[DeTomaso] DeTomaso Digest, Vol 85, Issue 20-Pressure cap

[Dave Londry]

While I was fighting the coolant-in-the-crankcase war last year I got 
the cooling system up to 28 psi.
Had to tighten a couple of clamps along the way though.
(It's all new stainless and double clamped)
Then I only run a 13 psi cap - no issues.
dave

On 8/24/2011 10:59 AM, JDeRyke at aol.com wrote:
> In a message dated 8/23/11 5:20:01 PM, RCBSONS1 at aol.com writes:
>
>> I have a 22lb cap on my system that has new radiator, new ss tubes and
>> several water pumps...
>>
> Such high pressure caps stress the entire cooling system. They usually work
> if all-new components are added like Bob did. But if anyone is thinking of
> using caps over about 16 psi with OEM components, keep checking for leaks in
> the radiator, all the hoses, the tanks and especially the heater and its
> lines, as all will run at or close to that pressure.
> Of course, the heater core is inside the heater/AC box under the dash and
> requires a dash-pull to examine, so about all you can do there is check for
> coolant leaking out of the box. If you find any, the problem is too far gone
> to save for most. This does not mean condensate from the AC- look for green
> antifreeze stains. Manual cut-off valves will save the heater core but
> effectively prevents you from using heater or defrosters unless you unseal the
> big rad cap first..... Good luck- J Deryke
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