Jon J 1250 Posted September 27, 2022 Report Share Posted September 27, 2022 Hi, Does anyone know what size and thread type the hole is in the pre 1966 Herald thermostat Housing / Elbow. The plug that I need isn't listed as a separate item in the Stanpart parts manual Kind Regards Jon Link to comment Share on other sites More sharing options...
Pete Lewis Posted September 27, 2022 Report Share Posted September 27, 2022 they were gerenaly a std 5/8" x 18tpi unf thread Pete Link to comment Share on other sites More sharing options...
Jon J 1250 Posted September 27, 2022 Author Report Share Posted September 27, 2022 Thanks Pete, Mine used to have a temp sender in it and I want to keep my car original so I have to find a brass plug for it. I'm hopeful you can still buy them somewhere. Jon Link to comment Share on other sites More sharing options...
Pete Lewis Posted September 27, 2022 Report Share Posted September 27, 2022 if stuck for supply just why not use an old temp sender ??? or eg (1) 5/8 x 18 unf plug - Bing images think the std sump plug is 5/8" ??? Pete 1 Link to comment Share on other sites More sharing options...
Colin Lindsay Posted September 27, 2022 Report Share Posted September 27, 2022 20 minutes ago, Jon J 1250 said: Thanks Pete, Mine used to have a temp sender in it and I want to keep my car original so I have to find a brass plug for it. I'm hopeful you can still buy them somewhere. Jon Not sure about any brass plugs available but the plug from the waterpump housing is the same size (obviously!) so if you can find one of those or remove one from an old housing, it will blank the thermostat housing. 1 Link to comment Share on other sites More sharing options...
Jon J 1250 Posted September 27, 2022 Author Report Share Posted September 27, 2022 1 hour ago, Colin Lindsay said: Not sure about any brass plugs available but the plug from the waterpump housing is the same size (obviously!) so if you can find one of those or remove one from an old housing, it will blank the thermostat housing. Thanks Colin, Assumed the original Triumph plugs were brass because my temp sender gland was, due you know if they were brass or steel. Do you mean the plug on the side of the water pump like the one I have shown below. Looks like a steel plug, and a bit bigger than the one on the thermostat housing. I'll see what I can find amongst my old spares, definitely have an old water pump housing from a Mk3 spit engine somewhere. Jon Link to comment Share on other sites More sharing options...
Pete Lewis Posted September 27, 2022 Report Share Posted September 27, 2022 yes all those are the same thread Pete 1 Link to comment Share on other sites More sharing options...
Jon J 1250 Posted September 27, 2022 Author Report Share Posted September 27, 2022 So just thinking, I have this Moss dual temp/oil pressure gauge to go in to a nos vintage centre pod. It has quite a long bulb and a 5/8" male thread gland fitting, so if I remove the plug from the side of the water pump housing (probably easier said than done) and relocate it on the top of thermostat housing. I can then screw the new temp sender in to the side of the water pump without needing to worry about the length of the bulb, and presumably will need one of these 5/8" male to 5/8" female fitting to make the seal on the bulb taper.? https://www.holden.co.uk/p/adaptor_5_8_in_unf_for_water_temperature_sender_070_017 Link to comment Share on other sites More sharing options...
Colin Lindsay Posted September 27, 2022 Report Share Posted September 27, 2022 This is the way the standard sensor fits: There certainly looks to be enough room across that housing, provided you can make yours seal. 1 Link to comment Share on other sites More sharing options...
Jon J 1250 Posted September 27, 2022 Author Report Share Posted September 27, 2022 8 minutes ago, Colin Lindsay said: This is the way the standard sensor fits: There certainly looks to be enough room across that housing, provided you can make yours seal. Thanks Colin, Looks like yours is fitted to the rearmost tapping on the side of the water pump housing, mine does not have one, only the front one which looks like in your photo has a twin carb inlet manifold water feed attached. Presumably both tappings are 5/8"? Regards Jon Link to comment Share on other sites More sharing options...
Colin Lindsay Posted September 27, 2022 Report Share Posted September 27, 2022 Both the same thread and size; this is the 13/60 which has the water hose connected to the other tapping. I replaced it with a late 1200 housing on the other car and just removed the blanking plug - it had two as well. They're both in the same place, and level, so where it fits on one side should mirror the other; hence your single tapping housing should be fine, too. 1 Link to comment Share on other sites More sharing options...
Pete Lewis Posted September 28, 2022 Report Share Posted September 28, 2022 yes you will need an adaptor to seat the bulb and take care the longer bulb does not interfere with the thermostat internals i have aselection of that type but never needed to install any just used as a temperature checker one is a twin unit used on testing truck for top and bottom radiator tank temperatures ..so it sits in the cupboard of bits and peices Pete Link to comment Share on other sites More sharing options...
NonMember Posted September 28, 2022 Report Share Posted September 28, 2022 My Vitesse used to have one of those twin gauges. The temperature bulb adapter wouldn't seal in the pump housing, and attempting to tighten it cracked the casting. Attempting to remove it, for transfer to a replacement housing, revealed that the bulb was rusted solid into the adapter, and turning it broke the capilliary. I now have a standard electrical temperature gauge. Link to comment Share on other sites More sharing options...
Jon J 1250 Posted May 17, 2023 Author Report Share Posted May 17, 2023 At last! Finally got my fittings sorted out for the dual gauge with capillary bulb sender. This NOS MK1 spitfire housing came up for sale so bought that and this means I can get the sender bulb in without spacing it out to avoid the thermostat as would be required with the top entry housing. The fitting is a 5/8" UNF parallel thread in case anyone needs to know in future. The capillary bulb has a 5/8 UNF male backnut (note some have female threads) which will seal the bulb by compression into this fitting once done up. JJ Link to comment Share on other sites More sharing options...
Puglet1 Posted May 17, 2023 Report Share Posted May 17, 2023 Nice one ! 1 Link to comment Share on other sites More sharing options...
Colin Lindsay Posted May 17, 2023 Report Share Posted May 17, 2023 Looks good; always great when a solution appears! 1 Link to comment Share on other sites More sharing options...
Jon J 1250 Posted May 17, 2023 Author Report Share Posted May 17, 2023 (edited) Thanks Colin, absolutely. Got straight on with fitting it after work, just to the old gauge for now, very happy with that. 👍 Edited May 17, 2023 by Jon J 1250 1 Link to comment Share on other sites More sharing options...
Peter Truman Posted May 17, 2023 Report Share Posted May 17, 2023 I've used the same thermostat cover for the electric rad fan auto cut in/out switch with brass male/female fitting to ensure the switch bulb doesn't interfere with the thermostat., all works well 1 Link to comment Share on other sites More sharing options...
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