Flywheel bolts for a Fidanza Flywheel?

[kristmen]

I just picked up a Fidanza flywheel for my 6bolt awd. I also got one of the A/T flex plate spacer rings to use with it.

I was told that because this setup is thicker, I need longer bolts. Something about 4.5 mm longer bolts that are oem?

What model dsm had the 4.5mm longer bolts? Someone told me 2G, someone else said ya I think its 2G but I think its 2G Automatic...

I tried searching and couldnt find anything. Anyone know or know where there is a thread with this info?

[Mindslayer]

You can go to Force Performance and buy the kit like I did for 45 bucks. I got it this week when i brought my cams.

[Dauntless]

Hmm, this is a timely topic, as I am thinking of buying a Fidanza for my new 6-bolt. Do they always need the spacer and special bolts? I've looked at a number of websites selling these flywheels, yet none have mentioned this. Thanks!

[Mindslayer]

Its best to be safe than sorry,IMO

[kristmen]

Originally Posted by Mindslayer

You can go to Force Performance and buy the kit like I did for 45 bucks. I got it this week when i brought my cams.

That doesnt really tell me what I want to know. I want to know what kinda bolts they use with that kit. That kits some what over priced. I already have that A/T spacer there kit includes anyway. I paid $6 dollars for it from the dealer.

Then I called the local Honda dealer who sells Mitsubishi parts, 2G A/T flywheel bolts are $1.97 each and they are Mitsubishi OEM, not some off brand.

Stainless high grade studs and copper lock washers are like another $10 locally too.

Cheaper then ordering that FP kit.

I just need to verify the bolts are infact 2G A/T and not 2G M/T.

[kristmen]

Originally Posted by Dauntless

Hmm, this is a timely topic, as I am thinking of buying a Fidanza for my new 6-bolt. Do they always need the spacer and special bolts? I've looked at a number of websites selling these flywheels, yet none have mentioned this. Thanks!

Yes its a good idea to use the spacer and longer bolts. The Fidzana flywheel is 4mm thicker then the stock flywheel so you get less bolt threads in the crank. They tend to come loose even with loctite.

The simple fix it to buy the OEM bolts that are 4.5mm longer and then the automatic flywheel spacer plate. The plate sits on the flywheel so the heads of the bolt mate againest steel instead of the aluminum of the flywheel. This allows for more torque plus it doesnt mess up your pretty new flywheel.

In some cases you need to tap out the crank bolt holes with a end tap. The holes are already deep enough though so no drilling is needed. You just need to add a couple extra threads so the bolts dont bottom out on the threads. If they bottom out on the threads the bolts might not be tight enough and cause them to come loose.

Then I've spoke to others like Scott Grey and Josh Jones who use normal M/T 1G bolts without issue. Anyone who knows these guys knows they know there shit.

I guess I just want go the safest route myself to avoid issues later.

[Evil1gDsm]

Originally Posted by kristmen

I just picked up a Fidanza flywheel for my 6bolt awd. I also got one of the A/T flex plate spacer rings to use with it.

I was told that because this setup is thicker, I need longer bolts. Something about 4.5 mm longer bolts that are oem?

What model dsm had the 4.5mm longer bolts? Someone told me 2G, someone else said ya I think its 2G but I think its 2G Automatic...

I tried searching and couldnt find anything. Anyone know or know where there is a thread with this info?

me and my buddy did mine this past weekend...I just bought new flywheel bolts..Worked / is working fine for me!...dan

[kristmen]

Originally Posted by Evil1gDsm

me and my buddy did mine this past weekend...I just bought new flywheel bolts..Worked / is working fine for me!...dan

I assume you mean you just bought new stock flywheel bolts.

Yes I'm sure it worked fine if you just did it this past week. Hell you might never have issues depending how you drive your car.

If you used a Fidanza flywheel though its 4mm thicker thus meaning less of the bolt threads are in the crank now. Meaning the bolts dont have the same thread torque they did before.

Down the road it could come loose and trash the flywheel and crank.

I just want to take all possable steps to avoid this from the start rather then bitching later because I didnt do something I could have from the start =)

I'm almost thinking about buying a set of Supra flywheel bolts from ARP. They have one thats thread pitch matches a DSM and they are like 5.x mm longer too. You can torque the HELL ouf of them too because they are stronger then oem DSM flywheel bolts plus they are longer yet so you get more thread contact.

