Freeze plugs
 

Hi everyone. On a `81 n/a d24 engine there was a vw block heater in 4th hole (manifolds` side) that has been removed, i think.

Where to find the proper freeze plugs for the d24 and d24t engines?
(Are they using the same part? same size?)

I will measure the diameter, but;
one more thing (if you have/had one out): How thick are they? Please confirm about the sizes.

expansion plug
 

Looks like I found it but not yet sure about the fitment. It is listed as 1983 volvo 760 td.
http://www.oreillyauto.com/site/c/de...2267&ppt=C0367

and

http://www.clarksdiscount.com/produc...ock+Parts).htm

Yes the 36.5mm is the correct size for the block.