Anybody chipped or smashed a cooling fin on their Bosch motor?

[Ea9818]

This happened to my Bosch GEN four motor on my Orbea wild, now I just smashed one of the cooling fans on my Santa Cruz bullet.
There has to be other people out there riding chunky Gnar, smashing the non-drive side, cooling area of the motor.
The cooling fins literally stick out almost an inch from the frame.

 

[RustyIron]

I have a few dings in the non-drive side. I'm not too careful. If there are rocks, I just bulldoze over them. So far the motor hasn't cracked open like a chicken egg.

 

[RustyMTB]

Yep, about 2000 miles ago, still trucking just fine.

 

[hctagalong]

Also -- about 150 miles ago. Only thing I needed to do was file some of the resulting sharpness on one of the fins. No apparent effect on the motor's operation.

 

[nickf]

Yes, it's a design "feature"

 

[Deleted member 9676]

Fast descending on rocky terrain...

 

[dimitrin]

Oh yeah I've knocked a few of those fins off. As vulnerable as those motors are to getting bashed, you would think the engineers involved in integrating the motors to the frames would have an appropriate bash guide figured out by now.

 

[Ea9818]

Built my own small protector for the cooling fins out of Kydex and mastic tape.
That said, the plastic motor guard might be the best of any brand, I’ve smashed it so many times and it’s still going.

 

[irie]

Might have some damage to my 5,000 mile motor which after 4 years is still going fine so will have a look some time. Maybe.

 

[Stihldog]

Might have some damage to my 5,000 mile motor which after 4 years is still going fine so will have a look some time. Maybe.

Same. ^^^
Shortly after I purchased the Rail I chipped one cooling fin and broke another. I soften the edges and inspected the casing for further cracks.

The alloy skid-plate took/takes most of the impact and I’ve cracked a few of those. I keep a new spare. I know there are different materials and shapes for skid plates available but the alloy one works for me. My wife’s bike (Powerfly) has a plastic skid plate …which is fine for her.

Side note; on the new TQ-60 motor I read that they increased the size, or number of cooling fins, which may allow for the NM increase to 60nm. Perhaps that keeps the temperature down enough to justify the increase in power. I have the TQ-50 model on the Fuel EXE. I could be wrong though.

Edit; maybe Greg knows???