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Author F28 & gearbox mount troubles
Danny W
Organiser: East Midlands
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Registered: 14th Nov 05
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21st Oct 12 at 08:36   View Garage View User's Profile U2U Member Reply With Quote
Got a c20let corsa and it appears to have pulled the rear gearbox mount clean out the box.

Top bolt threads are ok
middle threads are f**ked

F28 box by the way.

Any ideas on how to sort or get this sorted?
Nic, did you have a similar problem?


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jay26
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Registered: 22nd Feb 08
Location: North Lincolnshire
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21st Oct 12 at 08:48   View User's Profile U2U Member Reply With Quote
Helicoil the gear box if the casing is ok
bigron1988
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Registered: 29th Aug 09
Location: Southport, Merseyside
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21st Oct 12 at 09:01   View User's Profile U2U Member Reply With Quote
If not you can change half the casing over to a different one
Nic Barnes
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21st Oct 12 at 10:02   View User's Profile U2U Member Reply With Quote
Weld it, re-drill it. I've had the gaps plated up in mine.

Are you using a 2 bolt mount or a 3? It's much stronger on a 3 bolt.
Danny W
Organiser: East Midlands
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21st Oct 12 at 10:12   View Garage View User's Profile U2U Member Reply With Quote
casings ok on this apart from the thread.

Ben, i would but dont have a spare good casing im affraid.

Nic, using a 2 bolt mount, whats the 3 bolt look like if youve a pic available?

unfortunately i cant weld ally, would a helicoil be upto the job ?

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Nic Barnes
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21st Oct 12 at 10:21   View User's Profile U2U Member Reply With Quote
Helicoil will be stronger than the original threads yeah.

http://bit.ly/RblE0E

Weld that to mount so it attaches to 3 bolt holes on the gearbox. Do you have a lot of play in your rubber mounts out of interest?
Danny W
Organiser: East Midlands
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21st Oct 12 at 10:25   View Garage View User's Profile U2U Member Reply With Quote
nice one cheers nic, just the answer i was looking for

i'll get one of them on order now, both engine & front box mount were replaced when i swapped the engine only one i didnt do at the time was the rear mount :/

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Nic Barnes
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21st Oct 12 at 14:03   View User's Profile U2U Member Reply With Quote
take it you already run the gearbox spacer? are the bolts long enough out of interest?
Crana
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Registered: 20th Jan 09
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21st Oct 12 at 22:01   View User's Profile U2U Member Reply With Quote
Just had this problem with mine but with a F20, haven't got a picture of the bent rear mount but heres what was left of the bolts


Mine broke the mount so my mate made this for me also used loads of thread lock and longer bolts been sweet since




[Edited on 21-10-2012 by Crana]
Nic Barnes
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21st Oct 12 at 22:07   View User's Profile U2U Member Reply With Quote
that wil have been where you cut the lip off so it fits against the box yeah? i had the same happen years ago. made a stronger mount like above then it started to split the and crack the casing where it bolts on pmsl. bloody gearboxes.
Crana
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21st Oct 12 at 22:35   View User's Profile U2U Member Reply With Quote
its chopped for that 3 bolt spacer like the above to fit
Nic Barnes
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21st Oct 12 at 22:54   View User's Profile U2U Member Reply With Quote
Did you not just weld the spacer bracket etc on to the mount or have you just bolted it up?
Crana
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22nd Oct 12 at 12:33   View User's Profile U2U Member Reply With Quote
Still bolted on welder is crap didn't want to warp anything also you would need to make sure they lined out 100%
bigron1988
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Registered: 29th Aug 09
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22nd Oct 12 at 18:04   View User's Profile U2U Member Reply With Quote
miine is only bolted up
Crana
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22nd Oct 12 at 21:31   View User's Profile U2U Member Reply With Quote
Gearbox will only last so long on a let corsa in anyways i've started to collected f20/f18 gearboxes
Nic Barnes
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22nd Oct 12 at 21:44   View User's Profile U2U Member Reply With Quote






i got mine welded together. had the gaps in the casing welded up as well as i really got sick of cracking the casing, and bending/twisting the rear mount. still bloody happened again at pod ffs.
Crana
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22nd Oct 12 at 22:18   View User's Profile U2U Member Reply With Quote
I'm doing something like this over winter hoping it will help out with engine movement ect
Nic Barnes
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22nd Oct 12 at 22:20   View User's Profile U2U Member Reply With Quote
i looked into that as well, was going to make downpipe removal an utter twat so gave up on it for now. i

 
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