Dave, it may be that your radiator cap is old and not capable of
maintaining the 13 psi pressure it is supposed to. If it is, suggest you
get a new cap and repeat your puke tests.
Bob
On Fri, 3 Jul 1998 21:11:08 -0700 Dave Binkley <dbinkley@argotech.com>
writes:
>I've had my Tiger for 6 months and 700 miles so far and have watched
>the
>list talk about Tiger's puking coolant. Have felt real secure in the
>observation that so far I haven't seen the temp gauge go north of 180
>so
>far through a wide range of driving conditions. Last Monday morning
>the
>guage hit 205 after a 20 minute freeway run at 70 mph (outside air
>temp
>was a cool 50 degrees - fog in the bay area), but cooled down to 170
>after getting off of the freeway and driving through town. Tuesday
>night it did the same thing when I brought the car home. Odd.
>
>This afternoon I checked the coolant tank and it was low so I added
>water to the half way mark. Even checked it with a popcicle stick.
>Took the car up the freeway 10 miles and back at 70 mph, took it
>awhile
>but it did go up to 200 on the gauge. As I was pulling into the
>garage
>at home, the car let out a howl and dumped most of the coolant within
>about a minute. It was hard to determine exactly where it was coming
>from, the garage was dark, and I wasn't real thrilled about sticking
>my
>head down in all that steam and hissing. It was definitely coming
>from
>somewhere below or near the water pump and stopped once the level got
>down to wherever it was leaking from. I was late and had to run to
>dinner with my wife so left the car to cool down.
>
>Just got home, checked things over with the flashlight and couldn't
>see
>anything obvious. Added some water, took about 3/4 gallon. Fired it
>up
>and went back up the freeway. Got it back to the house and shut down
>before it hit 200, but it was headed there. Everything was nice and
>dry
>- no obvious leaks.
>
>So, what's going on. 13 lb radiator cap on the coolant tank. Stock
>260. I figure either the thermostat is not opening or the water pump
>is
>shot. I can easily check the thermostat tomorrow morning. Is there
>an
>easy way to check out the water pump short of pulling it?
>
>Any other suggestions? Have not yet calibrated the gauge so not sure
>how accurate it is. But, if it is reasonably accurate, this shouldn't
>happen at 205 - 210 should it.
>
>Thanks for the help.
>
>Dave
>
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