Snapped bolt water pump 98 C280 V6 ….part 2 (language got worse)

[DVA1]

Everything here depends on your personal experience and skill when it come to 'Helicoil' thread repair (Helicoil in inverted commas because it is a brand name , like Hoover') .

I (myself) would have a go at it at home having spent years drilling , tapping and 'Helicoiling' (is that a word ?) stuff , but I can well understand if someone else would be less keen to take the plunge.

Drill size to tap M6 is 5.25 and for a Helicoli the drill has to be 6.3 then the Helicoil tap cuts slightly wider. Based on your photo you may run out of meat where the rubber gasket seal is on the casting.

Access could be an issue to actually get the thread insert tool in there to wind the new thread in. a 90' battery drill might be required , I can't tell from this photo.

It's a pain in the A$$ , but defiantly repairable.

Access isn’t an issue however the option the Kenny offered seems to be the way to go. My only concern with using an alloy filler in the hole is the concentrated heat. I’ve tried looking to see what’s behind the case and whether it will distort or if there’s anything that will melt. The current hole is now slightly off centre and has been drilled out at 5.5mm which is why when I tapped it out the M6 bolt was loose.

I may have a go at “Helicoiling” on some scrap metal while I wait.
cheers

 

[KennyN]

My only concern with using an alloy filler in the hole is the concentrated heat.

You can get "tap-able" two part fillers for alloy (JB Weld etc) , clean and degrease the area / mix the compounds / fill and level the hole ready to be drilled + tapped.

No need for Tig welding etc. and the local heat it generates.

The bigger the hole to fill the better for adhesion for the filler.

K

 

[DVA1]

You can get "tap-able" two part fillers for alloy (JB Weld etc) , clean and degrease the area / mix the compounds / fill and level the hole ready to be drilled + tapped.

No need for Tig welding etc. and the local heat it generates.

The bigger the hole to fill the better for adhesion for the filler.

K

Pretty sure I’ve got some JB Weld lying around somewhere

 

[KennyN]

Back at work now DVA1 , any further forward with the info regarding the required bushing sizes ?

K

 

[DVA1]

Back at work now DVA1 , any further forward with the info regarding the required bushing sizes ?

K

Hi Kenny, thanks for getting back to me

Hope these measurements are ok

 

[KennyN]

Hi Kenny, thanks for getting back to me

Hope these measurements are ok

Perfect , will get on the bushes today and they should be in the post along with drills + taps no later than Saturday.

Give me a call at work over the next two days to give me your delivery details - --------(write this number down as i will delete it in the next half hour)

K

 

[DVA1]

Perfect , will get on the bushes today and they should be in the post along with drills + taps no later than Saturday.

Give me a call at work over the next two days to give me your delivery details - --------(write this number down as i will delete it in the next half hour)

K

Got it, thank you

 

[KennyN]

Got it, thank you

If you dont get me straight away , i maybe out in the plant (or making your bushes) so try a couple of times.

K

 

[KennyN]

Here you go , will be in the post later today.

3mm bush and drill for the pilot and 5mm for tapping M6.

As the pump is quite thick it maybe an idea to use the old one as a guide when tapping , that way it will go in straight.



K

 

[DVA1]

Here you go , will be in the post later today.

3mm bush and drill for the pilot and 5mm for tapping M6.

As the pump is quite thick it maybe an idea to use the old one as a guide when tapping , that way it will go in straight.



K

Thank you very much, hopefully the old girl will be back on the road next week.