Any one ever come up with a solid water heater valve? They all seem to leak after a few years.

Is the dealer one well made these days? I do not
Mind paying more for quality especially critical part like this.
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Paul NW Indiana '90 745 turbo 145 K

1989 Volvo 740 Turbo Wagon fuel tank capacity ????

60 litres
=13.198 Imp gals
=15.8502 US gals
=enough to get you at least 300 miles as long as your engine is running half-decent, over 500 miles on a good day if you keep it well maintained
And exactly how does this relate to water heater valves? ;)
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Dave -still with 940's, prev 740/240/140/120 You'd think I'd have learned by now

my 89-745 got 34 Mpg on highway...My 93 940 wont get better than 22 mpg cant figure it out!!

Maybe it’s the water heater valve, the topic you’ve posted on ?

The 700/900 heater valve p/n 9447896 does appear to be no longer listed by Volvo dealer parts suppliers, but the final revision of that part being sold under the Genuine Volvo name and of a slightly more rugged design than the original is identical to one still being distributed by Professional Parts Sweden (ProParts) under their own and a number of other brand names. As just one example, ref. www.fcpeuro.com/products/volvo-heater-valve/740/940 I see an identical looking one available directly from Asia through Aliexpress for under $10, but it may take a while to get to you.

I've used that newer design valve on a number of occasions and have had absolutely no issues with it being up to the job. If anything it's even sturdier than the original design where the necks eventually get brittle and break off. The vacuum hose fitting on the newer design is a slightly different diameter and orientation. A different diameter rubber connector sleeve needs to be used. There is a little Volvo elbow adapter hose being sold, but I've found it was the incorrect diameter, leastwise for the ProParts valve. I've found the original rubber sleeve can still be used if you simply turn it around, push the vacuum hose in all the way and perhaps use a bit of RTV sealant to make sure it stays in place, being careful of course to make sure none gets into the vacuum tube. The newer design also requires the vacuum hose to be bent rather sharply. Slipping the vacuum hose through a short length of rubber or vinyl tubing as a protective sleeve can help prevent the vacuum hose from kinking at the sharper turn.

Other designs being sold by aftermarket suppliers such as those under the Dayco brand I can't say as I would trust so much. I've also used ones sold under the MTC brand name (IPD carried them, still 6 in stock) that are identical to the original Volvo design, but I've found they don't last any longer than the original Volvo ones, and in one case a lot less (although that was in part due to excessive cooling system pressure from a head gasket leak, still it was the MTC heater valve that was the weakest link in the chain). The one currently being sold under the MTC brand name looks the same as the ProParts one.

For additional information and a slightly humorous take on the issue, refer to this old brickboard post Revenge of the 940 -Heater valve and heater hose
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Dave -still with 940's, prev 740/240/140/120 You'd think I'd have learned by now

I found a Volvo dealer that had a stash of them. I will swap it out and keep the cheap on as an emergency part.
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Paul NW Indiana '90 745 turbo 145 K

Dealer is no longer an option.

Part is discontinued by Volvo.
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Paul NW Indiana '90 745 turbo 145 K

I use Ford (motorcraft) YG-136 valve...all metal. Check ebay, O"reilys , similar

Looks like the old Volvo style.

O’Reilly’s says it will not fit a 1990 740. I assume if fit fine on yours.

I got the cheap Murray one from them to get back on the road. I will swap it out with this style.
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Paul NW Indiana '90 745 turbo 145 K

Yes it did fit on my 740. In fact in the FAQs of the 700 /900, mention was made of this valve as an alternate.