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    Water in the back bores

    Apologies, I'm sure this is covered somewhere in the forum but I cant find my issue described. Please send me a link if there is something...
    My Stag has stood since December, when I decided to replace the fuel tank and carb. I've fitted an aluminium tank and Weber carb and tonight was the night to start it after connecting everything back up. Before turning the key I took out the plugs to clean and gap and to my horror water dribbled out of plug closest to bulkhead on RHS when stood at front of car. Using a boroscope I could see water sitting on top of the piston, so I span the engine without HT lead connected which cleared the bore of water. I checked other plugs and found droplets of water in the back bores - there may have been more water before I span the engine over.
    So, I thought head-gaskets and then remembered reading on here about leaking inlet manifold gaskets. Am I right in thinking that the water-ways for the inlet manifold are only on the back bores? If so, it seems too big a coincidence that the back bores had water in. With plugs in and HT lead connected the engine started and ran smoothly with no steam. There is no water in the oil.
    Can anyone please confirm my thoughts, having had a similar experience. I'd really appreciate your help, thanks!
    The good news is the Weber carb meant almost instant starting and smooth tick-over from cold. I'm looking forward to driving it once this water issue is resolved.

    #2
    Had similar, but only on the left hand side. It was sorted by fitting new inlet manifold gaskets, though 6-months later I did have HGF, so perhaps that might have contributed.
    White 1976 build ("Mk2") only a few mods

    Comment


      #3
      Maybe a coolant system pressure test or manifold off to investigate is required.
      Use polyurethane sealer on the manifold gaskets.
      There are 2 secrets to staying on top :- 1. Don't give everything away.
      2.

      Comment


        #4
        I think you will find that if you fit payen gaskets ( the ones with the angle slots in) them then when you get a small capillary leak the water runs down the small groove in the head to the V and not in the bores if that valve is open, someone will correct me if I'm wrong

        P1090115.JPG
        Last edited by MandM; 9 June 2021, 06:59.
        "The UK,s 2nd Most Easterly Stag" Quad Exhaust- ZF 4 Speed BOX

        Comment


          #5
          The angle slots are designed for exactly that sort of thing, is that the sort that are fitted, or don't you know ?.
          Excess silicon sealant will block those slots, so don't use it. Poly sealant is good, I use Wellseal.

          Comment


            #6
            You may already be aware that trying to crank an engine with water in a cylinder or two can result in bent conrods, as water doesn't compress so, until you've resolved the ingress problem, always worth spinning the engine over with the plugs out. I drape kitchen roll over the plug holes to get clear witness marks. I pull the inertia switch to limit any fuel being drawn in, though this can be checked by sniffing any wet paper. I also disconnect the coil LT wires.
            White 1976 build ("Mk2") only a few mods

            Comment


              #7
              Thanks very much for taking the time to reply!
              I don’t know how the Payen gaskets work as I don’t see where the water that runs into the V would come from?
              I did worry about having turned over the engine with just one plug out and possibly having had water in other bores, but since it didn’t make and unusual noises turning over and then ran without noises I think I got away with it.
              So I will remove and replace gaskets- are the Payen type the ones to use?
              One more loosely related question, I wish to remove the drain plugs and clean out waterways as part of a flush but can’t find any images of where these are located - can anyone help with that please?
              cheers, Rich

              Comment


                #8
                Originally posted by StagRiches View Post
                Thanks very much for taking the time to reply!
                I don’t know how the Payen gaskets work as I don’t see where the water that runs into the V would come from?
                I did worry about having turned over the engine with just one plug out and possibly having had water in other bores, but since it didn’t make and unusual noises turning over and then ran without noises I think I got away with it.
                So I will remove and replace gaskets- are the Payen type the ones to use?
                One more loosely related question, I wish to remove the drain plugs and clean out waterways as part of a flush but can’t find any images of where these are located - can anyone help with that please?
                cheers, Rich
                Accessed from underneath the car. 3/4 “ a/f. Usually brass or dirty brass colour!
                There are 2 secrets to staying on top :- 1. Don't give everything away.
                2.

                Comment


                  #9
                  0DEF7F89-4C11-44C8-ACC5-00538CA549F3.jpeg 3CEA9036-6B84-4ED4-BB8F-BA19CA50A16F.jpeg
                  Dave
                  1974 Mk2, ZF Auto, 3.45 Diff, Datsun Driveshafts. Stag owner/maintainer since 1989.

                  Comment


                    #10
                    That’s great, thanks. Mine must be covered in oil!

                    Comment


                      #11
                      Originally posted by StagRiches View Post
                      Thanks very much for taking the time to reply!
                      I don’t know how the Payen gaskets work as I don’t see where the water that runs into the V would come from?
                      I did worry about having turned over the engine with just one plug out and possibly having had water in other bores, but since it didn’t make and unusual noises turning over and then ran without noises I think I got away with it.
                      So I will remove and replace gaskets- are the Payen type the ones to use?
                      One more loosely related question, I wish to remove the drain plugs and clean out waterways as part of a flush but can’t find any images of where these are located - can anyone help with that please?
                      cheers, Rich
                      does this help?

                      P1080685.JPG P1080717.JPG
                      "The UK,s 2nd Most Easterly Stag" Quad Exhaust- ZF 4 Speed BOX

                      Comment


                        #12
                        I had a mayonnaise type coating on my oil filler cap on short runs. folks said it was most likely a leaking inlet manifold. I replaced the inlet manifold gaskets and used Tiger Seal. I used thin gasket which don't have that slit

                        Comment


                          #13
                          I wonder why Triumph cast the channels in the head if they didn’t want the proper gaskets with slits used, bit like replacing fuses with cut down 6” nails. Use Wellseal and not dollops of silicon or polyurethane which will probably end up blocking the ports. If Wellseal doesn’t work then you have an alignment problem, sort that rather than bodging, which may cause other problems.

                          Comment


                            #14
                            Originally posted by KOY 23 View Post
                            I wonder why Triumph cast the channels in the head if they didn’t want the proper gaskets with slits used, bit like replacing fuses with cut down 6” nails. Use Wellseal and not dollops of silicon or polyurethane which will probably end up blocking the ports. If Wellseal doesn’t work then you have an alignment problem, sort that rather than bodging, which may cause other problems.
                            Quite agree, John. Yet one supplier sells various options for these gaskets, including wired ones and improved design, and none of them have the slit.

                            https://www.ejward.co.uk/?subcats=Y&...roducts.search

                            I have always sought out genuine Payen gaskets for this application, usually from LD, and Wellseal.
                            Last edited by DJT; 12 June 2021, 09:03.
                            Dave
                            1974 Mk2, ZF Auto, 3.45 Diff, Datsun Driveshafts. Stag owner/maintainer since 1989.

                            Comment

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