Thinking of installing a temperature gauge

Discussion in 'Sparky's corner' started by Robroy455, Dec 17, 2007.

  1. Smartin

    Smartin antiqueautomotiveservice.com Staff Member

    If you're going to use a T fitting, then remove the piece on the passenger side front of the intake manifold. That is the temp sensor, and you won't have to worry about making the hoses fit with the original sensor in a different position. It's just one wire.
     
  2. JohnKaz

    JohnKaz Well-Known Member

    Just add one more to the 'thanks' list for the advice...I'm in the same position in terms of adding gauges and this all has been very helpful. Tony, particularly, was kind enough to send a manifold photo to me.

    John
     
  3. Poppaluv

    Poppaluv I CALL WINNERS!!!

    Where would the best place on the firewall for the tubing. :Do No: I can't see any obvious holes, plus in a full sized car such as ours and 6 ft of copper. seems to cut it close.
     
  4. tlivingd

    tlivingd BIG BLOCK, THE ANTI PRIUS

    Pop, look where the vacuum line from the vacuum bulb to the controls, goes back into the dash. if it's like the A bodys there is a 1.5-2" hole covered by a rubber plug with the vacuum lines going thru it a temp sending unit will fit thru this hole. it pops right off and has a slit in it to add the hoses. not sure if the big cars have this but would imagine it would.
     
  5. Poppaluv

    Poppaluv I CALL WINNERS!!!

    Thanks Nate!

    I'm concerned that 6 ft. isn'y going to be enough to go up, in then down. I was aiming to pretty much go straight rearward from the "T" fitting ,just above the tranny hump and in. Don't know if I should be drilling more holes.:Do No:
     
  6. tlivingd

    tlivingd BIG BLOCK, THE ANTI PRIUS

    I'm not sure where your adding your temp gauge but I put a T on the back pickup in the intake (on a 350 car) where the return for the heater was. it did not work correctly there. I had to use one of the two ports on the front of the intake for correct temp readings.
     
  7. Robroy455

    Robroy455 Well-Known Member

    I have the three gauges now and even found the T-brass fittings although Im not sure its the NTPF thread, the packages only states and . Found them among compressor accessories at one of those huge stores where the personal knows absolutely nothing about what therere selling. If the thread shows to be right Im only missing two adapters from - M10 and -M10 since the sending units are M10 to the gauges, that shouldnt be a problem to find I hope.
    I have given up the thought to put the gauges inside the ashtray for now. I bought a black metal triple gauge holder instead that will blend in rather ok if I put it on the lower part on the outside of the ashtray.

    The idea came up to find the kind of gauge housing to be mounted on the floor over the tunnel. The one Im thinking of is a small black plastic console to be put under the dash and that could hold the three gauges and have little storage space where you can put cell phones, keys etc.
    That would be a really neat solution but Im unable to find such on the market, if anyone should have a lead for me it would be much appreciated!
     
  8. tlivingd

    tlivingd BIG BLOCK, THE ANTI PRIUS

    If the threads are tapered, meaning if female the furthest out is a larger dia than the inner. another check is to take something streight and pretty small and if it angles away from the center it's more than likely an NPT

    [​IMG]

    on the right is a correct NPT thread type. note taper on both the male and female parts.

    on the left the male thread is a NPS thread (straight thread like a bolt) however the female portion still has a taper, this is incorrect.
     
  9. ford2

    ford2 Well-Known Member

    Quote;The idea came up to find the kind of gauge housing to be mounted on the floor over the tunnel. The one Im thinking of is a small black plastic console to be put under the dash and that could hold the three gauges and have little storage space where you can put cell phones, keys etc.
    That would be a really neat solution but Im unable to find such on the market, if anyone should have a lead for me it would be much appreciated.

    I have the short console that I fitted for just that,but have not got around to shifting gauges yet.There is plenty of room for a taco as well.When you stop just pull the roller lid and its all hidden.



