Hi Rick,
You have been systematic about this.
Good question about the opening of the new â??stat. As far as I know, they
either open completely or not at all. Others may know for sure.
Sounds like you did all the right things with your efforts to clean the
radiator. I still wonder if it had sediment that solidified during the time
the car was not in service. Was that a long time? Antifreeze in the radiator
then?
Check the side-to-side temps of radiator. If the sides and centre are not
close in temp, I would suspect blockage in the sides.
Why the electric fan? My MGB with its yellow plastic fan was happy year
round in Sarasota, admittedly not the heat of Houston, but I never had any
worries.
Is fan turning the right direction? I have heard about that but never seen
it.
Bob
> On Jan 30, 2021, at 6:38 PM, rolindsay@yahoo.com wrote:
>
> Hi Bob,
> Thanks for the kind words, considered thoughts, and recommendations. I
> quote (most of) your words here so as to not miss any salient points.
>
> > Those of us shivering at 9 degrees this morning, with a wind
> > blowing, almost wish we had your problem.
>
> LOL! I may be saying the same thing to you in 6 months, if with 90 degrees
> added to your 9!
>
> > Same temp at radiator neck and â??stat housing suggests
> > that the thermostat is working, though if you have any
> > doubt about it and do not know its age, you might consider
> > replacing it anyway.
>
> I agree, but at what flow level? Perhaps the thermostat, which is new, may
> be not opening fully. If restricting flow, the temperatures before and after
> the thermostat might equilibrate but without enough coolant flow to keep up
> with the engine's waste heat.
>
> > Were you able to measure top/bottom, left/right the
> > radiator core temperature?
>
> Yes, but I didn't record the temperatures. I just verified that the bottom
> if the radiator was cooler than the top.
>
> > If temp does not reduce from top to bottom, or there are
> > different temps at the same distance down from top,
> > you could suspect the radiator.
>
> I will examine further. When restoring the car I cleaned the radiator,
> inside and out, and straightened any bent 'fins'. I back-flushed the radiator
> with hose water then once the rinse water 'ran clear', I flushed it forward.
> Outside I sprayed the fins from both sides, with SimpleGreen then flushed it
> clean, back to front, with the water hose sprayer, again until the wash water
> ran clean.
>
> > I have not had stellar success with radiator cleaning products.
> > My recommendation is to take it to a radiator shop and have it
> > cleaned and serviced.
>
> See above.
>
> > What do you know about this water pump?
>
> It is new.
>
> > If, when your bring up engine temp from cold, with the rad cap
> > off, you do not see some swirling in top of the radiator, the water
> > pump is suspect.
>
> Will check, even though it is new (or perhaps rebuilt in China).
>
> Rick
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