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JAinVA

Cooling fins

By JAinVA, in Engines

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JAinVA    4,619

JAinVA
Posted (edited)

I just got a K321 engine in the shop today.The engine lost a rod and it welded aluminum to the crank.The crank had the pto shortened to about

an 1 1/2" so I will replace it anyway.The bore is good enough that a light hone and stock parts will be fine.The bad part is that the top 2 cooling fins

on the pto side away from the valve side got broken off.I have the pieces so I could silver solder back on.

My question is should I do that or leave it alone.Do anyone of Kohler guys have experience with this issue? I have other undamaged blocks but they all need to be bored.Thanks in advance for your perspective,JAinVA

Edited by JAinVA

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Ed Kennell    38,112

Ed Kennell
Posted

I don't have any practical experience Jim, but my gut is telling me two missing fins will not cause a significant increase in engine temperature..

Having said that, If you have the equipment to solder the aluminum, do it, if nothing else for cosmetic appearance.  :twocents-mytwocents:

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JAinVA    4,619

JAinVA
Posted (edited)

The missing cast iron sections are about 2" long. Cooling air blown by the fan are blocked between the 1st and second fins by a cast support section.Were it not for that the top fin would have received more damage.Like you I think it will be fine but it is surely ugly.

Its always something.Thanks,JAinVA

Edited by JAinVA
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JAinVA    4,619

JAinVA
Posted (edited)

I am going to try JB welds hi-temp bonding agent.It may have some heat transfer issues but at least it won't look so dam# ugly.Other than the fin damage this is a nice block.

I will definitely let the board know the results.I will post some pictures when I can.JAinVA

Edited by JAinVA
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