Jump to content

Welcome to 4GTuner
Register now to gain access to all of our features. Once registered and logged in, you will be able to create topics, post replies to existing threads, give reputation to your fellow members, get your own private messenger, post status updates, manage your profile and so much more. If you already have an account, login here - otherwise create an account for free today!
Photo

4g93t crank gear fitting

- - - - -

  • Please log in to reply
6 replies to this topic

#1
clone

clone

    self employed bum

  • Active Members
  • PipPipPip
  • 1,075 posts
  • LocationTownsville
G'day all.

After ny keyway key go again it spun the debre around the end of the crank shaft and busted pretty much everything. I've got a new gear and harmonic balancer and new thicker keyway. When I go fitting the gear with or without the woodruff key, the gear is very hard to push on. I'm stuck between taking the sand paper to the crank end of a file to the gear to get a better fit. Should these be an interference fit or just slide on and off?

#2
jack be nimble

jack be nimble

    master of none

  • Donating Members
  • PipPipPip
  • 8,301 posts
  • Locationperth sor. 20 mins from brians place
Slide on and off. Maybe the spun gear has galled the crank a bit.
i know k put a new crank in when he spun his gear.
does the balancer go on ok? I think they are same size
4g93t jumbuck conversion. PRANGED 18/3/12, CHECK MY MEMBER RIDES Page 11. no serious human injuries.
ON THE ENGINE STAND. g4cs 2.4l + Gt35r. PLUS: auto conversion + Awd coming.
thanks for parts and help: BMGTZ, EVOCPE, cwolf, Benozi, Jamo-GSR, 1JUM2NV, RXVII..much appreciated, cheers guys.
Aerodynamics are for people who can't build engines. —Enzo Ferrari
REMEMBER: you cant polish a turd, but you can roll it in glitter.

#3
clone

clone

    self employed bum

  • Active Members
  • PipPipPip
  • 1,075 posts
  • LocationTownsville
Okay, well I'm just going to file down all the damage for now and replace. Hopefully it last long enough

#4
jack be nimble

jack be nimble

    master of none

  • Donating Members
  • PipPipPip
  • 8,301 posts
  • Locationperth sor. 20 mins from brians place
Loctite it on. Just do it and hope you never have to pull it off.
loctite is the recommended fix (by bodgys) for holden v6 timing gears that do the same thing.
4g93t jumbuck conversion. PRANGED 18/3/12, CHECK MY MEMBER RIDES Page 11. no serious human injuries.
ON THE ENGINE STAND. g4cs 2.4l + Gt35r. PLUS: auto conversion + Awd coming.
thanks for parts and help: BMGTZ, EVOCPE, cwolf, Benozi, Jamo-GSR, 1JUM2NV, RXVII..much appreciated, cheers guys.
Aerodynamics are for people who can't build engines. —Enzo Ferrari
REMEMBER: you cant polish a turd, but you can roll it in glitter.

#5
leadfoot

leadfoot

    Moderator

  • Moderators
  • 3,429 posts
  • LocationGold Coast

i spun the balancer. and destroey the keyway/woodruff key groove. i replaced the crank and block and don't have any issue similar to what i had. (initially the main bolt wouldn't stay tight (first warning) the it half spun a balancer crank looked ok replaced key and balancer. next was spun balancer completely and my own fault it was so bad driving to sydney and back on a bad one. even if it wasn't so bad i would have replaced as it'll be a comon issue from then on out.

my advice grab a crank balancer and lower gear out of a sohc (they're a dime a dozen) and fit into your 93t. you will have a much much beter peice of mind knowing it wont die in 5k km's

also don't force the gear it's SOFT SUPER SOFT

IMG_0488_zps6c94b256.jpg
IMG_0487_zps037e23a7.jpg
IMG_0480_zpsa821017d.jpg
IMG_0476_zps51b7d5e6.jpg


yes it's me KHUBNER


#6
leadfoot

leadfoot

    Moderator

  • Moderators
  • 3,429 posts
  • LocationGold Coast

the keyway should be a very very tight almost interference fit with the crank timing gear and balancer should slide over snugly


yes it's me KHUBNER


#7
jack be nimble

jack be nimble

    master of none

  • Donating Members
  • PipPipPip
  • 8,301 posts
  • Locationperth sor. 20 mins from brians place
Yep. Basically if the keyway in the crank is sloppy, the gear will fret and chew the key and spin.
You have to stop the fretting. Loctite will work, but i would still be on lookout for another crank and bits.
you can hear them rattle before they spit the key. Generally clack clack at idle.
4g93t jumbuck conversion. PRANGED 18/3/12, CHECK MY MEMBER RIDES Page 11. no serious human injuries.
ON THE ENGINE STAND. g4cs 2.4l + Gt35r. PLUS: auto conversion + Awd coming.
thanks for parts and help: BMGTZ, EVOCPE, cwolf, Benozi, Jamo-GSR, 1JUM2NV, RXVII..much appreciated, cheers guys.
Aerodynamics are for people who can't build engines. —Enzo Ferrari
REMEMBER: you cant polish a turd, but you can roll it in glitter.


1 user(s) are reading this topic

0 members, 1 guests, 0 anonymous users