[C320-list] Another Perkins M30 Overheating Help Thread

[Dave Hupe]

The suggestion to see if your hot water heater does heat up just by engine operation definitely is a good indirect test.  

The internal engine coolant system is not a high pressure one (I believe 7 psi). So, I would make sure your coolant overflow tank is full to the low mark before starting the engine and also make sure your coolant is full in the heat exchanger tank (fill to just below the "radiator" cap neck to make sure the exchanger tube is submerged in coolant). I would then leave the cap loose and run the engine. Once the engine heats up, you can carefully remove the cap and actually see coolant flow to confirm you have coolant circulating. 
Dave Hupe 
1994 C320 #32

Sent from Yahoo Mail on Androi 
 
  On Mon, May 29, 2023 at 10:28 PM, Paul Hetherington via C320-list<c320-list at lists.catalina320.com> wrote:   Some good thoughts here. Thanks to all.  Will be trying a few things.

One thing that has come up, how would we best confirm the non-raw (so
fresh) water pump is working well?  There is no impeller that I know of, so
not entirely sure how the water is 'pushed' around the circuit. It would
stand to reason that if this water isn't moving well then the cooling
transfer won't be efficient and the temp would rise.  I'm just not sure how
to best test this.

Cheers.

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Paul Hetherington
Hull 155, 1994 Seasun.