Don't know. I will find out in a couple of days however, if '04 MDX pistons are different from '04 Odyssey

This will be very interesting.. Will you be taking measurements? or just test fitting? I sense an upgrade in your future.. near future that is..

 

This will be very interesting.. Will you be taking measurements? or just test fitting? I sense an upgrade in your future.. near future that is..

Not needed. Odyssey valve pockets = MDX. Same pistons.

:gotme: on second question

 

Here are the swap options along with brief advantage(s)/disadvantage(s):

BLOCK/HEADS (incl. manifold (upper/lower), tb)
------------------
J30A1/J30A1
advantage: no modification needed.
disadvantage: no torque until turbo/sc kicks in.

J30A1/J32A2
advantage: mid-range and top-end power
disadvantage: J30A1 pistons have to be modified to fit large J32A2 (intake) valves.
Not much torque until turbo/sc kicks in.

J32A2/J32A2
advantage: no modification needed, mid-range, top-end power.
disadvantage: torque is still ok but better than J30A1

J35A4/J30A1 (Odyssey '02-04/ '00-02 Accord V6)
advantage: no modifications needed, adequate torque, adequate mid-range
disadvantage:needed better cams, large intake valves for overal better powerband, top-end power

Option 1:
If budget is limited the solution is to swap J32A2 (CL-S/TL-S) cams into stock J30A1(Accord V6) cyl. heads (see sticky CL-S swap and Cam machining).

Option 2:
Get J32A2 (CL-S/TL-S) complete cyl. heads + IM (intake manifold)
But requires different pistons (see J35/J32 below) to clear J32A2 valves.

J35A3/J35A3 (Acura MDX '01-02), J35A4/J35A4 (Honda Odyssey '02-04)
advantage: no modifications needed, great torque, nice mid-range
disadvantage: little less air flow than J32A2 but very close.

This option looks like a good choice if getting the complete engine or even separate short block and cyl. heads/manifold due to a price. And MDX the cyl. heads are the same part # as CL-S, however intake valves and cams are different than CL-S but overall much better than pathetic AV6.

J35A1/J32A2 (Odyssey '01/CL-S '01-03)
advantage: great entire powerband and especially torque.
disadvantage: Need CL-S or RL pistons.

Note: Same options apply as listed below.

J35A3/J32A2 ('01-02 MDX/CL-S '01-03) or J35A4/J32A2 (Odyssey '02-04/CL-S '01-03)
advantage: great entire powerband and especially torque.
disadvantage: Need CL-S or RL pistons.

There are also couple options:

Option 1
With '01-02 complete MDX block or '02-04 Odyssey complete block (crank/rods/pistons) it is required to purchase 2005 Acura RL pistons (new set $50 each) This is a best option still since these pistons have clearance for large 36mm J32A2 (intake) valves thus no modification needed. Despite the fact they have higher 11.0:1 CR still even supercharger can be used here with low boost up to 7psi intercooled (assuming safe AFR). In addition, if 11:1 CR is too high for you, you can use '03 CL-S pistons with 10.5:1 CR.

Option 2
'01-03 J32A2 block (CL-S)
Required to purchase the following:

-= hondaautomotiveparts.com =-
'02-'04 Odyssey (crankshaft)
Product No. 368270 or
Honda part #13310-PGK-A00

'02-'04 Odyssey (connecting rod)
Product No. 368269 or
Honda part #13210-PGK-A00

Main bearings + rod bearings

-= acuraautomotiveparts.org =-
'03 CL-S (pistons) - 10.5:1 CR or
'05 RL (pistons) - 11.0:1 CR

pistons rings (per chosen model)

Note: Odyssey pistons do not have clearance to fit large 36mm J32A2 (intake) valves. Solution - custom job to increase valve pockets.

BTW, The only advantage to get J32A2 block is due to better cylinder sleeves to withstand heat designed for higher redline vehicle, otherwise depending on the price Odyssey or MDX block are the best bet.

Keep in mind, J35A5 '03-04 MDX will not fit on 6th gen. AV6/CL/TL/CL-S/TL-S due to different design, and looks like only for 7th gen. AV6.

Edit: The correct valve dimensions now stand as follows: incl. J30A4/J32A4

J30A1 '98-02 AV6: 34mm/29mm (intake/exhaust)
J30A4 '03+ AV6: 35mm/30mm

J32A1 '01-03' TL/CL: 34mm/30mm
J32A2 '01-03 TL-S/CL-S: 36mm/30mm
J32A4 '04+ TL: 35mm/30mm

J35A1 '99-01 Odyssey: 34mm/29mm
J35A4 '02-04 Odyssey: 35mm/30mm

 

All these engines listed above have the same mounting points? Same exhaust ports?
Trying to upgrade my sand car from a J30A1 and looking for the biggest motor that will accept all my custom parts made for the 3.0 sand car.
I need the motor mounts, trans (bell housing) pattern and exhaust pattern the same.
Also the intake height and length.
The 02-04 Odyssey motor the biggest?

