Morris Minor Owners Club

they are now at 75 i did'nt have a phone call so I have sent another e mail see if I get an answer,sump will stay off a bit longer.I still could'nt get MSA-33 to com up on the arp site 206-5401 looks similar I have plain tops to the studs, no hex.there was no leaflet in my kit..

the first pic is a spare block i've got bored to 40+ any idea what it's worth?

Looking good.

A bit more information to digest:

ARP have listed three different Fastener Tensile Strength (PSI) figures listed dependent upon the Tensile Strength. They are:-

170,000 PSI, 190.000 PSI & 220,000 PSI

MSA33 are listed as 190,000 PSI. and have a torque setting of 75 ft lb when using ARP thread lub.

Those ARP studs listed as suitable for your engine and having a 170,000 PSI have a lower torque setting when using ARP thread lub at around 65 ft lb which is still not 55 ft lb.

I would be asking Nick Swift what is the PSI of the studs being supplied.

Phil

Thanks for that Phil,they are at 70 now bit reluctant to change from that now,trouble with no paperwork with it,head fit is straight forward,everything supplied..

Hi Phil,fitting my timing chain next,I seem to have to much end float on cam 25 thou can't find data and cant ever remember it being that much new thrust fitted.it seems it could do with a thinner gasket underneath, silly answer? can't see for it shims available i'm trying to line up the 2 sprockets i've got crank shims . With the engine sitting up it's ok but with the movement of the cam the sprocket rises,any though.?

The data on camshaft end float is set out in the BMC wksp manual in the section relating to the 1098cc 10MA engine/camshaft.

Note: it was not considered necessary to give a specification for the 803cc & 948cc engines as there did not seem to be much if any variances in the camshaft sprocket machined dimensions. Only with the 1098cc engines was the end float specification given. Perhaps the end float had escaped the BMC engine designers mind.

The camshaft end float should be 0.003" - 0.007".

Have you replaced the camshaft thrust washer?

https://www.morrisminorspares.com/engin ... 84-p830479

They do wear and that allows excessive end float.

There are no shims available for adjusting the camshaft end float.

All you can do (if you have replaced the camshaft thrust washer) is to accept the end float is outside BMC specification or with the use of a lathe remove metal from the camshaft sprocket central boss to reduce end float or remove metal from the shoulder of the boss to increase end float.

new sprocket has less shoulder than old one

The width of the shoulder will have no bearing on the end float.
The critical measurement is that from the rear face of the sprocket which buts up against the camshaft to the rear face of the shoulder.

Phil

I have just had to machine a few thou off the shoulder of that duplex sprocket I bought from you last year.
If I had not checked it and just fitted it as it was, there would have only been 0.001" end float.

Phil

Just a couple of photos to show where to machine metal from if the camshaft end float needs to be adjusted.
Above:- Take off metal here if you need to reduce the end float.
Above:- Take off metal here if you need to increase the end float.

pgp001

Well done for doing the job properly.

Phil

thanks for that give it a go,i can see you've set up in a 4 jaw no probs

The outside jaw chuck is a 4 jaw self centralising item - so each jaw sits nicely on two sprocket teeth. It helps that the inside of the jaws are radial.

You will need a chuck that opens up to at least 5" internal. Also you will need to true align the sprocket with a dial gauge to get the thrust faces of the sprocket true to the camshaft and thrust pad.

job done 3 thou now i've got 3 new sprockets not one of them were the same..thanks again,sump is now on need to torque cam nut,any one know the torque please,books have not got a lot of info thanks

The torque setting of the camshaft nut is 60 to 70 lbf ft.

Thanks..

getting there now

question. when you use an engine stand to rebuild your engines, how do you get it off the stand?

I use my engine crane to separate the engine and engine stand.

i've got a sliding portable gantry which I made,no lifting in this warm weather i'm in my portable garage I got a Clarke one its brilliant,i'll takke a photo off the gantry tomorrow...stay safe

My gantry in my tent,really warm in here today

I had to skim a sprocket last week. Would have been circa 20 thou, now down to 5 thou.