Need advice on spark plug repair kit to buy?

[twinstaged]

Yeah could trim 10-15mm off for clearance

 

[Lone Wolf]

I've got a homemade plug that I use, to line up in the mill i screw my plug in the cylinder. I then indicate two sides up and down. It's about 4" long once screwed into the cylinder. It will get you dead nuts close.

Fixing to threadsert a 660 cylinder.

Well you have more room than I do .

 

[Lone Wolf]

Yeah could trim 10-15mm off for clearance[/QUOTE

Yeah could trim 10-15mm off for clearance

Ruin a perfectly good tool ,lets look for a tap first.

 

[Lone Wolf]

I have a junk cyl here for practice I could send with the good one.

 

[twinstaged]

Yeah just buy one the oem branded cheapie kits and make it work and keep it in the toolbox for a rainy day

 

[Lone Wolf]

Yeah just buy one the oem branded cheapie kits and make it work and keep it in the toolbox for a rainy day View attachment 83119

Every day is a rainey day at the Wolfs den I fix dozens of these.

 

[twinstaged]

I have a junk cyl here for practice I could send with the good one.

Either way really. Shouldn't be a hard job to knock out. Any of the other guys that commented sound like they could getter done too. Can you post a picture of the cylinder to see how buggered up it is?

 

[Lone Wolf]

Matt can you measure that one and post a pic?

 

[Mattyo]

Looks like the same kit to me

 

[Lone Wolf]

Either way really. Shouldn't be a hard job to knock out. Any of the other guys that commented sound like they could getter done too. Can you post a picture of the cylinder to see how buggered up it is?

I can in a bit.

 

[Lone Wolf]

Looks like the same kit to me

Then how the hell are you getting that far? Maybe this is tweeked.

 

[Mattyo]

It was a minor amount of dremel to get the roof out of the way. ...probably would have been ok even without doing that. But then again...my threads weren't buggard at all. So it kept it perfectly straight

 

[Lone Wolf]

Either way really. Shouldn't be a hard job to knock out. Any of the other guys that commented sound like they could getter done too. Can you post a picture of the cylinder to see how buggered up it is?

 

[Lone Wolf]

 

[Mattyo]

Inside. ...with the tap?

 

[Lone Wolf]

There is enough metal left to tap , the threads at the bottom are 14mm

 

[woodtool89]

looks like you already have a kit and a plan, but just for future reference for anyone reading this...ive made my own sleeves before... solid aluminum threaded for NPT then drill/tap head for same size NPT, then mill flush, then drill/tap for spark plug (this can be done before installing the sleeve if theres clearance issues like the op's...
heres some pics of one I did for 18mm plug holes, I believe I used 3/4" NPT for insert size...

 

[Mattyo]

Nice....4 sure the key there is clamping it down to the bridgeport

 

[woodtool89]

looks like you already have a kit and a plan, but just for future reference for anyone reading this...ive made my own sleeves before... solid aluminum threaded for NPT then drill/tap head for same size NPT, then mill flush, then drill/tap for spark plug (this can be done before installing the sleeve if theres clearance issues like the op's...
heres some pics of one I did for 18mm plug holes, I believe I used 3/4" NPT for insert size...
View attachment 83126 View attachment 83127 View attachment 83128 View attachment 83129

BTW those had a healthy amount of Loctite 272 on the pipe thread portion of the insert

 

[Lone Wolf]

Inside. ...with the tap?

Yup I ain't thinking i should grind in there.