In a message dated 97-05-21 09:16:24 EDT, you write:
<< I have been told that I need to plug up the bypass hose on my '65 TR4
when I replace the current thermostat with a new one. Apparently, the
water flows too fast and does not provide adequate cooling.
Can anyone explain this and also(more importantly) can anyone comment on
how to plug this hose. Is it the hose that gets plugged or maybe the
thermostat housing or some other do-dad.
The problem is that the bypass hose allows coolant to by-pass the radiator,
and go directly back into the engine- great for warm up, but not so good
thereafter. The old style "skirted" thermostat blocked off the by-pass when
it opened, the new ones don't. If you don't have a skirted thermostat, block
the by-pass. I believe a 3/8" NPT tap will fit into the hole that the hose
connects to at the far end from the thermostat housing. Thread it and insert
a threaded plug, which you can then remove when and if you get the right
thermostat. Some suggest drilling a 1/8 hole in the tap, to avoid vapor
lock- probably a good idea.
>>Also, is there a funky way of pulling the valve cover that I am not aware
of? I removed the two bolts and washers but am having a difficult time
lifting off the cover. I do not want to try and pry it off and I'm
afraid to rap it lightly with a rubber mallot. Any advice?
Yeah- tap it with a rubber mallet. Your DPO glued the thing together
becasuse he was sick of the leaks, and didn't follow the rule that you have
to replace the cork gasket every time you lift the cover. You can get
neoprene gasket from Fel Pro, and someone on the list is making a silicone
one that should be available soon.
>> As a follow up on my previous radiator problem, I went to a dedicated
radiator shop and had my leaky radiator boiled, fixed and painted. They
also did my heater core. Both were done for $65 total.
>>
Great Price!
Paul
|