    Tony. :Comp:
     
  10. Robroy455

    Robroy455 Well-Known Member

    Thanks for the clear and helpful info regarding the NPT thread Nate!
    I’ve heard about they being conic since we have water connections of such type on one of the machines I’m working with, this particular machine is built in SC/USA. That thread type is probably pretty rare here otherwise…
    I’ll check the ones I bought if they seem to be tapered or not, plan B will be to order from the company Larry posted a link to earlier in this thread, or ask my colleagues in SC to help me out.

    Hey Tony, sounds like you have something similar to what I was thinking of!
    I’ve been looking on Ebay to find this type of console but without result. Almost all modern cars already have middle consoles so the after market mainly offers A-pillar consoles :pp
     
    Last edited: Feb 11, 2008
  11. Robroy455

    Robroy455 Well-Known Member

    I had a closer look on the T-brass fittings today, tried to see if the thread was conic or not by aligning a straight object to them, and as far as I could see its probably not a NPT (see pict below)
    They were like 3 bucks each so its no biggie, I just need to find the correct ones instead
     

    Attached Files:

  12. Smartin

    Smartin antiqueautomotiveservice.com Staff Member

    Just looking at them, they look like the right threads. It's difficult to tell if the top ones are tapered or not. Set the fitting on its side and take a picture of the threads parallel with a solid flat surface. The bottom threads look tapered, but it could be an illusion.

    I'll take a picture of a 1/2" fitting and a 3/4" fitting to show you how much they are tapered.
     
  13. Smartin

    Smartin antiqueautomotiveservice.com Staff Member

    The copper fitting is the 3/4", and the brass one is 1/2". You can see the taper on the bottom of the threads along the countertop, as well as the line I drew to illustrate the slope along the top. I might have gone a little steep on the 3/4", but the 1/2" fitting has a good slope line that I drew.

    [​IMG]

    [​IMG]
     
  14. tlivingd

    tlivingd BIG BLOCK, THE ANTI PRIUS

    that male one looks right to me.
     
  15. Robroy455

    Robroy455 Well-Known Member

    Appreciate your input fellows!
    Encouraged by the fact that they might be the right ones I went out to the garage today to take off the stock sending units and see if they fit in the T-fittings, problem was that I had no open wrench big enough :Dou: . The largest I have is 15/16 and the sender units seemed to have like a 1 fitting.
    I did however take some more picts, of the larger fitting this time (it was 1/2 in post 51)

    Need to go wrench shopping and to find adapters from -M10 and -M10... :puzzled: :rolleyes:
     

    Attached Files:

  16. Robroy455

    Robroy455 Well-Known Member

    The triple gauge set is waiting on the work bench...:kodak:
     

    Attached Files:

  17. Robroy455

    Robroy455 Well-Known Member

    The NPT is for oil and the NPT is for water, right?
    According to post 2 in the thread below, its 1/4 NPTfor the oil, and 1/2 NPT for the coolant?? :Do No:
    http://www.v8buick.com/showthread.php?t=96696
     
  18. Smartin

    Smartin antiqueautomotiveservice.com Staff Member

    I wasn't specifying a size to use. I was just using a couple fittings I had on the truck to show you what tapered threads look like.
     
  19. Robroy455

    Robroy455 Well-Known Member

    Sorry Adam, just got insecure....
    suddenly seemed so small with that 1 wrench fitting.
    So and it is then
     
  20. Robroy455

    Robroy455 Well-Known Member

    Life is too funny sometimes
    Yesterday I asked my good friend Jack in SC for help getting the desired brass reducers 1/2 NPT-M10 and 1/4 NPT-M10. He promised to see what he could do and came back to me a little later asking if I wanted M10x1.0, M10x1.25 or M10x1.5?
    I called the shop where I got the gauges and the only thing they knew was that it was M10 for the oil sending unit and M8 for the water?? I told them I found that strange since their page on internet clearly stated M10 for both!! :mad: Regarding the pitc on the threads they didnt know, so I asked for the number to their supplier of the gauges and then called them.

    Guess what, the thread size for both sending units turned out to be 1/8-27 NTPF!!! :shock:
    Figure this will increase my chances of finding the correct adapters though...

    Is NTP and NTPF close to be the same thing?
     

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