Making an adapter for Dial Indicator from Spark Plug

SeaKaye12

SeaKaye12

Lieutenant Junior Grade
Joined
Jul 3, 2005
Messages
1,107
Sheesh...I know this must have been explained dozens of times...but a search is not giving friendly results right now....

I want to take a spark plug and drill it out to create an adapter for a cheap TDC Dial Indicator.

Porcelain is a challenge to drill through.

What sort of drill do I need?

Is this worth it? Can I but one cheap somewhere? The cheapest that I've found is this one:
http://www.micro-touch.com/html/tdc_dial.html

Hopefully one of you can walk me through the drilling procedure ?

Thanks, Chuck
 
A

AlTn

Commander
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Mar 9, 2010
Messages
2,813
Re: Making an adapter for Dial Indicator from Spark Plug

Chuck...google..Pete's RD 400 blog homemade 2 stroke timing kit..I think that's what you saw
 
SeaKaye12

SeaKaye12

Lieutenant Junior Grade
Joined
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Messages
1,107
Re: Making an adapter for Dial Indicator from Spark Plug

That's step by step alright....I'd never seen that page but thanks for the reference to it.

Now I can go to Harbor Freight and get a cheap (lets hope it's just inexpensive...but I imagine it will be **CHEAP**) dial indicator. For some reason the really cheap ones don't seem to come with the spark plug adapter...but now I'm all set with my home-made one.

Thanks so much for the reference!

Chuck
 
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Craig-

Petty Officer 1st Class
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Jul 25, 2010
Messages
316
Re: Making an adapter for Dial Indicator from Spark Plug

A pencil will find TDC with no more disparity than the timing pointer is accurate.
 
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wilde1j

Vice Admiral
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Apr 15, 2002
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5,964
Re: Making an adapter for Dial Indicator from Spark Plug

A machinist supply house should have spark plug adapters for < $10. I bought several a few years ago in NJ.
 
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