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| The Pub For General Automotive Related Talk |
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07-07-2021, 07:46 PM
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#1 | ||
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Starter Motor
Join Date: Sep 2015
Posts: 4
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I have just noticed my third bonnet protector on my 2018 Everest cracking, the original factory protector flew off the car after only a few months ( I hand just removed and reinstalled to clean under it ) and subsequently two others aftermarket protectors I purchased also cracked.
I made sure that the screws weren’t over tighten and even used Loctite on the screws so that they were not to tight. On my last bonnet protector I started from scratch, I removed all the clips and used the new ones that came with the protector. The positioned of the screw holes were all central. The plastic did not appear to be under any stress at all. This last one only lasted less then a month and driven under 100km at city speeds. I do have a rhino bull bar and just wondering if it’s deflecting air up and under and stressing it. Any thoughts would be appreciated. |
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07-07-2021, 08:03 PM
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#2 | ||
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Al
Join Date: Feb 2015
Location: South Aus.
Posts: 1,878
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expansion - contraction, vibration fatigue. ??
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10-07-2021, 06:00 PM
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#3 | ||
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Starter Motor
Join Date: Sep 2015
Posts: 4
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It was only 2 weeks old on and travelled less than 100 km.
The way it’s cracking I believe it’s due to Flexing it’s being lifted by and up-draught coming off the bull bar. |
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07-07-2021, 11:23 PM
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#4 | ||
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FF.Com.Au Hardcore
Join Date: Dec 2004
Location: Canberra Region
Posts: 9,056
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What brand? Are they cheap ones off ebay?
__________________
2016 FGX XR8 Sprint, 6speed manual, Kinetic Blue #170 2004 BA wagon RTV project. 1998 EL XR8, Auto, Hot Chilli Red 1993 ED XR6, 5speed, Polynesian Green. 1 of 329. Retired 1968 XT Falcon 500 wagon, 3 on the tree, 3.6L. Patina project. |
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10-07-2021, 06:01 PM
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#5 | ||
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Starter Motor
Join Date: Sep 2015
Posts: 4
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Both types factory and eBay.
I believe it’s due to flexing from an updraught created by the bull bar. |
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11-07-2021, 10:02 AM
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#6 | |||
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Frankenford pilot
  
Join Date: Feb 2008
Posts: 19,241
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Quote:
Might help rule that out or not.
__________________
Cheers Bretto 73 XB GT Last of the Big Ports  |
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08-07-2021, 09:56 PM
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#7 | ||
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FF.Com.Au Hardcore
Join Date: Jun 2010
Posts: 2,704
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You may have Casanova fingers
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10-07-2021, 06:03 PM
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#8 | ||
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Starter Motor
Join Date: Sep 2015
Posts: 4
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I may have over tighten the first one which I doubt but not the other two I used Loctite so that I wouldn’t over tighten them, finer tight with a small driver.
I believe it could be due to flexing from an updraught created by the bull bar. |
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10-07-2021, 06:03 PM
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#9 | ||
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Al
Join Date: Feb 2015
Location: South Aus.
Posts: 1,878
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Try reinforcing & painting??
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10-07-2021, 06:27 PM
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#10 | ||
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Moderator
 
Join Date: Jun 2006
Location: Foothills of the Macedon Ranges
Posts: 18,606
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Loctite nutlock etc. contacting with plastic makes the plastic go brittle.
Never use Loctite with plastic unless its the Loctite adhesive thats designed to be used with plastic. I'd use nuts with nyloc inserts with the screws to ensure they don't loosen. |
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10-07-2021, 08:19 PM
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#11 | ||
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Banned
Join Date: Nov 2016
Location: Perth Australia
Posts: 3,618
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I would drill a bigger hole in plastic and fit a rubber grommet, the ID which would be the size of the bolt, and a small stainless washer or even fibrelock washer or both, and don't overnighter them, too rigid!
Cheers King Billy
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Cracking bonnet protectors
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