B20A Flywheel, the truth is out there!

[L3G10N]

i have the f2k5 and carotman have the b2k5. Maybe we can find a day to compage the bell housings.

[Versanick]

Is the f2k5 the 86-87 (85-87?) JDM b20a gold top cable tranny? and the b2k5 the 88-89 black top b20a tranny?

I'm confused on how this works. I have a gold top and it has a cable tranny, but I can't find any numbers to identify.

Does Gregg86DX have the f2k5 or b2k5?

I have to find a clutch/fly as well, and while I was buying a clutch for the b20a5, I figured that a matching flywheel wouldn't be a problem.

hmm.

[RobT5580]

Yeah you have the codes for the right years and both are cable trannies just different part numbers.

About a month ago me and Carotman discussed the flywheel and we know for sure the 90-91 B20A5 is bigger so i assumed to go with the 88-89 parts. So using the 88-89 stuff will be the closest to the stock B20A stuff as you will get. It seems gregs case was very minor and if you get a lightened flywheel (depending on which one) it will bring the pp closer so you wont have to grind the housing at all. This is just an assumption by me but most flywheels i have seen have a shaved thinner as well.

[L3G10N]

the f2k5 came from the accord 86-89 jdm and carotman'S b2k5 came from the prelude 85-87 jdm

[Gregg86DX]

Just to summarize my situation:

- I have a B2K5 transmission, I was told it came from an '87 Accord. (this transmission did NOT come with my motor)
- I am using a stock flywheel from an '88 Prelude SI.
- I am using an Exedy (stock replacement) pressure plate and clutch also from an '88 Prelude SI.
- I ground the area marked in blue in the above picture down about 1mm and there is no more rubbing.
- I am using a starter from an A20 Accord with automatic transmission.

I actually hooked up a starter tonight and cranked the motor over to check the compression. It worked fine. Here are some pics:

That's my starter button rig.

Compression results: 190-182-186-190 (on a cold, dry motor. Not too shabby)


Traditionally enemies in the wild, the Ford and Honda have learned to accept
each other and even help each other out, in times of need. :)

Gregg

[carotman]

I'll check for the PP clearance with a stock one... I'll also get the flywheel grinded about 1mm jut to help things :)

[skiingco]

Gregg,

How did you get pics in your post? I just put my B20A in my 86 Lude and I wanted to show Rob, but I can't figure out how to get the pics inserted
Chris

[Gregg86DX]

Gregg,

How did you get pics in your post? I just put my B20A in my 86 Lude and I wanted to show Rob, but I can't figure out how to get the pics inserted
Chris

You need to have some place to host them. If you have web space available at your ISP. you can move the pictures up there and link them into your posts. If you need a place to host them, you can send them to me and I'll post them for you, just let me know.

Gregg

[ICEMAN707]

so greg, been 4 months now. you got that flywheel working and does it work perfectly fine? if so, that's another part taken cared of. now how about the timing belt? can you use b18+ or b20b/z timing belt maybe?

[RobT5580]

Pretty much everything has been taken care of parts wise. For timing belt you can use the prelude B20A5 belt if you use the lower sprocket and waterpump. The flywheel is the same as the 88-89 prelude NOT the 90-91. And getting parts from Japan is just as easy as ordering them from the US so thats not a problem if you want to keep the JDM stuff.

[ICEMAN707]

Thanks Rob. Can you PM me or post all the parts we need for the JDM B20A so I can print it out?

[Vinny]

Thanks Rob. Can you PM me or post all the parts we need for the JDM B20A so I can print it out?

Theres already several lists of parts between the information in Engine swaps and in the FAQ sections

USDM parts that will fit the JDM 3g Accord/ 2g Prelude B20A

What's the B20A? (JDM DOHC Accord engine 2.0L EFI )

A few B20A Part prices

Project B20A

[Gregg86DX]

Another thread that Rob posted has a great list of B20A part numbers:

Anyone bought any B20A parts lately?

My motor is not installed yet, but my test fitting of the transmission has gone well. There was one other place that required slight grinding, but it was pretty minor.

Regarding the timing belt, I purchased the correct OEM B20A belt from Japan. The price was very reasonable (<$30).

My install is getting very close, I am tentetively planning to do the swap in two weeks. My transmission is reassembled and ready to go and I have gathered almost all the parts I need. The major stuff I still have left includes:

- Install timing belt
- Drill and tap second O2 sensor hole in exhaust manifold
- Build exhaust pipe section to extend downpipe to cat.
- Fabricate bracket to mount A20 A/C compressor
- Figure out how the hell to wire my Prelude ECU and ignition
- Fabricate dust shield for manual transmission bellhousing (mine came with an automatic.)

I have almost all the parts I need, so barring any major problems, I should have this thing running in a few weeks.

