archiebrown
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« on: January 10, 2012, 08:18:23 PM » |
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Hi, I need to replace one of the oil sump bolts as the thread is stripped in the engine block, should I use a heli coil or tap out and replace with a bigger bolt please?
Either way does anyone know the size of the original and what I should replace it with please.
The engine is a Reliant 850 and I have a new sump and gasket on order.
Thanks Archie
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"Too old to die young"-The Big Yin
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tbone
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« Reply #1 on: January 10, 2012, 08:33:34 PM » |
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Hello Archie, 1/4 UNC is the thread size.
Obviously using a larger bolt will also mean drilling the corrosponding hole in the sump pan out, not a difficult job though.
A helicoil kit containing a half dozen or so coils will cost £15 - £20 or there abouts, for pure ease that would be my choice.
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NO I WON`T. aye ok then, i will
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spanners
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« Reply #2 on: January 10, 2012, 08:59:22 PM » |
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if its a side bolt thats drilled right through youve always got the repair option of using a longer bolt ans ,,back nutting,, it
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LIVE FAST and DIE YOUNG,, past 50 AND STILL HERE NOW. WAITING. FOR. THE. GRIM. REAPER
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archiebrown
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« Reply #3 on: January 11, 2012, 06:03:31 PM » |
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Thanks tbone, I was kind of hoping that would be the solution. I will take a close look at the offending bolt at the weekend.
Regards Archie
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"Too old to die young"-The Big Yin
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archiebrown
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« Reply #4 on: January 11, 2012, 10:18:08 PM » |
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 Hi Spanners, it is one of the front bolts, I tried to put a picture in but not that good yet  I think the Helicoil is the way I will go, when I can get outside in the daylight. Cheers Archie |
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« Last Edit: January 11, 2012, 10:35:36 PM by archiebrown »
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"Too old to die young"-The Big Yin
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digger06
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« Reply #5 on: January 14, 2012, 08:32:21 AM » |
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timeserts do special inserts for this sort of job,
had v good results with timeserts,
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Bus Boy
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« Reply #6 on: January 18, 2012, 11:20:15 PM » |
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yep we use timeserts at work......very impressive!!!
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I never wanted to be normal anyways!
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archiebrown
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« Reply #7 on: February 04, 2012, 11:51:19 PM » |
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Got the kit off EBay, did the deed last weekend and it seems to have worked. Cheers Guys
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"Too old to die young"-The Big Yin
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Manky Monkey
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« Reply #8 on: February 05, 2012, 10:37:40 AM » |
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Another problem solved! For future reference, who did you get the helicoil kit from? Would you recommend them?
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On the last freedom moped out of Nowhere City.
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Tony oily bike
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« Reply #9 on: February 05, 2012, 10:53:22 AM » |
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We use thread inserts in Al components at work that need a reasonable torque applied to the fasteners that are being done up and undone on a daily basis., have done for years and no real issues.
There are a couple of tips worth noting tho:
1 The 'tang' at the bottom of the insert (the bit used by the tool to screw the insert in) can (in some cases) be removed. This gives a little more depth of useable thread.
2 In blind holes, don't use a fastener that is too long as it can bottom out and try to dislodge the insert.
For those that aren't aware, "helicoil" is a trade name but kinda gets used a bit generically (its a bit like calling your Dyson vacuum cleaner a Hoover). Worth bearing in mind when your searching for thread inserts. (guess there may be a cost implication too..)
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« Last Edit: February 05, 2012, 11:05:02 AM by Tony oily bike »
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There's nowt as light as a hole, so add lightness.
Our lady of blessed acceleration, don't fail me now! - Elwood Blues
Nitro doesn't add power, it multiplies it! Bob Loux, running 10.07 secs @138mph on a 650 normally aspirated Triumph drag bike in 1965!
"Incontinence Hotline" - please hold.
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Bus Boy
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« Reply #10 on: February 05, 2012, 12:01:42 PM » |
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I never wanted to be normal anyways!
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archiebrown
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« Reply #11 on: February 05, 2012, 05:59:43 PM » |
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« Last Edit: February 05, 2012, 06:03:00 PM by archiebrown »
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"Too old to die young"-The Big Yin
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zx7r-nutter
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« Reply #12 on: February 08, 2012, 03:26:08 PM » |
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I have used helical kits for years with great success. Something i have found, if re-threading an open hole, like a sump etc, you can stop thread creepage with a studlock like loctite 270. Another issue with helical kits can be the length of thread. The kit normal comes with either a 1D or 1.5D insert, meaning the length of the thread equals the diameter or 1.5 x diameter. I am lucky to live close to a company called Margnor, who is a specialist nut and bolt shop, and a VERY good one. They sell individual inserts for helical kits, so you don't have to buy a new kit when you used up your 10 inserts, but more interesting is that they do inserts in different depths. i have got 2D inserts from them in the past for different threads. Their website does not list all their products, so give them a call if you don't find what you need. http://www.margnor-online.co.uk |
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