[Rob Rohr]

Originally Posted by kristmen

Yes its a good idea to use the spacer and longer bolts. The Fidzana flywheel is 4mm thicker then the stock flywheel so you get less bolt threads in the crank. They tend to come loose even with loctite.

The simple fix it to buy the OEM bolts that are 4.5mm longer and then the automatic flywheel spacer plate. The plate sits on the flywheel so the heads of the bolt mate againest steel instead of the aluminum of the flywheel. This allows for more torque plus it doesnt mess up your pretty new flywheel.

This great info Does anyone have the A/T spacer plate part # handy?

Anyone else found a good inexpensive bolt from another car for this application? It can't be that hard to find longer bolts. Anyone know the bolt size, length and thread pitch?

[kristmen]

Originally Posted by Rob Rohr

This great info Does anyone have the A/T spacer plate part # handy?

Anyone else found a good inexpensive bolt from another car for this application? It can't be that hard to find longer bolts. Anyone know the bolt size, length and thread pitch?

Yes it's MD952138 for the 6 bolt a/t spacer and MD760086 for the 7 bolt. If you want to see what the spacer looks like, its the metal plate with the bolt holes in it located here:

http://linux.forcedperformance.net/m...ode=DSM-Engine

Although I pieced the kit together myself for less.

I talked to some people running these bolts and they all say 2G a/t bolts so thats what I ordered.

They cost me like $1.97 each I think it was. Will be at the dealer Friday and I'll know for sure if they are the right ones altho everyone says yes so I'm sure they are.

Don't forget you need to end tap the crank in most cases. Make sure it is an end tap though, not a normal tap.

[91_talon_at]

the botl pattern of the bolts are the same as the exhaust manifold studs. you acutally can get it about any auto parts store. 8mmx1.25 is the thread size. i just used exhaust manifold studs which were about the length that FP suggested and got some lock washers and nuts. works like a charm!

[kristmen]

I thought we were talking about the flywheel bolts :P

Anyway I looked threw caps. I cant figure out for sure which bolts are the longer ones. I'm going to do some calling around tomarrow.

I did find a part number for a 12x26mm flywheel bolt though. The stock M/T ones 12x22.5mm. Thats like an extra 3.5 mm which would help make up for the fact the Fidanza is 4mm thicker but I know there is a 4.5mm one too.

[Rob Rohr]

Originally Posted by kristmen

I did find a part number for a 12x26mm flywheel bolt though. The stock M/T ones 12x22.5mm. Thats like an extra 3.5 mm which would help make up for the fact the Fidanza is 4mm thicker but I know there is a 4.5mm one too.

Now I am confused I think we are talking about the bolts that hold the flywheel to the crank, right? If you found some that are 3.5mm longer those would be great. Do you have the part #? I don't want to mess around taping the crank so I will go slightly shorter rather than longer.

Thanks for your help

[xEM1x]

I have a fidanza 8lbs 6bolt flywheel, I bought new OEM Flywheel bolts. I measured and it is no where near 4mm its like 1/3 of a mm. No clue where you guys are getting your facts about fidanza. At least for a 6 bolt flywheel.
I would not even be half a thread difference. Dont worry about it, how many people do you hear on the board saying their flywheel bolts flew off?

IDK, IMO i wouldnt buy a kit to install a flywheel. Unless fidanza or ACT recomended it.

-Brian

[kristmen]

Originally Posted by xEM1x

I have a fidanza 8lbs 6bolt flywheel, I bought new OEM Flywheel bolts. I measured and it is no where near 4mm its like 1/3 of a mm. No clue where you guys are getting your facts about fidanza. At least for a 6 bolt flywheel.
I would not even be half a thread difference. Dont worry about it, how many people do you hear on the board saying their flywheel bolts flew off?

IDK, IMO i wouldnt buy a kit to install a flywheel. Unless fidanza or ACT recomended it.

-Brian

Quite a few have had the flywheel come loose because of this. In fact people I personally know have had them come loose because of this. It trashed there flywheel and crank.

Look around man. Others have measured the Fidanza too and there’s are 4mm thicker.

In fact I've never heard of anyone say its not thicker by 4mm. You are the first.

A quote from FP's webpage.

"Many do not realize this fact but many aftermarket aluminum flywheels are 4mm thicker in the bolt flange area than the stock DSM flywheel. Using stock length bolts results in insignificant thread engagement and reduced clamping strength as well as contributing to the bolts just plain coming out of the crank and the flywheel coming loose!

