Lightened Flywheels - Engines Forum - Peugeot 306 GTi-6 & Rallye Owners Club

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Subject: Lightened Flywheels

Hawkesfire

Regular

Location: Stockton on tees

Registered: 26 Mar 2013

Posts: 180

Status: Offline

Post #1

Hi

just found where the disturbing noise is coming from on my car as when i came back from my first test session it had an intermittent noise like a bottom end rattle!!!!!

I pulled the engine out and took the box off and when i went to remove the flywheel it was loose? after inspection it looks like the bolts had bottomed on the crank and it was only nipping the flywheel so once the power was applied on it it worked lose ?

Anyone else had this problem ?

This is a super high boost engine...

Martry

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206 Rallycross GTI6 SC SHB 425 BHP clutch eater !!!

Posted 5th Mar 2014 at 12:29

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cully

Seasoned Pro

Location: Cullompton

Registered: 12 Jun 2013

Posts: 1,093

Status: Offline

Post #2

Thanks for the heads up just about to fit a lightend fly will be checking the bolt lengths

Posted 5th Mar 2014 at 12:53

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eddy_gti6

Seasoned Pro

Location: Durham

Registered: 20 Oct 2008

Posts: 8,716

Status: Offline

Post #3

I have a lightened and ballance flywheel on mine with standard bolts and has been fine

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Posted 5th Mar 2014 at 13:03

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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,817

Status: Offline

Post #4

flywheel doesn't use "bolts" and isn't into blind holes, so it can't have bottomed out.

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Posted 5th Mar 2014 at 14:17

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Hawkesfire

Regular

Location: Stockton on tees

Registered: 26 Mar 2013

Posts: 180

Status: Offline

Post #5

So what holds the flywheel on then ?

They can bottom out as they are blind drilled into the crank.

Marty

________________________________________

206 Rallycross GTI6 SC SHB 425 BHP clutch eater !!!

Posted 5th Mar 2014 at 14:39

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bigbadbowen

Seasoned Pro

Location: Winchester

Registered: 21 Nov 2003

Posts: 13,752

Status: Offline

Post #6

Are you using original flywheel bolts ?

Posted 5th Mar 2014 at 14:43

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Hawkesfire

Regular

Location: Stockton on tees

Registered: 26 Mar 2013

Posts: 180

Status: Offline

Post #7

Yes why ?

________________________________________

206 Rallycross GTI6 SC SHB 425 BHP clutch eater !!!

Posted 5th Mar 2014 at 15:12

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rich_w

Seasoned Pro

Location: Havant, Hampshire

Registered: 29 Jul 2004

Posts: 5,412

Status: Offline

Post #8

What crank are you using?

The standard crankshaft has thru-holes for the flywheel bolts, so they can't bottom out.

The lightened flywheel has a thinner bolted flange than OEM, to save weight, so you may need shorter bolts if your crankshaft has bolt holes of a finite depth.

Regards,
Rich

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Contact Details:

rich@lynxpowerengineering.co.uk
07732 822546

Posted 5th Mar 2014 at 15:29

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