TD5 oil drain plug thread

[Bigbjorn]

Cheers for that Scott, but the damage means I'm going to be drilling and tapping ... and definitely with a larger pitch so it doesn't happen again

That shoulder on the sump is a pain in the backside though so I'll be looking for an allen head bolt to suit.

If your measurement of 15.7 is correct then your options are to use M18 x 1.5, tap drill 16.5mm; or, use M18 x 2.0, tap drill 16.0mm. I would prefer to stay with the finer pitch.

[reeksyofoz]

If your measurement of 15.7 is correct then your options are to use M18 x 1.5, tap drill 16.5mm; or, use M18 x 2.0, tap drill 16.0mm. I would prefer to stay with the finer pitch.

Yes, that's what I'd worked out, but decided to go for the coarser pitch for a meatier thread... and possibly mill a groove on the bolt for an o-ring.

[Tombie]

Yes, that's what I'd worked out, but decided to go for the coarser pitch for a meatier thread... and possibly mill a groove on the bolt for an o-ring.

Finer thread is better if your not heavy handed doing it up

Course pitch will stress the alloy more and more likely to loosen up...

Listen the Brian!

[Tombie]

Yes, that's what I'd worked out, but decided to go for the coarser pitch for a meatier thread... and possibly mill a groove on the bolt for an o-ring.

Just replace the copper washer with a Bonded Washer (also known by brand name "Dowty Washer")

[reeksyofoz]

Turned out that I could only get an M18 X 1.5 anyway

[fraser130]

I STILL haven't fitted mine, as I'm waiting for my next oil change!
And Scott is correct, the extension is WAY too long to be of any use..
I might get back to the manufacturer and see if I can get my hands on a valve that hasn't been threaded yet, and if there is enough "meat" on it, get a mate to cut the right thread and shoulder on it, then send Jack a drawing of it so he can offer them specifically for Td5's.
.....one day when I have time!

Fraser