Tool Wanted Head clearance tool

[NAMBA860]

I believe Terry Keeley made some little gauges that slipped through the glow plug hole to check the head clearance. Does anyone have this tool they would part with?

 

[Kristy Wallace]

I believe Terry Keeley made some little gauges that slipped through the glow plug hole to check the head clearance. Does anyone have this tool they would part with?

Old school .Use Solder .or use dial callipers

Or,

Contact Daniel place and see if he has any dial gauges in stock. Look up the manufacturer page he will be there .

 

[FloridaScaleBoater]

Plasti guage..
Amazon

 

[Davidkrienke]

I second the solder and dial calipers. Always works for me . I usually just feel along the smashed out solder with the calipers and find the thinnest reading and that is where the squish is at.

 

[Roxyflash]

You can also use a depth micrometer bolt liner down on a couple screw holes bring piston up to top dead center measure then flip the head button measure the step then subtract the two numbers

 

[Dave Gilles]

there's a huge discrepancy between my squish gauge and solder. like over .005"

 

[NAMBA860]

there's a huge discrepancy between my squish gauge and solder. like over .005"

That’s kind of what I was seeing myself last night it doesn’t seem to be super accurate

 

[Jeff Barnes]

I have gauge from speedmaster works great and not that pricey

 

[Danny King]

I would not use solder. Especially if you’re running tight clearances. Either measure it out or get a clearance tool.
If you’re running .010 or lower it is very important to be accurate.

 

[Alan Elzer]

Solder for me, used it for many years. Get the solid type 0.030 diameter.

 

[dave roach]

Depth mic works for me for 39 years.

 

[Dave Gilles]

just throwing it out there that you can use the backside of a caliper to take depth measurements.

 

[Timbo Whalen]

Depth micrometer easiest, most accurate method for setting clearance. Highly repeatable, measure deck height at TDC, measure button from touch-down surface to squish band, subtract difference....usually a negative (interference) sum, determine shim thickness needed for desired clearance.
Using used shims (pre compressed) a smidge more accurate, by maybe a couple of 1/10000"....not a big deal.

This isn't rocket science.

 

[Davidkrienke]

Depth micrometer easiest, most accurate method for setting clearance. Highly repeatable, measure deck height at TDC, measure button from touch-down surface to squish band, subtract difference....usually a negative (interference) sum, determine shim thickness needed for desired clearance.
Using used shims (pre compressed) a smidge more accurate, by maybe a couple of 1/10000"....not a big deal.

This isn't rocket science.

When I use the rod in the caliper to do that though I always wonder if I am perfectly flat when I push down and so I do check that way too but I confirm with 30 thou solder and sometimes I even rotate it a couple times over on the same solder and it seems to just smash to what it can smash too. I guess I really just don't think to much on it anymore just get er done and go running.

 

[RaceMechaniX]

This is just a decent caliper with a base attachment. 3D printed stand to hold the motor vertical.

 

[Timbo Whalen]

This just a decent caliper with a base attachment.

View attachment 330441

Yeah, that base is the key.

 

[RaceMechaniX]

This one is almost up to TK standards.
Mitutoyo digital indicator on a 3D printed base that holds the sleeve down. I made specific ones for each motor, i.e. 91/101RS, 67/80hr, K-45, etc.

 

[RaceMechaniX]

Yeah, that base is the key.

Money well spent: https://www.mcmaster.com/2325A45/

 

[NAMBA860]

there's a huge discrepancy between my squish gauge and solder. like over .005"

That’s kind of what I was seeing myself last night it doesn’t seem to be super accurate

 

[NAMBA860]

The head button surface seems to be angled not flat as well. I have no problem on the cylinder side with a regular caliper, it’s the head button side.