385 replies to this topic

[rufusbob]

CSP, that’s the most excellent video yet

[CSPCRX]

I thought that it brought everything together well also.  Aaron does a great job of pulling the content together for them!

[rufusbob]

Ive been ordering parts for my K24A transplant. Wanting to get new service parts from Honda / Acura while theyre readily available. Referring to Brians list

CSP, a question about the cam chain guide B in Brians parts list: It shows 14540-RAA-A02 which was adopted in Honda K24s starting in 03. But RSXs and early TSXs are shown to use 14540-PRB-A01. 07-08 TSXs switched to the -RAA-A02. Both guides are still available as service parts today.

At first I thought it might relate to the 50 degree VTC, but the same guides used on other more pedestrian K24s. So that doesnt seem likely. Is there some interchangeability or compatibility reason? Were two different parts originally released in the Honda & Acura systems? Seems odd that <if> one guide is an improvement vs the other, that theyd both still be available.

Edited by rufusbob, 29 April 2023 - 10:11 PM.

[CSPCRX]

If you compare the two upper guides you will notice the later version had a wider polymer guide section.  I went with this later version to provide a bit more defense against the timing chain possibly lifting off of the timing gears and skipping a tooth.

 

I don’t think it will be an issue sine I am running stock cams and not reving beyond stock by too much, if at all.

[rufusbob]

Great info CSP. Thanks!

[greasemonkeyreborne 5x1g's]

Great videos and progress.  Would love to do a road trip to check it out!

[CSPCRX]

Just don’t come in June - September,  too hot!

[CSPCRX]

Weight has been a big concern for many over the years when it comes to swaps in these cars.  So I dug up some data for comparison sake on where there car was and is.

 

First weight is with the EW3 engine in SCCA Solo2 trim.  Meaning super light 13x9 wheels that weighed less than 9lbs each.  No Auto Power roll cage, you can actually see the weight increase in the rear of the car between the EW3 and B16 from it, no race harnesses and a few other small things.  That’s what caused the large weight change between EW3 and B16.  These weights are all without driver.

 

 86 CRX Si swap weights no Driver by Victor M, on Flickr

 

i do not have EW3 data with driver, so here is the data with my big butt in the car.  I do find it interesting how the drivers weight really impacts the rear more than the front, notice the front to rear distribution change between with and without driver.  Going to find a way to shave a few pounds off the front of the car and move them to the right rear corner and work on corner balancing the car

 

86 CRX Si swap weights with driver by Victor M, on Flickr

[CSPCRX]

Was having an odd cooling fan issue.  Relay was making a buzzing sound and fan was never cycling, would come on at 205 degrees and just stay on.  205 is where the ECU tells it to turn on.  It’s important to understand I am using a fan trigger from the thermo switch in the bottom of the radiator as well as from the ECU.  The idea is you rely on the thermo switch but have the ECU signal as a backup at a higher temp then the thermo switch.

 

We tapped into the factory wiring and added a relay.  Turns out it wasn’t wired correctly.  Now the fan turns on at 196 degrees from the thermo switch as it should.  Also buzzing isn’t happening any longer and the fan is now actually cycling.  Fan output is higher as well.

 

Just shaking the bugs out of things.  I knew I would find some once things were up and running.  

[rufusbob]

RDX thermostat so the outlet points down instead of up and a modified TSX water manifold.  The one on the JDM K24a has a provision the EGR and is much larger.  This one has the heater water port welded shut, since I do not use the heater.  Water temp sensor installed and the block bracket for the passenger side mount. .

Im continuing to collect parts, and have two water handling questions; re pump & thermostat.

A CR-V water pumps suggested for a K24 swap. Is the 07-09 CR-V 19200-RAA-A01 the right one?

CR-Vs began using the K series in 02, and used 2 different water pumps between 02 and 09. The 02-06 CR-V uses water pump 19200-PNA-003, gasket 19222-PNA-003 and mated to 19410-PNC-000 manifold (none used by TSXs). The 07- 09 CR-V uses water pump 19200-RAA-A01, gasket 19222-RAA-A01 and manifold 19410-RAA-A00; all shared with TSX and other platforms.

