which flywheel chevy v8?

[tuloyuser]

Hello everyone,
I've been doing a sort of rebuild of my fj40, I've owned it for about 3 years now and never driven it. Always had hopes though.

So the PO had a chevy V8 from a 76. Would this http://www.jegs.com/webapp/wcs/stores/servlet/CategoryDisplay?catalogId=10002&storeId=10001&cate goryId=19687&parentCategoryId=10763&langId=-1

engine (GM Performance) work with the flywheel from the 76 engine?

Are pre 86 chevy engines internally balanced ie 0 balanced flywheel?
How can I tell which kind flywheel that originally came with the 40?

 

[Vitesse_6]

It would be best to call or ask the people you are buying the engine from.
My '67 327 had a different flywheel than a newer 350. The center hole was about 2.5" in diameter and the newer was about 2"
Good luck

 

[oldIron]

It would be best to call or ask the people you are buying the engine from.
My '67 327 had a different flywheel than a newer 350. The center hole was about 2.5" in diameter and the newer was about 2"
Good luck

X2 - give Jegs a call and tell give them the specifics and they should be more than capable to help you out.

GL

Pete

 

[tuloyuser]

Thanks for the replies,
Just called jegs and according to them that the engine is internally balanced in front and externally balanced in the rear (flywheel). So I guess I need a counterweighted flywheel, the engine is post 86. Darn it, slippery slope this obsession.

Thanks again.

 

[Vitesse_6]

Thanks for the replies,
Just called jegs and according to them that the engine is internally balanced in front and externally balanced in the rear (flywheel). So I guess I need a counterweighted flywheel, the engine is post 86. Darn it, slippery slope this obsession.

Thanks again.

It shouldnt be too difficult to get e new one, I just bought one on Thurs from Checker, I had a core so it only cost $45, Core was about $40
Good luck

 

[tuloyuser]

It shouldnt be too difficult to get e new one, I just bought one on Thurs from Checker, I had a core so it only cost $45, Core was about $40
Good luck

Hi vitesse_6,
From what vehicle the flywheel is from? Because anytime I ask anything from my local parts person they ask Year and make of the car. Anything outside of that I just get a blank stare and no help.
Did you also get a clutch disk?
Does the tooth count matter?

Thanks again for any info.

 

[Vitesse_6]

I told them I needed an 11" flywheel for a '67 truck. Mine was a 168 tooth, It was helpfull to have the one I didnt need so I could make sure I bought the correct one, Bad thing was I sold the one I needed to Bandy Rooster a month ago......

 

[zebrabeefj40]

If they told you the motor is a post '86 then it is a "one piece rear main seal" block. That '67 flywheel that Vitesse_6 just mentioned WILL NOT WORK. The crank bolt patterns are different.

I have an '89 350 from a Blazer. For clutch parts I ask for parts for a '89 Chevy 3500 4x4 with a 350 and a 4 speed (10 spline - same as an SM465). For a flywheel I asked for the 168 tooth version and a 12" heavy duty clutch (IIRC). I think the flywheel ran me $140 7-8 years ago. Ran it for 30K miles then parted the truck. The clutch still looked new. It's going back into the next truck.

HTH,
Nick

 

[zebrabeefj40]

Does the tooth count matter?

Tooth count is an easy way to determine the diameter of the flywheel. The lower tooth count flywheels only take a 10" or 11" clutch while the larger wheels will take an 11" or 12". Most folks like the larger flywheel because the extra mass helps keep the motor from stalling while wheeling. Hotrodders like the smaller flywheel because the light 'wheel spins up faster making the vehicle accellerate faster. I think the 12" clutch can also provide more clamping pressure without making the clutch pedal too stiff.

HTH,
Nick

 

[JRFJ4-]

168 tooth

168 tooth with an 11 inch clutch will be fine. That's what I got on mine.

Post 86 with one piece rear mains were not completely internally balanced.

I think Autozone/Advance had them for about $80.00 a few years back.

JR

 

[theo]

If they told you the motor is a post '86 then it is a "one piece rear main seal" block. That '67 flywheel that Vitesse_6 just mentioned WILL NOT WORK. The crank bolt patterns are different.

I have an '89 350 from a Blazer. For clutch parts I ask for parts for a '89 Chevy 3500 4x4 with a 350 and a 4 speed (10 spline - same as an SM465). For a flywheel I asked for the 168 tooth version and a 12" heavy duty clutch (IIRC). I think the flywheel ran me $140 7-8 years ago. Ran it for 30K miles then parted the truck. The clutch still looked new. It's going back into the next truck.

HTH,
Nick

I agree with this. I also agree with JR that an 11" clutch will work fine.

 

[Vitesse_6]

If they told you the motor is a post '86 then it is a "one piece rear main seal" block. That '67 flywheel that Vitesse_6 just mentioned WILL NOT WORK. The crank bolt patterns are different.

I have an '89 350 from a Blazer. For clutch parts I ask for parts for a '89 Chevy 3500 4x4 with a 350 and a 4 speed (10 spline - same as an SM465). For a flywheel I asked for the 168 tooth version and a 12" heavy duty clutch (IIRC). I think the flywheel ran me $140 7-8 years ago. Ran it for 30K miles then parted the truck. The clutch still looked new. It's going back into the next truck.

HTH,
Nick

Sorry for the misinformation, I was only mentioning what I did, I do know there is a differance between the pre/post '86 FW's
Tuloyuser should know what engine he is dealing with, I simply mentioned I went to Checker and bought one for such and such and that it shouldnt be that difficult to find what he is looking for.
Once again sorry for the misinformation.
Good luck

 

[tuloyuser]

Thanks for all the info everyone!
I finished cleaning/painting hood,fenders,engine compartment today.
So hopefully I can install the engine tomorrow.

I just have a couple of questions.
The previous v8 in it did not have a pilot bearing is this needed for the stock 3 speed tranny? If it is, it goes on the engine crank shaft right?
What is the torque settings for the flywheel?
The pressure plate is at 40# right?

I found 2 separate posts indicating to use silicone rtv and another post
saying to use loctite on the flywheel bolts. I guess its safe to use both?


Thanks again.

 

[zebrabeefj40]

You DEFINITELY need a pilot bushing/bearing! Yep, it goes into the back of the crank.

Loctite on bolts NOT RTV. RTV is appropriate when the bolts go into the water jacket. Flywheel/clutch bolts do not.

HTH,
Nick

 

[tuloyuser]

Ok, I got the right flywheel now, I've got new clutch disk,TO bearing, pilot bearing so ready to install. The problem now is that the bolts I have for
flywheel seem too short. Can I just replace that with longer grade 8 bolt?
Same with the clutch bolts.

Thanks again... I'm hoping to install the new engine in the truck tonight .

 

[zebrabeefj40]

I'd get genuine flywheel bolts as they usually have a larger diameter, thinner head than grade 8 in that thread size. I think a normal grade 8 bolt will hit the clutch disk. Most parts stores have them in the "high performance" section next to the SBC chrome stuff. Bolts for the clutch cover can be replaced with grade 8 and a lock washer.

HTH,
Nick

 

[tuloyuser]

I'd get genuine flywheel bolts as they usually have a larger diameter, thinner head than grade 8 in that thread size. I think a normal grade 8 bolt will hit the clutch disk. Most parts stores have them in the "high performance" section next to the SBC chrome stuff. Bolts for the clutch cover can be replaced with grade 8 and a lock washer.

HTH,
Nick

Thanks zebrabeefj40 and everyone in this forum for being so helpful.