Craigorypeck
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| posted on 15/1/11 at 08:44 PM |
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Helicoil sizes
I've went and stripped threads out of my engine head. It's a 10mm bolt hole.
So do I just get an m10 helicoil? I've seen different ones advertised ie. m10x1, m10x1.25, m10x1.50.... etc
How do I figure out which I need? and what size drill bit do I need.
Dont want to buy a whole kit for one repair.
Many Thanks
Edit- what about a timesert? Any good??
[Edited on 15/1/11 by Craigorypeck]
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britishtrident
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| posted on 15/1/11 at 09:05 PM |
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You need to know the pitch of the bolt thread 1.25, 1.5 or 1.75 or 2 using a thread gauge or by comparing with an M10 bolt or tap of known pitch.
Single size helicoil kits come complete with the correct drill and tool cost about £12 to 25 off ebay.
Helicoil is best suited to your needs.
[Edited on 15/1/11 by britishtrident]
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dhutch
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| posted on 15/1/11 at 09:56 PM |
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Yes, thats the pitch, most M10's are 1.5mm pitch if im correct.
If you have a bolt and a decent steel rule you can simply measure ten or so threads!
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RazMan
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| posted on 15/1/11 at 11:12 PM |
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You will need to get the full kit as the correct drill size and tap is supplied, along with a selection of inserts and the tang breaker tool.
Admittedly you might be able to source them all separately but kits are not too expensive at £13.52
here
[Edited on 15-1-11 by RazMan]
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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rusty nuts
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| posted on 16/1/11 at 11:56 AM |
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A set of thread pitch gauges cost peanuts , will last a lifetime and will ensure you get the correct Helicoil kit. I've been in the motor trade
over e 40 years and still use mine . Don't remember ever getting a drill bit in any Helicoil set , I've always had to buy it separately,
the size is normally printed on box.
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Craigorypeck
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| posted on 16/1/11 at 12:05 PM |
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Heres the culprit. calipers at 10mm... How is the pitch worked out? Thanks
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jacko
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| posted on 16/1/11 at 01:41 PM |
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Looks like 1.5mm standard to me metric
what dose the bolt hold on ?
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flibble
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| posted on 16/1/11 at 02:40 PM |
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quote:
Heres the culprit. calipers at 10mm... How is the pitch worked out? Thanks
It's mm between thread peaks, easiest way with no gauge is measure across say 10 threads then divide by 10 (or however many threads you measured
across).
[Edited on 16-1-11 by flibble]
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Craigorypeck
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| posted on 16/1/11 at 03:17 PM |
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quote:
Originally posted by jacko
Looks like 1.5mm standard to me metric
what dose the bolt hold on ?
Cam belt tensioner... Having a weird noise up front and all the adjusting of the tension eventually stripped it out... 
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britishtrident
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| posted on 16/1/11 at 03:58 PM |
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10mm is a very small dia for a head bolt, what engine ?
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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Craigorypeck
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| posted on 16/1/11 at 04:05 PM |
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Not a head bolt, YB cam pulley tensioner.
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