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What should I pay for an engine rebuild?

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    What should I pay for an engine rebuild?

    Hi everyone,
    The misfire on my Stag has been diagnosed as due to low compression on 2 cylinders aggravated by the use of French supermarket petrol - ethanol. My Stag specialist is saying that whilst the problem could be valves at 68k miles a rebuild would be justified. Cost estimates depending on what is found is a mere £5k to £6k. The advantage is of course I should 'know' I then will have a good engine all sorted.
    Two thoughts come to mind. Is the cost about right?
    Are rebuilt secondhand engines available from SOC members for less?
    Would appreciate advice, comments and offers
    Nigel
    Further thought - can I sell and cut my losses and find another Stag that is better? ( I have probably already spent more on the car than it's worth).

    #2
    Well he would think a full rebuild is justified. I think price quoted is at top end. If adjacent cylinders are down it may be head gasket. Could also be valves. Top end rebuild would be a fraction of that cost. More detail needed.

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      #3
      5-6K? you will find a much better deal

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        #4
        My engine rebuild came to £5500 including removal and refit of engine, replacement of water pump with an EWP complete with controller, moved and uprated alternator, fitting of electric fan, Engine rebuild included tufridden and balanced crank, head skim and rebush for jack shaft and all fluids. Would have been around £4500 if just a straight rebuild. Price also included a revisit at 500 miles to re-torque head. Job done by EJ Wards.

        Dave.
        Dave.
        Expert:- Ex is something that has been and spurt is a drip under pressure.

        Comment


          #5
          Originally posted by KOY 23 View Post
          Well he would think a full rebuild is justified. I think price quoted is at top end. If adjacent cylinders are down it may be head gasket. Could also be valves. Top end rebuild would be a fraction of that cost. More detail needed.
          Unfortunately the cylinders with low compression are on opposite sides. Otherwise I would also suspect a head gasket. I suspect valves as previous owner DID NOT use a lead additive.

          As for rebuilding against top end only work with nearly 70 k miles is there not a risk that a new reinforced top may lead to bottom end issues?

          Nigel

          Comment


            #6
            I have a rebuilt unused engine that Ralph of rallyn motors built for himself but unfortunately passed away before he got to use it is complete with all ancillaries and
            Has been bench run to check it over is mated to a recon bw35 auto gearbox
            Was looking for £3000 no exchange needed
            Stag Owners Club Forum has registered Tonywhite as a Trader in used parts for The Triumph Stag. 13.12.2017

            Comment


              #7
              Hi Tony PM sent.
              Originally posted by Tonywhite View Post
              I have a rebuilt unused engine that Ralph of rallyn motors built for himself but unfortunately passed away before he got to use it is complete with all ancillaries and
              Has been bench run to check it over is mated to a recon bw35 auto gearbox
              Was looking for £3000 no exchange needed

              Comment


                #8
                Originally posted by Tonywhite View Post
                I have a rebuilt unused engine that Ralph of rallyn motors built for himself but unfortunately passed away before he got to use it is complete with all ancillaries and
                Has been bench run to check it over is mated to a recon bw35 auto gearbox
                Was looking for £3000 no exchange needed
                Hi Tony
                Pm sent.
                Best
                Nigel

                Comment


                  #9
                  Originally posted by RobinLegin View Post

                  As for rebuilding against top end only work with nearly 70 k miles is there not a risk that a new reinforced top may lead to bottom end issues?

                  Nigel
                  This is what faversham classics and robsport have told me. Both came up with six grand for a complete turn key job.

                  I have exactly the same dilemma as you.

                  I have been agonising over the options for a while and get equal numbers of opinions on both sides.
                  In the end I don't think you will get a definitive answer either way. You will just have to do what feels best to you.
                  At the moment I am on the side of the new engine!

                  Comment


                    #10
                    Have found a reputable engine builder who can supply or rebuild your engine for £4000 with 12 months guarantee on an exchange basis
                    Last edited by Tonywhite; 19th June 2017, 06:56.
                    Stag Owners Club Forum has registered Tonywhite as a Trader in used parts for The Triumph Stag. 13.12.2017

                    Comment


                      #11
                      Hi Tony. Have sent a text today following our brief meeting just before the arrival of the grandson.
                      Best
                      Nigel

                      Comment


                        #12
                        Originally posted by RobinLegin View Post
                        due to low compression on 2 cylinders aggravated by the use of French supermarket petrol - ethanol.
                        Use of unleaded or ethanol based fuel will make NO DIFFERENCE whatsoever to the engine.
                        The real compression ratio of the engine with all the restrictions is FAR TOO LOW to worry about it.
                        Because the heads are made of alloy, already has hard(ish) valve seats. (about 4.5-5.1:1 REAL).

                        That engine will run perfectly ok with no damage on the lowest grade of petrol found in Eastern Europe.
                        92 octane.

                        Comment


                          #13
                          Originally posted by down_the_plug_hole View Post
                          Use of unleaded or ethanol based fuel will make NO DIFFERENCE whatsoever to the engine.
                          The real compression ratio of the engine with all the restrictions is FAR TOO LOW to worry about it.
                          Because the heads are made of alloy, already has hard(ish) valve seats. (about 4.5-5.1:1 REAL).

                          That engine will run perfectly ok with no damage on the lowest grade of petrol found in Eastern Europe.
                          92 octane.
                          i always understood that it was the exhaust valves that were the issue. TR7 exhaust valves were the ones to use

                          my stag runs like **** on the cheap french unleaded so I don't

                          I tend to avoid UK supermarket unleaded for the same reason

                          Normal unleaded is good, super unleaded is nicer imho
                          Stags and Range Rover Classics - I must be a loony

                          Comment


                            #14
                            Over the run of 10,000 miles a year in my Stag, I have tried several brands of unleaded, super unleaded and European unleaded. I have never noticed any difference at all.
                            Except that super unleaded empties my wallet faster.
                            Mabel is a white 1972 Mk1½, TV8, ZF 4HP-22 auto,
                            2016 RBRR finisher. 400 mile C2C 21/22 April 2018!

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