52 Rat

iTrader: (4)

I attempted to install my Fadanza aluminum flywheel today and noticed the bolts bottomed out before pulling the flywheel flush to the crank. I noticed the OE flex plate has a thin spacer on the back. Is there a flywheel spacer required for this application? My Lq9 6.0 engine is a 2002 model. Any advise is greatly appreciated.

spaz1

iTrader: (9)

I would just grind the ends off the bolt threads. unless you have clearance to run the spacer. Make sure the heads dont' hit on the clutch disk. I thought only the autos ran the spacer..

52 Rat

iTrader: (4)

I'm thinking there is a difference in the LS1 crank and the Lq9. I'm concerned about the spacing in regards to the starter engagement. However, the pilot bearing installed with no issues.

garys 68

iTrader: (1)

I've got an 02 LQ9, an 02 LS1 flywheel and bolts, an 02 LQ9 starter, everything works.

52 Rat

iTrader: (4)

Do you have a Fidanza aluminum flywheel or OE? My OE flywheel bolts have a shoulder and the bolt bottoms out before pulling the flywheel to the crank. The counter bore in the aluminum flywheel may be a little deep. I guess I can use washers under the bolts. I assume the Fadanza flywheel would be OE spec. I thought I need flywheel bolts so I went to the dealer to purchase flywheel bolts and they said the flywheel and flex plate used the same bolts.

garys 68

iTrader: (1)

I used an aftermarket steel flywheel/clutch combo. I bought the bolts from a GM dealer. Sounds like your flywheel might be thinner?

52 Rat

iTrader: (4)

The manufacture said it was to OE spec. I'm thinking the counter bore for the bolt heads are a little deep causing the bolt to bottom out. I'm going to measure the flex plate and the flywheel hight today.

garys 68

iTrader: (1)

Did you compare LS1 flywheel bolts to LQ9 flexplate bolts? Are your flexplate bolts for the flexplate that requres the spacer?

52 Rat

iTrader: (4)

I don't have any LS1 flywheel bolts to compare to. The parts guy at the GM dealer said the bolts were the same for the LS1 and Lq9. I spoke with a engineer from Fidanza and he said their aluminum flywheel was the same thickness as the OE cast flywheel. He said I need a shorter bolt.

Chris442

iTrader: (1)

I've got this flywheel, but it's on an LS2. If your LQ9 originally came with a 4L80E attached to it, it should have a spacer between the crank and the flexplate that is about 1/4" thick. If that was there the bolts will definitely be too long.

The crank in your LQ9 should be the same as just about every LS motor out there with the exception of 4.8s, LS7s, LSAs, LS9s and LS3s with dry sump oiling.

I'd replace the bolts when I replaced the flywheel, as a precaution, anyway. They do come with some type of threadlocker on them, and I'd really hate to see these bolts back out.

52 Rat

iTrader: (4)

I had stated Lq9 but I meant Lq4; should be the same crank. My engine came out of a '02 2500 HD with a 4L80E trans. The flex plate does have a spacer on the crank side. The spacer is attached to the flex plate. I will look at it closer this weekend. What bolts did you use?

Bo185

The LQ9 never came infront of the 4l80. The 4l65/70 was the only trans offered with it. So the LQ9 never had the spacer.


What trans are you using with the flywheel? You most likly just need the shorter bolts and no spacer unless using an earlier trans and clutch.

52 Rat

iTrader: (4)

I am using a 96' converted TL1 T56. I installed the LS midplate and input shaft. My Lq4 had a 4L80 trans. I'm going to get shorter bolts tomorrow. I ordered ARP flywheel bolts but they would not work with the aluminum flywheel. The ARP bolts have a thicker shoulder and would not seat properly.

Chris442

iTrader: (1)

Yep, shorter bolts and no spacer. That spacer is only used with the 4L80E, at least from a factory standpoint.

Bo185 is right, too; LQ9 means a 4L60 derivative. Doesn't matter since you've got an LQ4, anyhow.

I can see how the ARPs wouldn't work. The stock bolts almost seem like they won't fit into the hole in the flywheel, but they do, just snugly.

52 Rat

iTrader: (4)

Problem solved; all I needed was the correct bolts. I finally talked to someone at the GM parts counter that could help. I purchased flywheel bolts for a 2002 Camaro SS with a T56.

Bo185

Its actually used with the NV4500 in the LQ4 and the NV3500 flywheels with the 4.8L's I believe, but I have just always done auto swaps! o lazy to shift!