Miata Turbo Forum - Boost cars, acquire cats. - Surprise! Coolant in the bellhousing

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.one lane

12-27-2016 12:36 PM

Surprise! Coolant in the bellhousing

1 Attachment(s)

Hey guys,

Quick question, what is the size of the freeze plug in the back of the block? Bought a 30mm freeze plug (same as the old one) and it slides right in without any interference? I don't think that's right?

sixshooter

12-27-2016 03:02 PM

It's supposed to be a tight fit requiring being tapped in gently with a mallet.

huesmann

12-27-2016 03:48 PM

Did you measure the hole and the new plug with calipers?

.one lane

12-27-2016 04:32 PM

Measured the new plug and it was slightly undersized ~29.5-29.7mm. The hole ran around ~30.0 -30.3mm. Ordered a 30.5mm. Hopefully, that works.

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