I'm in the midst of replacing the Fresh Water
Circulation Pump. Look there. If you have coolant seeping out from the gasket
or from the bearing (like Me!). Pull the pump and replace it. You have to look carefully because the pully hides the shaft and can obscure the edge of the gasket. If it is the pump, it is removed by 4 bolts. Along with the pump you will need to replace the gaskets. There are 2 of them. This is the layup
1: Gasket #1 between block and spacer plate.
2: Spacer plate (this is about 3/16" or 1/4" thick).
3: Gasket #2 between the spacer plate and the pump
4: The Pump.
INFORMATIONAL ALERT! INFORMATIONAL ALERT!
The 2 gaskets are different. If you buy 2 of the same you are screwed. Deal with a Perkins
part supplier who knows that engine. You are on the east Coast
call TAD - Trans Atlantic Deisle. Also , you will have to take the old pump to the parts
supplier, they will need to press it off your old pump and onto your new one. The whole thing should run about $160.
If it is not the fresh water pump. Follow the circut around. It may be either a hose or the bottom of the Heat Exchanger. The bottom cap is removable and has a gasket. I'm going to rule
out a blown head
gasket. Other problems would show up there.
I'm going to rule out internally leaking oil coolers or Heat Exchanger since you see the coolant collectly under the pan.
Good luck, this info is worth exactly what you paid for it and no, you may not borrow my tools.