I need to source a new crankshaft for my engine rebuild. Current shaft is original 6 bolt part number C2239. Big ends are already at 0.040" and need cleaning up.
What crank can I use, keep in mind that I would like to use original flywheel and front pulley, etc. I will be using an upgraded rear seal.
What are my options, I have seen some suppliers have 0.060" bearings, but they aren’t in stock and are very expensive.
For everyone who can add I will provide the following info:
Engine No. W2524-7
Chassis: 660365
Photos of the crank and flywheel. Note the flywheel seems to have been lightened.
Rob,
What engine would have had that flywheel then? When did they go from six bolt to 10 or 12 bolt. There was no part number stamped on it anywhere I could see.
Which crankshafts can I use?
I am imagining from what you are saying that the mark vii flywheel and crank are a straight swap into the engine I have. Is the mark vii flywheel the same amount of teeth?
Thanks for replying.
Matt
All Mark VIIs and Mark VIIIs used the same C4808 crank and C4809 flywheel, though not of course automatics. Near as I recall it was 132 teeth when we discussed flywheels on this forum. There was a weight reduction with flywheel C5808.
Hmm, 6 bolts at 60 degrees with 2 dowel pins at 30 degrees, vs 10 bolts and 2 dowel pins all at 30 degrees, so I guess it works. Odd though.
Since we are on crankshafts, notice another bit of fun.
So 3816 XK120s and 6199 Mark VIIs or 10,015 engines had the starter jaw bolt on the front of the crank, but only 96 XK120s had the starting crank handle.
If you go for a rear seal conversion you can use ANY 3,4/3,8 crank. The early cranks are lighter
and the counterweights are set in a different possition, but both do the job, Your flywheel
will fit any 3,4 /3,8 crank Having mounted both types of crank ion a mill, to machine off
some of the forging irregularities, the early crank is tiougher to cut,. I was informed some yrs
ago by a ex Jaguar engine man that the early crank is EN24 and the later EN16. How true
these specs, I know not…A factory lightened flywheel looks as photo.
Peter B
Thanks for that info. Now I can move forward. In a way having a flywheel with 10 bolt is a blessing and means I can use any crank.
I can confirm my crank has the starter jaw bolt and I just assumed someone had changed out the radiator core as there was no crank handle hole.
Peter,
That is exactly what I needed to hear. Thanks for your help. The flywheel I have has been lightened but is not factory. All this was done way back in the early history if this car. Your photo will help in identification.
I will work out what I am going to do and will post back here so anyone in the same position can have a reference.
Only the first 99 cars had the hole in the radiator.
I suspect the person responsible for ordering parts from outside sources ordered 100 of each part, radiators, steady brackets and handles, but somehow got 10,000 starter jaws. Perhaps the supplier quoted a price for one batch (of 100) and the buyer ordered 100 (not knowing it was batches).