Detroit heat exchanger tank fill neck

[Triskele]

Fill neck on the Detroit heat exchanger tank broke off. Any suggestions on how I should go about removing the broken neck and installing the new one. Has anyone run across this before and replaced one of these. Is it pressed in? Is any sealant needed to keep it in place once pressed in?

 

[Captain Ralph]

These are pressed in. Pull the old one out with some B A pliers. Do not scratch the casting. Clean up the cast with a scotch pad.
Press in the new one with some loc-tite sealant.
Use a matched sized socket to press/tap in the new one fresh from the freezer.

 

[rwaldrop13]

These are pressed in. Pull the old one out with some B A pliers. Do not scratch the casting. Clean up the cast with a scotch pad.
Press in the new one with some loc-tite sealant.
Use a matched sized socket to press/tap in the new one fresh from the freezer.

If you don't have a matched socket you may need to go look for a wooden dowel you can cut down. It should fit snug, not tight - again, the fill neck fresh from the freezer.

 

[Triskele]

Thank you for the advise. Forgot about the freezer tip. Good idea!!

 

[rwaldrop13]

Post updates! I learn something new every time Ralph weighs in on one of these conundrums!

 

[bostonhatteras]

along the lines of freezing the cap neck, you may want to also heat/warm the cast tank opening with a heat gun especially if its cold where you are. Thats the way ive done bearings on armatures for a couple bench grinders i restored, heat the bearing on a incandescent light bulb and cool the armature in the freezer. the bearings slipped on with no resistance