SteveBorland
VIP MEMBER
- Joined
- Nov 15, 2010
- Messages
- 858
After my little incident with melted pistons at Spa this year, I decided to split the crankcases just to have a look inside. I was not going to do this since the crank felt fine, the cam and followers look great, what could possibly go wrong??? Hmm, what's that I see on the magnetic drain plug? Little shiny bits???? Where do those come from?
Anyway, the timing side main bearing inner race has some nasty spalling damage, so now I'm into changing both mains. I've ordered new bearings plus other stuff from RGM (they offer mains in C2 and C3 classes, so I chose the C3 bearings after doing quite a lot of reading.
As far as I can see, the outer races will come out simply by heating the cases. We have an industrial oven at work that will go up to 200 deg. C - is this hot enough?
The other thing I'm wondering about is the drive side inner race. These seem to be quite a tight fit, and I often see references to a special puller being used.
Generally I prefer to do as much work as possible myself (then I know who to look at when it goes wrong) but I don't see any point is spending quite a lot of money on a tool I will only use once.
I hope...
If this special puller is actually necessary, then I will probably hand the whole job over to a local mechanic who seems to be quite good at this sort of stuff.
Any views or comments on this?
I received my new JS pistons last week (hand carried to Ireland and then posted from there - it's amazing what we will do to avoid the dreaded tax man
. Pure mechanical porn, each packed in it's own little cloth bag. Almost too lovely to hide inside the engine, but at that price, there's no way I'm ordering another set as decoration!! Hopefully the extra 0.5mm between the valve recess & the rings will make it more robust, and more to the point, I will be paying much more attention to the mixture (as well as ensuring that the bloody manifold bolts do not loosen off this time!!!!!)
/Steve in Copenhagen
Anyway, the timing side main bearing inner race has some nasty spalling damage, so now I'm into changing both mains. I've ordered new bearings plus other stuff from RGM (they offer mains in C2 and C3 classes, so I chose the C3 bearings after doing quite a lot of reading.
As far as I can see, the outer races will come out simply by heating the cases. We have an industrial oven at work that will go up to 200 deg. C - is this hot enough?
The other thing I'm wondering about is the drive side inner race. These seem to be quite a tight fit, and I often see references to a special puller being used.
Generally I prefer to do as much work as possible myself (then I know who to look at when it goes wrong) but I don't see any point is spending quite a lot of money on a tool I will only use once.
I hope...
If this special puller is actually necessary, then I will probably hand the whole job over to a local mechanic who seems to be quite good at this sort of stuff.
Any views or comments on this?
I received my new JS pistons last week (hand carried to Ireland and then posted from there - it's amazing what we will do to avoid the dreaded tax man
. Pure mechanical porn, each packed in it's own little cloth bag. Almost too lovely to hide inside the engine, but at that price, there's no way I'm ordering another set as decoration!! Hopefully the extra 0.5mm between the valve recess & the rings will make it more robust, and more to the point, I will be paying much more attention to the mixture (as well as ensuring that the bloody manifold bolts do not loosen off this time!!!!!)/Steve in Copenhagen
