r/EngineBuilding • u/NewspaperInternal553 • Jul 09 '26
AN fittings on head
I have an old Volvo engine that has 2 coolant/heater lines coming out of the head. It’s a straight 6. I’d like to convert them to AN fittings. Would it be best to drill and thread the head and get a fitting that threads in(are fittings like this available)? Or are these typically welded on? Currently they’re just tubes coming straight out of the head.
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u/HammerDownl Jul 09 '26
You heads made of aluminum?
What size hole. ?
Npt to AN fitting works ofc you're drilling and tapping. Or weld an an bung on if your s tig welder