Splash apron hole size

CWPASADENA

CWPASADENA

Well-known member
I am putting together a 31 and adding side mounted spare tires.


What is the size of the hole in the splash apron for the side mount arm?


I have pilot holes drilled that line up with the brackets on the frame.


I think it may be 1 1/2 inches but want to be sure before I enlarge the pilot holes to the final size.


Thanks in advance.


Chris W.
 
Do you have the "donut gasket" (anti-rattle) where the arm comes through the splash shield?

A good plan would be to make the hole large enough to pass the gasket through and allow the gasket to seat on its groove.

You want a little compression in fit - maybe such that the tapered arm can be passed through the hole but everything is "snug."

Plumbers taper reamers (used for de-burring pipe) work good for this. Be sure to do both sides and follow up with fine sandpaper lest you make a sharp edge which cuts the seal rubber.

Joe K
 
Looks like you are going the right way .The trick is getting in exactly the right spot
There are tips to it including a centering method off the tire mount for 3031
 
I have it centered. I have the hole just large enough for the iron now.


I do not have a grommet at this time and wanted to get the all the aprons and fenders ready for final paint and wanted to finish the hole before I painted everything.


If I had a grommet, I could measure the OD of the grove.


I just did not want to make the hole too large.


Thanks to everyone for your comments.


Chris W.
 
Otis anhard hole to drill due to the curvature of the area
Start out smaller and use a die grinder to finish size
The contour will cause a hole saw to wander a little
 
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