400 is in but with a problem
Le Mans Master
Joined: Aug 2010
Posts: 9,272
Likes: 17
Clean the end of the crank, take the washer off of the big crank bolt , it should catch enough threads to allow you to use it to push the dampener on a bit, then reinstall the washer and push it the rest of the way on. make sure you get it indexed right on the key, if you dont you'll push the key out and then you'll have to remove it again, hope this helps
Melting Slicks
Joined: Nov 2008
Posts: 2,765
Likes: 5
Well it’s going to have to come off regardless to be replaced with a 6 ¾ it doesn’t sound like spacers is really an option after all it’s not a golf cart. 
I’ll post a picture when I get it off. I checked and the local parts stores carries them but I’m sure there going to ask what vehicle it’s for, I hope there descriptions give them sizes.
Is correct to say the L98 is internally balanced then?
I’ll post a picture when I get it off. I checked and the local parts stores carries them but I’m sure there going to ask what vehicle it’s for, I hope there descriptions give them sizes.
Is correct to say the L98 is internally balanced then?
The flexplate flywheel is externally balanced with the crankshaft.
How a friend that runs an engine & diesel rebuild machine shop explained it to me in the past.
Race Director
Joined: Apr 2003
Posts: 17,700
Likes: 1,667
From: moraga ca
You may be able to get away with installing the dampner without the correct tool, but if you pull the threads out of the crankshaft snout by grabbing only a few threads, you and your crank are in deep doo doo.
Drifting
Joined: Oct 2006
Posts: 1,328
Likes: 14
From: Stafford Connecticut
Thats the idea of the longer bolt.You can thread the bolt in pretty far and not worry about pulling the threads out.The stock bolt is not long enough to use .You cannot get enough threads in and it can strip the threads.As far as the 80001 being the correct damper I looked it up on their site and it seems to be the one I have on my 400.But you need to call their tech line to be absolutely sure.
Last edited by steven mack; May 15, 2011 at 08:29 PM.
Melting Slicks
Joined: Nov 2008
Posts: 2,765
Likes: 5
Purchase from Summit, Jegs, Powerhouse Tools, or your local Speed shop.
You are on the East Coast, there should be plenty of speed shops left.
Like Willie said,...........pull the threads out of your 400sbc crankshaft front snout & you will be very sorry.
If stock crank, it is only cast iron & soft material compared to billet 4340 chrome moly steel used on premium racing cranks like CROWER's.
Autozone, Pep Boys, and others should have the correct balancer tool to rent out also.
I would buy a MOROSO sbc balancer installer, when done it will be a very welcome addition to your home garage toolbox for generations to come.
BR
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Drifting
Joined: Oct 2006
Posts: 1,328
Likes: 14
From: Stafford Connecticut
I agree for someone new to working on cars it's not worth the risk of stripping the threads Get the right tool.I have done it enough times my way that I am comfortable that I wont strip the threads .
Race Director
Joined: Nov 2003
Posts: 12,221
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
Correct...unless you'd rather do the balancer just once.
FYI:
http://forums.corvetteforum.com/c4-t...rket-junk.html
FYI:
http://forums.corvetteforum.com/c4-t...rket-junk.html
Race Director
Joined: Nov 2003
Posts: 12,221
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
Race Director
Joined: Apr 2003
Posts: 17,700
Likes: 1,667
From: moraga ca
Thread Starter
Pro
Joined: Nov 2009
Posts: 583
Likes: 0
From: Maple Grove Minnesota
From what I have seen at the auto stores to rent an installer it will not be an option. I have seen four of them but they are all over 6” long, this won’t work when you only have about 4 ½” to work in. I’ll have to get a grade 8 bolt that is longer and go that route to install.
Drifting
Joined: Oct 2006
Posts: 1,328
Likes: 14
From: Stafford Connecticut
If you go the longer bolt to install your damper you will need to finish the install with the factory bolt.the longer bolt will only let you press the damper about 3/4 's of the way on.
Thread Starter
Pro
Joined: Nov 2009
Posts: 583
Likes: 0
From: Maple Grove Minnesota
Balancer went on with no issues. With a 3 ½” & 4” grade 8 bolt some spacers, one custom made out of a small block of aluminum I had lying around she went right on. 
Thanks Steven for the tip I don’t think an install tool would have fit into the space I had to work in. All I have left to do is set the timing, idle, & TPS then Drive.
Almost forgot I also have to run a new vacuum line to the HAVC controller. I found when the motor was out the hard line that goes through the firewall was broken and melted shut. No wonder I couldn’t change the air flow from heat to defrost. Thanks to all.
With a 3 ½” & 4” grade 8 bolt some spacers, one custom made out of a small block of aluminum I had lying around she went right on. Thanks Steven for the tip I don’t think an install tool would have fit into the space I had to work in. All I have left to do is set the timing, idle, & TPS then Drive.
Almost forgot I also have to run a new vacuum line to the HAVC controller. I found when the motor was out the hard line that goes through the firewall was broken and melted shut. No wonder I couldn’t change the air flow from heat to defrost. Thanks to all.