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ka0tyk

  • Karma: +30/-0
What causes this? flexplate hitting plate mount...
« on: September 09, 2012, 02:46:44 PM »
switched from 3 point to a 4 point mount... the flexplate is new, and its flat... but as you can see in the pic its making contact with the plate mount.  theres a good 1/8" of room between them.  does the crank move around that much? is the flexplate flexing/bad?  i thought it might be the pump pushing forward on the engine but i tried pushing forward on the pump shaft and i cant get it to move at all.

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82daytona

  • Karma: +7/-0
Re: What causes this? flexplate hitting plate mount...
« Reply #1 on: September 09, 2012, 03:03:55 PM »
More lube  ;)
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Ralph Brunt

  • Karma: +51/-0
Re: What causes this? flexplate hitting plate mount...
« Reply #2 on: September 09, 2012, 03:06:47 PM »
my guess is the motor plate is thicker than the original, skinny pto, pump moving n and out, and the flex plate flexing. crank should only move .008 or so.

it will wear itself in, lol
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CHEAP, FAST, RELIABLE...PICK 2 CANT HAVE ALL 3
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They are all fukin tasty. My long time favorite, "Dirty Dicks -beerjet-
Quote from: IRRebel on February 16, 2010, 06:11:01 PM
Glasscutter, Skip, OC2  Nordie and many more nail me good every time, relentlessly, I love those guys!

obnoxious001

  • Karma: +4/-1
Re: What causes this? flexplate hitting plate mount...
« Reply #3 on: September 10, 2012, 12:10:51 AM »
Quote from: ka0tyk on September 09, 2012, 02:46:44 PM
switched from 3 point to a 4 point mount... the flexplate is new, and its flat... but as you can see in the pic its making contact with the plate mount.  theres a good 1/8" of room between them.  does the crank move around that much? is the flexplate flexing/bad?  i thought it might be the pump pushing forward on the engine but i tried pushing forward on the pump shaft and i cant get it to move at all.


In some instances, a flexplate with no torque converter on it will "flex", and may make contact.  I saw one (a new, SFI thick one) make some sparks the other day on an engine I was running on the dyno.  The dyno operator commented that he sees it occasionally. 
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GT Jets

  • Karma: +192/-0
Re: What causes this? flexplate hitting plate mount...
« Reply #4 on: September 10, 2012, 06:53:26 AM »
I see this often. If it really bothers you, pull it and use a router with a speed control and clearance it a bit, seems redneck, but it works like a charm. Or like Ralph says...It will machine itself, it's only aluminum... ;)

GT
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  • Boat #1: 1992 Carrera 20.5 Elite (I/O bitches)
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If i get some free time tonight at work, ill play with it and post it for everyone to see.

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Time to man up and yank it John!  :banghead:
Ray
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