snapper
|
| posted on 1/1/21 at 04:41 PM |
|
|
Helicoil in aluminium?
I have a bad thread in a Duratec that holds the oil pump chain guide, can I use helicoils in aluminium?
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
|
|
|
|
|
DanP
|
| posted on 1/1/21 at 05:04 PM |
|
|
I had helicoils (3/8 UNC) put into an ali head (RV8) in the exhaust manifold bolt holes by an engineering company, so I would assume it would be ok
for the oil pump. Maybe check the thread vs torque ratings to check you can torque them high enough?
[Edited on 1/1/21 by DanP]
|
|
|
r1_pete
|
| posted on 1/1/21 at 05:05 PM |
|
|
Yes, it actually makes a better job than the original tapping.
If its a blind hole just be careful you don't drill through and cause an oil leak.
|
|
|
02GF74
|
| posted on 1/1/21 at 05:41 PM |
|
|
Yes, it will be stronger than the original alloy thread.
I fitted one recently to a cannondale c4 seatpost to allow me to use a m6 bolt, smaller than the original one, to save a few grammes, I know I
know.....
Search ebay for
131pcs Thread Repair Kit Stripped Helicoil M5 M6 M8 M10 M12 Rethread Recoil
£20, all the sizes you are ever likely to need.
You can buy different length coils, as I did, very cheap from China.
[Edited on 1/1/21 by 02GF74]
|
|
|
snapper
|
| posted on 1/1/21 at 06:42 PM |
|
|
Thanks all, it’s an oil pump chain guide so only 10nm, the hole is in the crank cradle so whilst blind would make no difference if I drilled
through.
I did consider drilling out and using a larger bolt but it has a flanged head and a fitted tube spacer so much more involved than a helicoil
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
|
|
|
steve m
|
| posted on 1/1/21 at 07:55 PM |
|
|
I dont think ive ever done a Helicoil in Alui, but as said above, its probably a lot stronger than the original alui threaded hole
steve
Thats was probably spelt wrong, or had some grammer, that the "grammer police have to have a moan at
|
|
|
Dingz
|
| posted on 1/1/21 at 09:27 PM |
|
|
I’ve done M8 and M10 in aluminium with no problems.
Phoned the local ramblers club today, but the bloke who answered just
went on and on.
|
|
|
rusty nuts
|
| posted on 1/1/21 at 09:55 PM |
|
|
Done loads in ally over the years with no problems
|
|
|
snapper
|
| posted on 1/1/21 at 10:06 PM |
|
|
quote:
Originally posted by steve m
I dont think ive ever done a Helicoil in Alui, but as said above, its probably a lot stronger than the original alui threaded hole
steve
As long as the Helicoil doesn’t spin in the new threaded hole I think I’ll be ok, I did think that the weak point will always be the thread in the
ally but as i only need 10nm torque, I’ll be a bit more gentle this time (with my smallest torque wrench set a little below the 13.6nm minimum.
[Edited on 1/1/21 by snapper]
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
|
|
|
coyoteboy
|
| posted on 1/1/21 at 10:14 PM |
|
|
Helicoiling Alu is standard practice on high load and repeat-assembly fasteners, because its much preferable to straight Alu threads.
|
|
|
Shooter63
|
| posted on 1/1/21 at 11:30 PM |
|
|
Last one I did was for a classic mini gearbox oil drain ( alloy gearbox) I just made sure the helicoil didn't overhang the original thread depth
by cutting a coil off, then I used a drop of thread lock on it, the sump plug now runs in and out without catching etc a vast improvement
Shooter
|
|
|
motorcycle_mayhem
|
| posted on 2/1/21 at 11:39 AM |
|
|
I've always had a comprehensive helicoil kit in the paddock, M5-M12 and Imperial.
Not just for alloy (Hayabusa/GSXR clutch slave thread repair (etc., etc., etc.)), but equally essential in magnesium (Dallara gearcases, etc.).
|
|
|
IanmK
|
| posted on 2/1/21 at 03:44 PM |
|
|
Some companies fit helicoils in Aluminium as normal practise as it provides a stronger thread for a component to be screwed into etc.
|
|
|
snapper
|
| posted on 9/1/21 at 08:05 PM |
|
|
UPDATE
Fitted the helicoil, slowly and carefully, was an easy job and works well.
I didn’t read the post about a drop of thread lock when you insert the helicoil and have logged that for future jobs as that is a great idea.
Thanks for all the valuable responses.
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
|
|
|
.jpg)