I have been trying to give myself a crash course by reading but not coming up with the correct answers.
Thanks for any input!

 

Wow ! Man, thanks for sharing : :clap: :up2:
This is a great info for kids who looking for a swap

 

:iagree:
Excellent!!! Very useful info for all the true V6P AV6 performance gearheads working on their project cars. :wink:

Thanks again for sharing Serge! :clap: :up:

 

DAAYYYYYMMM! I'm going to jump for J35A4/J32A2 after graduation . Even NA is a great option.
Thanks 02AV6 :up:

 

A+ for serge...:up:

 

Got a ?

What does the letters/numbers AFTER the J30 or J32 or J35 mean?

ie:J30A1

 

My guess is that they are just revisions of the series. It starts A1 and goes upto A4, A1 being the first of that series.

 

i dont knw if this was stated before its kinda of a stupid ? but i was wondering would a cl-s intake manifold fit on to a j30a1 block?

 

so serge when u say the pistons have to be modified , wat do u mena exactly ? are u saying like grinded down ?


by the way this should be stickied

 

lol, thanks serge

 

Edited with confirmed info ^ regarding J35A4/J32A2 swap :up2:

 

I want, want MDX block and Type S parts in my car but prob gonna do with naturally aspirated . :up: :bowdown: :bowdown: :naughty: :banana: :shock2: :winkgrin: :devil2:

 

possible to get a j35 block with j32 upper engine to a 10cr or lower? That will really make me think twice about my setup.

 

For the J35/J30 combo; although it states the disadvantage is the top end power, I was wondering if you LOSE power in the high end as appose to having a stock J30 engine.

 

Also, does the MDX (03'-04') block have the special cylinder walls like the J32A2 that dissipates heat better.

 

J35A4/J32A2
advantage: great entire powerband and especially torque.
disadvantage:
With '03-04 Odyssey or '03-04 MDX block it is required to purchase 2005 Acura RL pistons (new set $50 each) This is a best option still since these pistons have clearance for large 36mm J32A2 (intake) valves thus no modification needed. Despite the fact they have higher 11.0:1 CR still even supercharger can be used here with low boost up to 7psi intercooled (assuming safe AFR).

So the 2005 RL pistons clear the j32A2 valves? Which rods should be used? Not to question you or anything.. but where are you getting your information from..? Just want to be certain, that's all..!

Looks like I will be stopping by Acura sometime this upcoming week...

 

Also, where do you get those pistons for 50 bucks a pop?

 

Got a ?

What does the letters/numbers AFTER the J30 or J32 or J35 mean?

ie:J30A1

J30A1
J = J-block V6
30 = 3.0 liters
A1 = What kind of heads it has

 

J30A1
J = J-block V6
30 = 3.0 liters
A1 = What kind of heads it has

well it is a revision number like planes. Just something major enough was modified for a number change. ie heads, which might be the only thing!

Just wondering did the 97 v6 run a j30 as well?

 

MDX cylinder walls are thicker and better resist cracking from high thermal/pressure loads. They are marginally worse at dissipating temperature vs. the spin cast design of the J32A2 but in no case this should hinder the performance for both NA or FI vihicles well, unless extreme heat (non-intercooled) generated under boost over 6-7psi.

So would that be the case for those that use 125 shot of nitrous like myself?

 

So the 2005 RL pistons clear the j32A2 valves? Which rods should be used? Not to question you or anything.. but where are you getting your information from..? Just want to be certain, that's all..!

Looks like I will be stopping by Acura sometime this upcoming week...

Yep, '05 RL pistons have 36mm valve pockets which are perfect fit for Type S large (intake) valves. I'm currently on vacation and will attach pics when come back (after 10th). As far as information I'm getting from friend of a friend who works at Acura part dept

This is what Acuranews says:

The forged crankshaft of the RL is similar to that of the MDX, but with revised counterweights to accommodate the weight of higher compression pistons. With their taller, reinforced crowns, these new pistons raise the compression ratio (relative to the MDX) from 10.0:1 to 11.0:1. The previous generation 3.5 RL had a compression ratio of 9.6:1. The elevated compression ratio is a key element in the horsepower gain compared to the previous generation engine. Part of the reason this elevated compression ratio is possible is an oil jet system that sprays cooling oil on the underside of the piston crowns to keep temperatures in check. New steel connecting rods are forged in one piece and then the crankshaft ends are broken , creating a lighter and stronger rod with a perfectly fitted bearing cap.

The best bet is to have '01 Odyssey block and swap in '05 RL pistons. Not sure about '01-02 MDX block this should be checked. '03-04 MDX crankshaft which is the same part as '05 RL will not work.
Bottom line, I checked crank, rods cannot be used from either '03-04 MDX or '05 RL on Odyssey block - they won't work. Only 'RL pistons/rings are good.

 

So would that be the case for those that use 125 shot of nitrous like myself?

If you tune it right (safe AFR) you should be fine

 

Does anyone know where to get the J35A4 short block? I can't find it at any junk yards. They are selling it as a whole engine