JETaah
Vendor , w/Business number
Cleaning out the EGR cooler is part of the manifold cleaning process for me.
I never bother to pull the cooler off and try to soak it
I use a 3/16" X 12" drill bit in the old DeWalt and round off of the corners so as not to dig into the heater exchanger tubes. Nibble at it ...1/4"-1/2" stroke clearing the crud from the hole often while keeping the drill aligned with the tubes and only the tubes that can be accessed straight-on. That amounts to may 8 or 9 tubes. It is enough to satisfy the EGR's requirements.
Don't try to bend the drill and don't force it! Let the drill draw out the carbon. If you push hard it will pack the carbon and make it all the harder to bore through.
There are these:
https://www.mcmaster.com/#long-length-drill-bits/=17jc92k
a little pricey ($25) but designed for the "chip" removal.
or these:
https://www.mcmaster.com/#long-length-drill-bits/=17jc8al
about $16 for 3/16"X12"L and suit the purpose for me
I never bother to pull the cooler off and try to soak it
I use a 3/16" X 12" drill bit in the old DeWalt and round off of the corners so as not to dig into the heater exchanger tubes. Nibble at it ...1/4"-1/2" stroke clearing the crud from the hole often while keeping the drill aligned with the tubes and only the tubes that can be accessed straight-on. That amounts to may 8 or 9 tubes. It is enough to satisfy the EGR's requirements.
Don't try to bend the drill and don't force it! Let the drill draw out the carbon. If you push hard it will pack the carbon and make it all the harder to bore through.
There are these:
https://www.mcmaster.com/#long-length-drill-bits/=17jc92k
a little pricey ($25) but designed for the "chip" removal.
or these:
https://www.mcmaster.com/#long-length-drill-bits/=17jc8al
about $16 for 3/16"X12"L and suit the purpose for me
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