If my reasonings sound, this opens the pool of water manifold and pump sources to USDM 04-08 TSXs, 03-11 Elements & 03-07 Accords too since they all share the same water manifold and pump with the 07-09 CR-V.

And wrt thermostats are both the Case (19320-RWC-A00) and Assy (19301-RTA-003) from a K series 07-12 RDX needed?

Edited by rufusbob, 28 May 2023 - 07:12 PM.

[rufusbob]

Yes alternator is from a modern EP3 Civic.  You must use a K series starter and alternator.

Similar question on suitable alternators: CSP, you mention an EP3 K series alternator; I.e. from an 02-05 Civic Si. But Brians parts list just says Civic K series alternator which would include at least up to 2011, and allow more possibilities. Do you know if it matters between 02-05 and 06-11? Thanks.

Edited by rufusbob, 28 May 2023 - 09:59 PM.

[rufusbob]

I don’t think I ever explained that.  Since i didn’t end up using the K tuned AC/PS delete and relocation kit I was able to use the one I had.

Without using the K Tuned AC/PS delete and relocation kit, were you able to used the stock tensioner, etc?

[CSPCRX]

My water pump and water pump housing came off of a 2005 CRV and bolted right up no issues at all. 

 

The RDX thermostat housing comes from a 07-12 K23 Acura RDX.

 

The alternator can be from any any K20 or K24a or a2.  Just make sure it works with the water pump housing you get.  It was more of an issue when we were trying to use the AC/PS delete and alternator relocation kit and it had to work with the pulley.  Since we didn’t use it it mattered less.

 

I am using a stock tensioner now with the K tuned idler pulley kit.

 

hope this helps answer your questions.

 

been putting some miles on the car to identify any issues before hitting the track.  Found some coolant leaks and had to tighten up some clamps.  Ripped around this morning for about 20-30 minutes without any leaks!  Was also watching IATs (Air Intake Temps) and noticed they were above ambient.  Confirms I need to build a block off and duct like I had on the B16.

[rufusbob]

My water pump and water pump housing came off of a 2005 CRV and bolted right up no issues at all. 
 
The RDX water pump housing comes from a 07-12 K23 Acura RDX.

The alternator can be from any any K20 or K24a or a2.  Just make sure it works with the water pump housing you get.  It was more of an issue when we were trying to use the AC/PS delete and alternator relocation kit and it had to work with the pulley.  Since we didnt use it it mattered less.
 
I am using a stock tensioner now with the K tuned idler pulley kit.
 
hope this helps answer your questions.
 
been putting some miles on the car to identify any issues before hitting the track.  Found some coolant leaks and had to tighten up some clamps.  Ripped around this morning for about 20-30 minutes without any leaks!  Was also watching IATs (Air Intake Temps) and noticed they were above ambient.  Confirms I need to build a block off and duct like I had on the B16.

Thanks CSP. Its beginning to make sense.

When you say quote The RDX water pump housing comes from a 07-12 K23 Acura RDX unquote, do you mean the thermostat instead of water pump?

And as for the water manifold, you used a TSX manifold per your 19 May 22 post no. 138, right?

Glad to hear youre really driving it! Its gotta be a blast.

BTW I hate coolant leaks. After giving up on one many years ago, took the car to a garage. They easily found a slow drip from the pump seal weep hole with a pressure tester. (So slow it would evaporate off the hot engine without leaving evidence). Then more recently used my tester and a stethoscope to track down all the (air) leaks in an old Corvette before refilling the system after an engine rebuild. Within the last year when even that failed on my old F150 I got an inexpensive dye & black light kit at my FLAPS. For the first time in my ownership its without coolant leaks! (The leak was at the connection of the 25-30 year old overflow hose to the radiator; a place never under pressure). :-)

Edited by rufusbob, 01 June 2023 - 01:14 PM.

[CSPCRX]

Correction made above RDX thermostat housing, fixed above  Sorry about that.

 

the “manifold” are you talking about the upper coolant manifold?

 

Coolant leaks are a pain.  My B16 was plagued with them and I always try and keep the cooling system as simple as possible for that very reason.