[V8] Overheating - revisited

Dave Head v8q at bellsouth.net
Sat Jun 17 09:22:47 EDT 2006

Having had a few V8s in the family over the nearly 10 years (4 - red, 
green, blue and white), the major reason here is a partially blocked 
radiator. Period. The problem is poor design coupled with poor 
maintenance. The poor design is the smaller electric fan beside the 
large clutch fan - this causes high and low temperature spots both 
vertically and horizontally across a crossflow. The poor maintenance is 
due to not maintaning the proper coolant/coolant levels.
I've seen them partially clog in as little as 4 years. It usually takes 10.
Yes, there is the rare problem with a viscous fan clutch, or a 
thermostat, or a fan speed issue. Once even excessive erosion of the 
water pump vanes.

But relatively normal temps at highway speeds coupled with overheating 
in town are nearly always the radiator on a V8.

Mike Del Tergo wrote:

>all fans are not operating as they should or the airflow over the rad would 
>be suffucient to cool the car if it is OK on the hwy, when in stop and go.  
>If OK on the hwy then water pump/tstat/and rad are OK. What changes when 
>stopped?  Air flow, which the fan is supposed to compensate for and 
>apparently is not.  Could be clutch, as alsways with this car check replace 
>the 80 amp connection as well.
>Scott Baumann / PTS Power scott at ptspower.com
>  All fans operate as they should (checked all of that out).  This is my 
>third summer I am facing with these issues.  I am seriously considering 
>parking this V8 for the summer and only using it for a cold weather car (85% 
>of days here in Wisconsin anyway).  Any ideas??
>Scott B in WI
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