Don,t Assume, Verify, New Parts Do Fail

Grumpy

The Grumpy Grease Monkey mechanical engineer.
Staff member
I was asked to look at a friends 1996 corvette that recently started over heating,
this is rather common on older c4 corvettes,
this over heating issue in a c4 corvette,
is frequently caused by a defective sensor or fan relay,

so I figured it was a sensor a relay a blown fuse or the fans.
so I started checking all of those common issues

especially after he told me he had recently replaced the water pump,

I traced the problem to a defective water pump, as no coolant circulated in the radiator with the engine running and radiator cap off,
even with the t-stat temporarily removed,
much to the amazement of the owner of the corvette as he had just paid a local dealership to replace the water pump about 8 months prior,
we got a new replacement pump from the local NAPA and once the water pump was replaced all was again ok,
the semi-recently installed pumps impeller was sloppy loose on inspection,
it looked like a cheap imported pump that had been rebuilt badly

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lt1fansen.jpg

lt1dipump01.jpg

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related threads

http://garage.grumpysperformance.com/index.php?threads/cooling-off-that-c4-corvette.3954/

http://garage.grumpysperformance.com/index.php?threads/that-c4-corvette-cooling-fans-issue.16049/


http://garage.grumpysperformance.com/index.php?threads/cooling-issue.13389/#post-96301

http://garage.grumpysperformance.co...g-off-that-c4-corvette.3954/page-2#post-91804

http://garage.grumpysperformance.com/index.php?threads/1995-corvette-fan-motor-quit-working.10559/

http://garage.grumpysperformance.com/index.php?threads/cooling-issue.13389/#post-96300

http://garage.grumpysperformance.com/index.php?threads/i-need-a-new-lt1-water-pump.10723/#post-80046

http://garage.grumpysperformance.com/index.php?threads/c4-c5-corvette-trouble-codes.2697/

http://garage.grumpysperformance.co...lay-switch-locations-and-info.728/#post-93194
 
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