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#14 ·
k20 and k24 have the same bolt pattern on the crank for the fly wheel
so all flywheels interchange
the bolt patterns/dowel pin locations on the three different flywheels where the clutch pressure plate mounts are all at a different clocking
the flywheels are all different weights
i figured this out the hard way when i installed a new clutch in my ep3 with k24 swap.
the car had a stock k24 flywheel and clutch and i ordered a stage 2 ep3 clutch
you can imagine my anger after two hrs of work taking the tranny out only to find out i was going to be without a car the next four days.
my fix was ordering a aluminum flywheel from spec (8lbish)
it has the bolt patterns and dowel pin placements for both the ep3 and type S
clutch pressure plates.
the reduced weight from it has made the car much easier to down shift with less rev match needed in traffic.
not to mention the ease of holding a 8 lb flywheel in place while installing over the 20ish lb tsx. also using the extra bolt holes i put a bolt into the back of the flywheel to keep it from turning while torquing the flywheel bolts to 75 flb was very convienent. :D
another tip i have when installing a clutch is wash the clutch pressure plate and flywheel surface with palmolive and a scotch brite pad to remove the anti rusting agents and oils manufactures apply and machining lathe lube off so it will not contaminate the new clutch disk. that crap will ruin clutches and make for chatter. if the surfaces are not flash rusting when im done i wash it again lol same rules apply for new break drums and rotors! manufactures apply anti rust coatings on products so they look pretty for the consumer and if not removed will cause all kinds of premature failure, noises,vibrations and chatters.
 
#16 · (Edited)
Clutch Difference for k20a vs k24a2/a3

i happened to install my competition clutch stage 2 on my k24a3(same as tsx k24a2) and i had a k20a Dc5 clutch also.interesting thing that there is size and bolt pattern diferences
Clutch disk is much smaller of k20. TSx on left,k20 on right
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Pressure plate of tsx is much bigger and has more contact area.
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k20A clucth disk on TSX flywheel
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tsx disk on tsx flyhwheel
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Interesting thing that although you can put k20 disk on tsx flywheel but disk doest touch the flywheel and the springs inside are bigger and they touch with the bolts of flywheel.
tsx left,k20a right
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Here is pic of all,on left is competition clucth newest stage 2, 8090 st2100 clutch and flywheel.it is exactly same size of tsx and prssure plate bolt patterns match with tsx flywheel.
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So in nutshell, use same flywheel and pressure plate.and the clutch disk as well.
 
#17 ·
Rather than start a new thread, I'm looking at clutches for my K24A3/AST5 setup. I see a variety of kits offered - Exedy, FX, etc. Wondering what brands are reliable. I'm not going much over stock HP, so a standard clutch will be all I need. I want a driveable DD setup -I've had SPEC modified clutches & have no desire for that type of modifed driving techniques on this.

I see that TSX/K24 has differing surface area, etc., so want to be sure that I get a setup that matches, not one that "fits" simply becuase the setup bolts to the crank :D

Any suggestions?
 
#18 ·
the weight of the car should dictate what clutch you use because of the spring rate (strength) each one offers is different. the rsx weighs less than a accord etc and if you use too light of a spring or heavy you end up with the bounce surge at very slow speeds and less cushion on a clutch drop. i would use the clutch for the vehicle that has the closest weight to yours and go with a regular exedy not a stage 1 or cheap xtd etc. all the k series clutches fit the input shafts of all the different trans BUT they must match the flywheel/pressure plate or they will not mount up because of the dowel pin locations.
 
#19 ·
all the k series clutches fit the input shafts of all the different trans BUT they must match the flywheel/pressure plate or they will not mount up because of the dowel pin locations.[/QUOTE said:
@HusseinHolland: What he said summerizes it. So its better if you order the kit with flywheel,that way you will sure the pair will match. and as you have AST5 transmission, you should order the clutches made for Acura TSX (k24a2) or Accord Type S(Japan) k24a3. Both seing same engines. Choose the year as 2006-2008 and you should be good to go.
Click to expand...
 
#20 ·
Thank you for the responses.

My Bertone only weighs 900Kg. I'll look for an Exedy Clutch kit for an 06-08 Accord.

The old gear only had 60K miles, and the disc has decent life yet, but the PP & flywheel do have hot spotting.

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There is a coat is oil/grease all over the inside of the bell housing and the back of the motor. I'll have to change the rear main & trans input shaft seal for good measure. Do you guys replace the flywheel & PP bolts as a matter of course, or reuse?

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#21 ·
There is a coat is oil/grease all over the inside of the bell housing and the back of the motor. I'll have to change the rear main & trans input shaft seal for good measure. Do you guys replace the flywheel & PP bolts as a matter of course said:
if yours is not an agressive engine build,stock bolts should be fine.do use red lock tight on flywheel bolts.
regarring the dirt and greese inside bell housing,as yours is a k24.the k24's use a protective plate between engine and tranny.that protects dirt etc from going in the bell housing.here is link to that.if your engine doest have it,order it.its just 15$
https://www.kseriesparts.com/HON-21351-PNA-000.html
Click to expand...
 
#22 · (Edited)
Thank you. I'll just clean & reuse the bolts - I did look them up & the price per bolt, even discounted is $6-8 each (!)

I usually use a loctite thread locker of the paste variety on crank/flywheel bolts, to prevent oil passing the threads & contaminating the clutch - the Honda bolt holes don't go all the way through?

The cradle/protective plate is present, that is also coated with oil/grease :D I'll just do the rear main and input seal to be safe.

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