Strip and rebuild 2.8 IP

[solarman216]

The cut, just needs widening a couple of thou

 

[solarman216]

Comparison to my old original, new one is top, not bad if I do say so myself, as for the spring recesses, I have two choices (1) turn a couple of good fitting washers to fill the recesses, (2) use extra spacers under the springs, it seems it is very important to get the spring tension within 1mm with the springs firmly touching but without compressing, with what I have at the mo I am 3mm out, so while the motor is still on the road I will make a pair of spacers, then if the spacers etc currently in the motor prove to be insufficient then I have options, Rick

 

[Flying Torquewrench]

Looking good Rick! :thumb2 At least this time you are in control and can handle it with the care it needs.

The handle holes in the angle grinder are very handy. Mine spends the occasional bit of time in the vice with a bolt in the handle hole.

 

[solarman216]

Have been doing more checking and as far as I can tell with the equipment I have at the moment My grooves seems to be 0.01mm too short, this is important as that difference will make the pump too far advanced, not a lot but enough to effect EGT, the difficulty is getting a bang on measurement from the face of the plunger to the far end of the groove, Rick

 

[solarman216]

The problem is replicating the same measurements time and time again and getting the same results to 0.01mm and this has been the issue, think I have found the solution, bit of grinding to the depth rod on the calliper so it goes into the groove on the plunger but not grinding the very end so it abuts the end of the groove, pics tomorrow, eyes not up to it now, Rick

 

[solarman216]

This is what I have done to the depth rod, it now fits in the groove but the end is original size so it abuts the face of the slot, it is not set up correctly in the pic as could not get it to stay in the correct place but you get the idea I now need to remove between 0.01 and 0.02 from the face, Rick

 

[Flying Torquewrench]

Good to see that I am not the only one to modify my tools to make them suitable for the job on hand.

 

[solarman216]

Finished grinding the annular groove today and lapped it in with Goose Fat (did not have any Mutton Tallow) seems to have worked a treat, also made the two adaptors to fit the recessed spring holes in the head, one shown here

 

[solarman216]

I have made them a tad proud of the head surface reasoning that once I get my hands on the springs in my running pump, if I need to make adjustments I can do it on the adaptors instead trying to find thinner spring shims, so now all set for swapping the new head over, maybe this week end, Rick