OK... my ex's H23A grenaded a last year, we ordered an H23A1 through the mechanic, who took a month to do everything, then gave the car back, and a hand full of cash saying "I saved you some money, here's an F22 from a JDM Prelude."

What could we do, we just wanted to be done with this scammer. So we sucked it up, and kept the motor.

It shredded a timing belt about three months ago. The mechanics that replaced the valves and put it back together never could get it to idle right. It's been missing, shutting off etc.

She dropped the car off at the shop today and under my directions, (they couldn't figure this out for themselves) had them run a compression test. The numbers:
110, 150, 75, 180.
No oil on the plugs, so I'm pretty sure it isn't the rings. This is the reasoning for the bad idle. I can't believe they didn't KNOW why it idled like a lawnmower.

Now, it's an F22B1. He just told me that the F22B1 is a USDM Accord block, and the F22A1 is the JDM prelude motor. It has the H23A head on it. I have no idea which is which anymore.

So, what I'm told is that the H23A1 headgasket didn't fit, so they ran a 96 accord head gasket on it back when they replaced the valves since it was an "Accord" block. He also said that the timing belt wouldn't line up right, and that's why it shredded in the first place.

My questions:
What was the JDM motor that came in the 4th gen Prelude Si?
If this guy is an idiot (which is likely) what head gasket should we run?
Why does the timing belt have troubles fitting?
And is it REALLY an H23A head?

 

wierd.
F22b1 is for sure the USDM (and some JDM) Accord SOHC VTEC Block.

F22B is the JDM Prelude DOHC (and some accords) block stamp.

F22A1 AFAIK is a SOHC NON-VTEC Block from the Lude S.

So what you theoretically have is a SOHC Accord block with a USDM H23a1 Head?

is that correct?

 

yeah, that seems to be the case. I'm pissed. And let me tell you something... it DOESN'T WORK.

 

Goddamn. I have 0 experience with this. Need me to pick you up a F22b timing belt and airship it over? lol.....I can ask the guys at the local honda dealer what the hell is going on and see what they say.

 

JDM Prelude Si came with an DOHC F22B, basically it's an H23A with an 85mm bore. Same stroke, same rods, same head.

If there is an H23a head on it, then it must be a DOHC block, if it fits...the head bolt pattern would be different...

So there is a DOHC head on it?


OKAY

It's a possibility that they took an SOHC F22B1 block, and somehow mated it to an H23 head, again I think that's crazy cause the head bolt patterns are different (I thought).

In that case the timng belt tensioner and balancer belt assemblies are probably not right for the DOHC head. You likely need an H23 Manual timing belt tensioner, which I know has this special washer that comes with it, that if you forget, shreds your timing belt.

Half way through this thread: http://www.hondaprelude.to/forums/sh...threadid=17682

I identify all the pieces an H23a timing belt tensiner needs, compare it to your F22B block.

Also todd give me the block vode and serial number of the engine (right below the block code)


[Modified by satan_srv, 3:51 PM 3/5/2003]

 

THAT BLOWS!!

but glad to see i was right.. ... kinda.... but i did figure the compression was gone in atleast 1 cyl..

anyway, would it be easier to just grab the H23 block from KMS, and maybe find an H23 Head from somewhere?

 

JDM Predlude Si is DOHC F22B only no numbers just like all JDM engines http://www.honda.co.jp/factbook/auto.../pr91-022.html

If the block does indeed say it's F22B1 that is the SOHC VTEC block from a 5th gen accord....the 150 or 145 SOHC engine.....I don't know how they got a DOHC head on there!

Perhaps the F22B1 SOHC VTEC head, H23A and H22A heads have the same bolt pattern.....


[Modified by satan_srv, 4:59 PM 3/5/2003]

 

Speaking of heads... Ive got an h23 head with thottle body attached... "FOR SALE" Get in touch w/ either me or fucatypr if your interested...

 

So is the throttle body glued on there? Or are you saying the intake manifold is also included?

 

ok... It is an F22B.

No numbers after, I looked myself. The mechanic is an idiot.

So, according to HIM, the h23a head gasket didn't line up, which is why he put the head gasket from a 96 Accord. So, where would I find out what head gasket WILL fit, and which one I SHOULD use? And I'll check on the washer thing for the timing belt.

The compression numbers are listed above. There is NO oil on the plugs... so it isn't the rings going bad. We're thinking that the headgasket is slowly going.

So, we're sure that the F22B has the exact same head as the H23A1? I may just go find that old H23A1 block I had laying around that I gave to John.

 

The H23a headgasket doesn't work because the bore on the cylinders is too big (87mm vs. 85mm on the F22B) but other than that it should be the same.

H23a and F22b DOHC heads are the same I am sure of it.

Maybe you need the H23 crank gear that runs the timing belt?

 

well, if the bore is different, then how does the combustion chamber line up perfectly? Or does it? Does it really matter?

Anyone know what head gasket I should tell them to run on this thing?

Cause it's starting to drive worse, and it's really irritating. One day, it's just not going to run at all.

 

Ask in the Accord forum or tech forum what head gasket to use with the JDM DOHC F22B and what timing belt..

 

I have no idea what headgasket it uses. It probably has its own headgasket. I would tell the shop to stop causing you major inconvience and to get you a regular h23a block and head.