pollyp
Club Member
3D printed some plastic vice jaws for clamping the AN fittings without scratching em
also printed some plastic adapters for the spanners
exhaust gaskets arrived
to remove the old fitting I carefully grinded through the welds
grinded the sump smooth, noticed that the previous oil leak at the top of fitting could be due to this stress fatigue crack that's developed from a poorly drilled serrated hole
new fitting sits nice against the hole
calibrating the appropriate weld setting. the sump measured 1.5mm thick while this piece was only 1mm.
I wanted to weld the fitting in one continuous pass to reduce gap leaks but would easily blow through without support. so I clamped this piece of copper/alu plate behind to acts as a mould & heatsink and can weld however long I like no problem
the plate simply supports the molten pool preventing gravity from pulling the blob through
trial run continuous weld with copper back plate on the old fitting and it works gr8. I need a better weld lens cos it's so dimmed I can't see where to weld
clamped the new fitting in place
with the copper back plate behind to prevent blow through
tacked
after tacking, used this rod to keep the back plate on and allow unobstructed room for the welder to go all around the fitting in one go
made two weld passes all around. need more practice getting comfy cos trying to move this bulky stiff MIG gun around a fitting without binding/jamming/knocking is hard and the dark tint doesn't help visibility
good penetration. hmm I'm thinking of also welding this inside gap to further seal it for good.
just needs a lick of paint now
also printed some plastic adapters for the spanners
exhaust gaskets arrived
to remove the old fitting I carefully grinded through the welds
grinded the sump smooth, noticed that the previous oil leak at the top of fitting could be due to this stress fatigue crack that's developed from a poorly drilled serrated hole
new fitting sits nice against the hole
calibrating the appropriate weld setting. the sump measured 1.5mm thick while this piece was only 1mm.
I wanted to weld the fitting in one continuous pass to reduce gap leaks but would easily blow through without support. so I clamped this piece of copper/alu plate behind to acts as a mould & heatsink and can weld however long I like no problem
the plate simply supports the molten pool preventing gravity from pulling the blob through
trial run continuous weld with copper back plate on the old fitting and it works gr8. I need a better weld lens cos it's so dimmed I can't see where to weld
clamped the new fitting in place
with the copper back plate behind to prevent blow through
tacked
after tacking, used this rod to keep the back plate on and allow unobstructed room for the welder to go all around the fitting in one go
made two weld passes all around. need more practice getting comfy cos trying to move this bulky stiff MIG gun around a fitting without binding/jamming/knocking is hard and the dark tint doesn't help visibility
good penetration. hmm I'm thinking of also welding this inside gap to further seal it for good.
just needs a lick of paint now