New to me '56 420c R&R and Grill Guard Removal

[outbackrider]

Hello,
I've been a long time follower of this site, finally came across a '56 420c that was in my price range, that I picked up and just began to work on.

The engine runs, I'm working the bugs out, carb rebuild, new points, condensor, wires, fluid change, got to clean out the gas tank, fuel strainer, etc. Need to cork bush the throttle lever as it won't stay in position. Both steering clutches are stuck, so that will be some work. Undercarriage is usable, bushings are not worn through, as a hobby dozer, it should last me for some time.

My question is I want to remove the grill guard, it has 3 of the 4 bolts in the lower bolster position that hold the guard.

I've sprayed pb blaster on them, but don't want to crack the cast bolster.
What is the best/cautious way to remove the bolts?

Appreciate this site, look forward to sharing my progress.

Thanks.
Gary

[gregjo1948]

Put some heat on them and use an impact gun.

[outbackrider]

Gregjo,
Thanks for the reply. Direct heat onto bolt heads or to cast bolster?

[gregjo1948]

Gregjo,
Thanks for the reply. Direct heat onto bolt heads or to cast bolster?

Heat around the outside of the bolt as best you can. If you heat the head you'll probably twist it off. The heat will expand the metal, making the bolt turn easier. The jolting that the impact wrench/gun makes will loosen it without breaking it as quickly as steady twist of a wrench.

[outbackrider]

Heated the bolster like you advised, worked well. I have one old broken bolt
that was broken off years ago. I drilled a small hole into and through it, will mig a nut on later this week. Got PB Blaster working the threads. from the inside out.
Thanks again.