Crankcase bearing fitting

Time to start putting my motor together       
What is the best way of fitting the new bearings (all of them).

Option 1 - Gas heat gun

Option 2 - Samsung oven (when the lady is out) - If this is the best option then what temp is safe.

Thanks

What about the freezer   

Mad Frosty wrote:What about the freezer   

Yes, I will hide the bearings in there overnight   

Was a bit tricky getting the main bearings out - They are in a 5mm thick steel sleeve in the casing - obviously that heated at the same rate as the bearing.

Hopefully a preheated case and cooled bearing will do the trick - I read the casing should be heated at 105C for 30 mins

I have can of spray from the bay called the freeze release , you can spray it on the bearinng to shrink it before pulling it out or installing it .

Place the bearings in a plastic bag in the freezer
Wrap each of the cases in foil to keep the oil smell to a minimum and heat to 130 degrees C for 1/2 hour.
Take the cases out one at a time and carry to your work bench with oven gloves. Buy your wife a new pair as a present prior to this.  
The old bearings will fall out, even the ones you don't want to change, although they might need a slight tap.
Take the new bearings from the freezer and drop them in again they may need a slight tap to make sure they are fully home.

Very effective and wrapping the cases does mean that the oven can be used for food straight after.

First time I did this I heated cases up to 200 degrees C without any covering, set off the smoke alarms in the house and ate cold shoulder for a week afterwards.  

Hew wrote:Place the bearings in a plastic bag in the freezer
Wrap each of the cases in foil to keep the oil smell to a minimum and heat to 130 degrees C for 1/2 hour.
Take the cases out one at a time and carry to your work bench with oven gloves. Buy your wife a new pair as a present prior to this.  
The old bearings will fall out, even the ones you don't want to change, although they might need a slight tap.
Take the new bearings from the freezer and drop them in again they may need a slight tap to make sure they are fully home.

Very effective and wrapping the cases does mean that the oven can be used for food straight after.

First time I did this I heated cases up to 200 degrees C without any covering, set off the smoke alarms in the house and ate cold shoulder for a week afterwards.  

Lucky my casings are 100% clean - Bearings are in freezer at -26C - Will see if my casings fit in the oven   

Crikey...-26C...are you into cryogenics???

Left side bearings in   

Have any of you guys tried cleaning engine parts in the dishwasher? Are you still alive?

BTW, all bearings in

Well......
Yes I have cleaned a couple of cases in the dishwasher. It certainly cleaned them up although it did darken the colour of the alloy by quite a bit. The wife insisted on running the dishwasher empty for a full heat full length cycle afterwards but it was ok and the next utensil wash was fine.
My friend waits until his wife goes out but I am stuck as I have no idea how kitchen appliances work  

Hew wrote:Well......
Yes I have cleaned a couple of cases in the dishwasher. It certainly cleaned them up although it did darken the colour of the alloy by quite a bit. The wife insisted on running the dishwasher empty for a full heat full length cycle afterwards but it was ok and the next utensil wash was fine.
My friend waits until his wife goes out but I am stuck as I have no idea how kitchen appliances work  

Testing the dishwasher on a spare scooter case i have - Wife having afternoon nap - less than an hour left...

I did clean the part pretty well before though - Just saying.

Had my XR cases soda blasted - took all the stains off the ally.

Anyway, now that all the bearings in the XR cases I will press the crank in this week and at least assemble the bottom end next weekend...

Hew wrote:Well......
Yes I have cleaned a couple of cases in the dishwasher. It certainly cleaned them up although it did darken the colour of the alloy by quite a bit. The wife insisted on running the dishwasher empty for a full heat full length cycle afterwards but it was ok and the next utensil wash was fine.
My friend waits until his wife goes out but I am stuck as I have no idea how kitchen appliances work  

Dishwasher is not a good idea!! - The casing came out dark grey same as when you leave AluBrite on for too long - Apparently the dishwasher pills are caustic!! I will take the case to my mate next weekend and soda blast it to get the right colour back.

That's right many chemicals used in the kitchen are too agressive to use on a bare metal, except stainless steel or stuff that was designed to be washed this way .

Chris_w_65 wrote:

Dishwasher is not a good idea!! - The casing came out dark grey same as when you leave AluBrite on for too long - Apparently the dishwasher pills are caustic!! I will take the case to my mate next weekend and soda blast it to get the right colour back.

Make sure that you scrub oil into the casing to make sure that they don't start to corrode.

Crank is in the freezer now - Will let it get nice and cold and then get the left casing and the right main inner race in the oven and hopefully get all done before the wife gets home from work

Crank in :-)
Time to bring the motor inside and finish building it in my office