Jkson 6/1 rebuild

[32 coupe]

Mike,
Don't forget some sealant when you install the new studs. They have been known
to leak coolant into the crankcase !

Gary

[mike90045]

...I have decided to make new studs . I ran a 3/4" BSW tap through the deck threads, the Indian studs are very loose in the deck threads . The Indian studs are made from a soft mild steel , its crap .  I will buy some 3/4 good quaility tensile rod and thread each end of it .  Mike

 I was wondering, are the head bolts/studs a super strong steel, that springs back after torque, or are they one shot, and nobody replaces them?  Replace after 3 head gaskets?  Never ?

And in this case, will chased threads in cast iron hold up to fresh studs?  (I've not been that deep, maybe there's 2" of thread in there)?

[dieselgman]

Those studs are manufactured of mild steel and have a certain amount of stretch designed in. I have never seen them break... generally will corrode away first from water damage. Replace them if pitted or excessively rusted for sure.
On the newer air-cooled models (with much smaller diameter studs), Lister recommends replacement at overhaul time... but again, not something I have ever seen fail.
As far as cast-iron threads are concerned, if in good condition - clean and complete, then no issues. The cast iron will hold threads quite well for a lifetime and only need to be cleaned or chased at rebuild time as you have mentioned.

dieselgman

[Gippslander]

A friend of mine was running a Chinese generator set one night . At about 3 am it stopped , he walked down to it to find the head had blown off it , the studs had broken 

[Gippslander]

hour meters

Do any of you guys fit a hour meter to your listeroid ? If so how is it done with a diesel ?

[dieselgman]

110vac meter connected with your generator head is an easy way to log all hours while generating power.

dieselgman

[mike90045]

hour meters

Do any of you guys fit a hour meter to your listeroid ? If so how is it done with a diesel ?

I manually log, my inverter counts the generator hours

[Gippslander]

110vac meter connected with your generator head is an easy way to log all hours while generating power.

dieselgman

Ah yes of course . Over here its 240 Volts but will work fine with the correct meter

[dieselgman]

Oh, yes... of course your local voltage will be pertinent, (frequency as well)! I think that the most common AC hour meters will work properly at 240vac. They will be specified and labeled with the proper voltage range as well as frequency range.

dieselgman

[BruceM]

There are some self- lithium battery powered vibration sensing meters that can be mounted to the fuel tank frame or elsewhere.  They are a mixed bag but none are very durable.  I think 4 years is the longest I had one working. One failed in few month.  One stopped keeping time properly after just a few days.  Engine vibration is not good for electronics.

 I switched to a 12v unit last year that counts time whenever my engine controller is switched on. 

[Hugh Conway]

Counting hours?
I use a log book to record that, along with oil change and other maintenance info. There is a clock in the shop, so .....
Paper and pencil.....low tech.
Cheers,
Hugh

[Gippslander]

Well the .005 shim steel arrived and I tried it out . It works great     I used a 1.5mm gasket as a initial  setup , and then I wrapped the shim steel around the casting, it all slid into the bore hole easily . The sloppy .010" up/down movement of the casting has disappeared .

I now will install the crankshaft for a test fitting . My plan is to begin by fitting the opposite bearing casting with no gaskets , I will tighten the nuts just enough to get the preload , then I will measure the gap between the casting and the block with feeler gauges, this should give me an idea of how many gaskets I need .

[32 coupe]

Mike,
I am still wondering how you will hold the shim stock in place
I must be missing something here.....

Gary

[Gippslander]

Mike,
I am still wondering how you will hold the shim stock in place
I must be missing something here.....

Gary

hi Gary

The shim is sandwiched between the bore hole and the casting . I did use permatex sealant , the permatex should
help hold the shim .

[Gippslander]

Well I have the crank in the block, without gaskets. I measured the gaps and I am getting about a equal  1.5mm gap each side .

My plan is to make up two metal gaskets 1mm thick, then use paper gaskets to adjust the last pre load adjustment

I just dont like paper gaskets that thick with TRB's . With the plain bearings , I think all paper is fine