Our hardware kit replaces the stock bolts with high quality OEM grade bolts that are 4.5mm longer than stock to get achieve proper thread engagement and eliminate bolt loosening."

This includes the Fidanza.

I found some bolts that are 3.5 mm thicker and I'll post the part number later for those of you who want it.

I ended up going with ARP Toyota Supra Flywheel bolts which are 5.4mm longer then stock. We checked my bolt holes, checked my thread took measurements on the a/t spacer, flywheel and bolts and found even at 5.4mm longer we don’t need to end tap my crank it seems.

We are going to go over the math again tomorrow but my friends 99% positive we are good to go.

[xEM1x]

kristmen, I will supply pictures tomorrow. I think all the newer fidanza's are the same size now.

[Mindslayer]

Originally Posted by xEM1x

I have a fidanza 8lbs 6bolt flywheel, I bought new OEM Flywheel bolts. I measured and it is no where near 4mm its like 1/3 of a mm. No clue where you guys are getting your facts about fidanza. At least for a 6 bolt flywheel.
I would not even be half a thread difference. Dont worry about it, how many people do you hear on the board saying their flywheel bolts flew off?

IDK, IMO i wouldnt buy a kit to install a flywheel. Unless fidanza or ACT recomended it.

-Brian

Force Performance knows what they are talking about. I've been around the dsm world for 7 years. And I respect them and what they say. Alot of the top FASTEST DSM use their products. And they do their research and show and prove. So just because you flywheel havn't came off yet. Don't mean it's not true. I rather be save than sorry before you mess up your tranny or worst. The kit is 45 bucks if you don't have 45 bucks.Or want to spend 45 bucks why you driving a DSM. Gas alone is that for a week or two.

[xEM1x]

I measured and they came out like this, is my flywheel still going to fall off?
It comes out to be maybe a thread or less difference, i measured again and the thickness was the same for the holes. I am a proud owner of a DSM, i have spent a lot of money on parts for my car. All im saying is check before you buy, its simple. I know forced performance is a good company, I was not bashing them at all. I have a few of their products. All and all here is my pics: the pic 3 is the Fidanza, and pic 4 is stock.

[kristmen]

I'll take you some pictures of my m/t bolts vs. a/t bolts vs. ARP bolts tonight too.

I don’t know man, everyone has different experiences but I do trust FP's knowledge. Its not just them though. A lot of people say the same thing. From what I’ve seen, they are right.

[xEM1x]

Originally Posted by kristmen

I'll take you some pictures of my m/t bolts vs. a/t bolts vs. ARP bolts tonight too.

I don’t know man, everyone has different experiences but I do trust FP's knowledge. Its not just them though. A lot of people say the same thing. From what I’ve seen, they are right.

What are you trying to say? My bolts thread the same with the aftermarket flywheel as well as my stock one? Does that mean the flywheel that came with my car from the factory is gonna break off?

Im just saying, not all aluminum flywheels are the 4mm thicker, FP's site even states that.

"Factory and some aluminum flywheels are .400" thick at the flange, other aluminum flywheels are .500" thick, which makes a longer bolt necessary. Either way the extra length provides fastener stability." -FP.com

Not every fidanza needs that kit. Do some research before you buy is all im trying to get across.
-Brian

[Evil1gDsm]

Originally Posted by kristmen

I assume you mean you just bought new stock flywheel bolts.

Yes I'm sure it worked fine if you just did it this past week. Hell you might never have issues depending how you drive your car.

If you used a Fidanza flywheel though its 4mm thicker thus meaning less of the bolt threads are in the crank now. Meaning the bolts dont have the same thread torque they did before.

Down the road it could come loose and trash the flywheel and crank.

I just want to take all possable steps to avoid this from the start rather then bitching later because I didnt do something I could have from the start =)

I'm almost thinking about buying a set of Supra flywheel bolts from ARP. They have one thats thread pitch matches a DSM and they are like 5.x mm longer too. You can torque the HELL ouf of them too because they are stronger then oem DSM flywheel bolts plus they are longer yet so you get more thread contact.

When i bought my Flywheel, from AMS I asked them..They said to use standard flywheel bolts...Then when i bought my clutch from Slowboy Racin, i ask them...They said the same, i may have a problem and i may not...But those are 2 very well known companies...And their word is trusting...but that's what i think man....do what ya gotta do...dan