Dodgy thermostat

[maxfax]

Pretty sure both my 91 na and 91 td both have aluminum thermo housings as well.. Seems a lot of vw stuff is inconclusive. Lmao

Stuff gets swapped around a lot is probably the best explanation..   I have an '83 that some dumbass swapped the plastic housings onto...

[R.O.R-2.0]

Pretty sure both my 91 na and 91 td both have aluminum thermo housings as well.. Seems a lot of vw stuff is inconclusive. Lmao

not from the factory they didnt..

[mtrans]

Orig Tstat is best,but after 19 year and two NEW ones, I try drive without and my temp can`t pass 60 c.
With new(after that 2) I get fast 80 c ,but not mach going in past 90 c, for my needs I like this.
ps. Talking about temp I mesured disel return on 20 c out side,fan do more than ones -and it`s 60 c belive or not

[rodpaslow]

ROR'S correct in CAN at least, everything past 86 got plastic stuff where-ever they could put it.  I think the deisels didn't get them till 88'.  I have a 90 jetta that has all the plastic crap.  Whenever I can find aluminum water fittings I change them and throw the plastic away.  My .02$  My Mk3 has plastic thermostat housing below water pump, but no option to change that one!