Cylinder head freeze plug size

5ft24 · Post by **5ft24** » 29 Oct 2015, 10:47

Anybody rebuilt a B239ft head from a 90 740 turbo know the size of the little freeze plug below cylinder 1's intake port? Mine started leaking, and 3 different parts blow ups from 3 different Volvo OEM parts sites show 3 different sizes... Ranging from 17.5mm to 25mm...

5ft24 · Post by **5ft24** » 29 Oct 2015, 10:48

B230FT

93Regina · Post by **93Regina** » 29 Oct 2015, 11:16

5ft24 wrote:size of the little freeze plug below cylinder 1's intake port?

There are a total of five different sizes: see items 14, 15, & 16 here. The two items listed below with the extra number represents over-sized caps.

946778

946779; 955086

946780:955088

5ft24 · Post by **5ft24** » 29 Oct 2015, 11:46

I went ahead and picked up the 17.5 and the 21mm
Going to change it Sat. Right now it was cleaned really well and JB water weld put in the plug cup to seal it up so I could get back and forth to work. The others look too big for the hole, but NAPA here has them all just in case.

5ft24 · Post by **5ft24** » 02 Nov 2015, 20:20

21mm it was!