Helicoil blues

Kiwicol said:

Had a read, wow, just shows ya don't know what ya don't know. Thx, very informative article.

Click to expand...

DesertRat said:

You're very welcome Mr Kiwi,

The R3 project will be my first Race Motorcycle Project. I do have a base of an Automotive Engineering Degree.

I started off Street Racing @ 15 when you either Got a Bigger/Softer Tire or learned how to Feather the Throttle and learned shift points by knowing your Camshaft Profile/Torque Curve/Final Gear Ratio/Tire size to launch as hard/quickly as you could. None of today's cheating using..... an ECU during WOT to electronically adjust Timing/AF Mixture and Electronic Feathering the Throttle all simultaneously..lol

I've designed and worked on many a Chevrolet Race Engines/Transmissions and Chassis, Off-Road Vehicles, UTVs, Consulted on Aviation Power Systems, Aviation and Ground Based Communications Systems- and have still have an active EMT License @ >60 years young.

NEVER STOP LEARNING.

I'm no expert but I'm still always eager to share what I do know and learn new things along the way.

Click to expand...

DesertRat said:

You're very welcome Mr Kiwi,

The R3 project will be my first Race Motorcycle Project. I do have a base of an Automotive Engineering Degree.

I started off Street Racing @ 15 when you either Got a Bigger/Softer Tire or learned how to Feather the Throttle and learned shift points by knowing your Camshaft Profile/Torque Curve/Final Gear Ratio/Tire size to launch as hard/quickly as you could. None of today's cheating using..... an ECU during WOT to electronically adjust Timing/AF Mixture and Electronic Feathering the Throttle all simultaneously..lol

I've designed and worked on many a Chevrolet Race Engines/Transmissions and Chassis, Off-Road Vehicles, UTVs, Consulted on Aviation Power Systems, Aviation and Ground Based Communications Systems- and have still have an active EMT License @ >60 years young.

NEVER STOP LEARNING.

I'm no expert but I'm still always eager to share what I do know and learn new things along the way.

Click to expand...

bebsy said:

Well here's a well thought out explanation one of which I've never been in the habit of. I only fitted the engine 2 day's ago and secured the engine mounts unfortunately I decided to leave the starter off untill I rerouted the wiring, but hey it's no big deal engine is still on the jack and hoist in place I'll get the stator casing off in a jiff, I now know I need an M10 helicoil with a 1.0 pitch... May a great day be had by all

Click to expand...

TURBO200R4 said:

The proper way to fix this problem

This info is wrong
Earlier I typed about 3 paragraphs and managed to lose it all but having the motor out is a plus
You will be using the m8x1.25 helicoil set I will get you the part number tomorrow.

Click to expand...

TURBO200R4 said:

Metric helicoils is harder to install than stander threads
A few pointers
Do not drill all the way thru the case. It should go easy at first then I can tell when the drill bottoms in the hole but you can also visually check

Hth

Click to expand...

DesertRat said:

1) I usually measure the depth of the hole then: 2) Transfer that measurement to a drill bit and; 3) Mark the length/depth on drill bit with Black Electrical Tap.

That way I do go passed and through the bottom of the hole.

Btw, Turbo, Would a Bottoming Tap or a Plug Chamfer Tap be another Tap option? Just a Thought?

Plug Chamfer—Our go-to chamfer type, these thread both through holes and blind holes. The tapered section is shorter than a taper chamfer and longer than bottoming chamfer. As a result, they're easier to turn than bottoming taps but require more force than taper taps.—Our go-to chamfer type, these thread both through holes and blind holes. The tapered section is shorter than a taper chamfer and longer than bottoming chamfer. As a result, they're easier to turn than bottoming taps but require more force than taper taps.


MaMaster Carr Taps
McMasters-Carr is my Go-To for Tooling, Fasteners and other hard to find Machine-type Tooling etc. They can also ship overnight out when needed.

Click to expand...

TURBO200R4 said:

Metric helicoils is harder to install than stander threads
A few pointers
I would would have the one insta
Put two bolts (closest to the one you will be working on) in and that will give you a visual way to keep your drill aligned while drilling
Do not drill all the way thru the case. It should go easy at first then I can tell when the drill bottoms in the hole but you can also visually check
These helicoils are made for tapping all the way threw so considering what is at stake I would tap it to the bottom then grind of 1/16 of the tap so you can get an extra turn when inserting the helicoil.
What you don't want to do is force that coil into the area that is not thread.
When in doubt I have taken a die grinder an cut a one coil off that is sticking out metric helicoils is harder to start requiring more pressure to start.
I would have the one installing the coil read this because it is going to be easy to mess up that motor.
Any questions just sing out
Hth

Click to expand...