Gregg

[adams86lxi]

damn, i wish i remembered what flywheel and what clutch and what was needed to be done for it to all fit in my 5speed b20a but the guy that had it before me did all of it to get it to work before he sold it to me. I do believe it was the b20a5 88-89 style flywheel he used with the b20a5 88-89 clutch and had to grind the bell housing down a little.

btw: gregg86dx what site did you order the oem jdm b20a timming belt from and can you order other parts for the b20a their? And also im going to need a new clutch some what in the near future and i was wondering wheir you got the Exedy for an 88 prelude SI clutch and for how much it was. Ive heard good things about them for being a stock clutch! THANKS!

[ICEMAN707]

Thanks guys for answering my questions! This should be a sticky now that it has the most complete info for the JDM B20A with links to other posts all in this post. If anyone else has more helpful info, please feel free to add them here that way everything is right here.

[Gregg86DX]

damn, i wish i remembered what flywheel and what clutch and what was needed to be done for it to all fit in my 5speed b20a but the guy that had it before me did all of it to get it to work before he sold it to me. I do believe it was the b20a5 88-89 style flywheel he used with the b20a5 88-89 clutch and had to grind the bell housing down a little.

btw: gregg86dx what site did you order the oem jdm b20a timming belt from and can you order other parts for the b20a their? And also im going to need a new clutch some what in the near future and i was wondering wheir you got the Exedy for an 88 prelude SI clutch and for how much it was. Ive heard good things about them for being a stock clutch! THANKS!

These are the folks I ordered from; [email protected] They don't speak english real well and they quote prices in Yen, so you need to keep your request simple and use Honda part numbers, but I think they can get most any OEM part you need. The costs are reasonable and they ship quickly.

I got my Exedy clutch from these guys:

http://clutchcityonline.com/Merchant...ct_Code=08-013

Gregg

[adams86lxi]

alright cool thanks gregg!

[skiingco]

I have a juicy one. I bought the flywheel, clutch and starter for my B20A and then spent two days trying to find a 12mm x 1.00 Die to make my own Flywheel Bolts being that Parts stores, hardware stores and even machine shops in my area do not have a 12mm x 1.00 tap or bolt for me to confirm the crankshaft end threadcount where the flywheel bolts go. I am going through all this, because the scam artists at SpiTuning sold me the engine and trans without the bolts.

[Gregg86DX]

I have a juicy one. I bought the flywheel, clutch and starter for my B20A and then spent two days trying to find a 11mm x 1.25 Die to make my own Flywheel Bolts being that Parts stores, hardware stores and even machine shops in my area do not have a 11mm x 1.25 tap or bolt for me to confirm the crankshaft end threadcount where the flywheel bolts go. I am going through all this, because the scam artists at SpiTuning sold me the engine and trans without the bolts.

I got my flywheel bolts from the junkyard off the same 88 Prelude SI that my flywheel came from. Have you tried the Prelude bolts yet?

[RobT5580]

Yeah SpiTuning is not the best place to shop he beat me for a flywheel and the tranny he sold me is beat and has a problem with reverse and fifth. Fortunatly i never installed that tranny as its for parts but i was still mad.

[skiingco]

No, I didn't actually. None of the salvage yards in my area have a 88 Prelude in their yard. So, I guess I have no choice but to go to the pirate dealership.

[skiingco]

The verdict is in, Gregg was right, 88 Prelude Si(B20A5) Flywheel bolts fit the my Gold Valve Covered B20A and the measurements are, 12mm x 1.00 x 30mm, which is still a non-standard bolt. $35 from the dealership for 8 of them. One of the senior mechanics there with the largest tool chest told me the thread count. The head is a 17mm, 12pt, 3/8 drive socket bought for $3.64 from Sears(Craftsman)

[carotman]

Yup, I used the prelude bolts without problem.

[skiingco]

Carrot, Rob, Gregg. The 88 Prelude Si Flywheel, Clutch Plate and Pressure Plate look like they fit, but the release bearing that came with them definitely does not. I have digital pictures I would like to send to get your opinion. Please email me at [email protected] with an address I can show pictures to you, unless you know if the release bearing is supposed to come from a different year. Carot I noticed you posted Throw out Bearing ------- B18A1 ---- (Acura Integra 90-93 non vtec) on another thread, did you find that out by actually having to order it for the B2K5 you have and if so, what do I identify the car by at the parts store, "90 Acura Integra, FI, 5 sp Manual?
Chris

[RobT5580]

We already know what works and what dont at this point. Use the 88-89 B20A5 clutch and the 90-93 non vtec integra t/o bearing. I have new JDM B20A bearings but the integra one is exacly the same as YK86 did some research on this a long time ago.