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  #1  
Old 27-05-12, 21:41
hrpearce's Avatar
hrpearce hrpearce is offline
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If you are using the original Blitz radiator with the overflow pipe soldered into the top of the tank the radiator cap has no influence on system pressure.
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Old 29-05-12, 02:07
Stew Robertson Stew Robertson is offline
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Thanks Grant and Phil
It all makes sense
of all the ones I have worked on I never really though about it
just always run no presure cap
See never to old to learn, now all I have to do is remeber it
Stew
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  #3  
Old 29-05-12, 03:22
Harry Moon Harry Moon is offline
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Default moisture?

Well I've always thought i might have an intermittent water leak into the crankcase as a pasty white film accumulates sometimes on the dipstick and oil filler cap. Nothing showed up this weekend. It was a hot dry day and about 100 minutes running time and no sign of any moisture when I checked it. Shorter rainier trips had been common for the previous couple of trips. Is moisture in the crankcase normal?
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Old 29-05-12, 03:37
Bob Carriere Bob Carriere is offline
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Default Warm humid coastal air......

...... and the engine is not running hot enough.

My 261 with a cardboard infront of the rad can hardly get above 162-5 degrees with the 160 thermostats....... I will no doubt replace with a 180 F

If water boils at 210 F .... you need to have the engine hot enough to evaporate the water vapour..... which should be sucked out in the PCV connection on the 261. Now your engine oil will always be about 40 to 50 degrees hotter than the coolant...... Most older engine suffered from sludge deposit which in combination with a high ash content in the older oil and water vapour would actually plug up the oil return openings in the overhead engines.... a 1/4 in. thick deposit was not unheard of.

Harry...... are you running some kind of PCV system on your engine..? and how hot does your engine run up to....? have you used the hand held infrared thermometer from Princess...?

The Dodge flat head six had the same problem...... could hardly get it to heat up....... and never boiled over....

Bob
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Last edited by Bob Carriere; 29-05-12 at 22:18.
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  #5  
Old 29-05-12, 05:01
Harry Moon Harry Moon is offline
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I wonder if the pasty white only shows up when I take the rad cover off? I usually have it mounted and that covers the lower half and does raise the temp a few degrees. What I do think now is that I don't have a leak!
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