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Discussion Starter #1
Just ordered up a new Silla all aluminum radiator (2396AA) and a new AC Delco professional waterpump (252-700) for my 96 Impala. Hopefully I have better luck with each one lasting more than 3 1/2 years without leaking. I'm going to keep the old waterpump to modify for future use with a Meziere HD electric pump.
 

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Just ordered up a new Silla all aluminum radiator (2396AA) and a new AC Delco professional waterpump (252-700) for my 96 Impala. Hopefully I have better luck with each one lasting more than 3 1/2 years without leaking. I'm going to keep the old waterpump to modify for future use with a Meziere HD electric pump.
Have the same WP and so far so good.

I would recommend that you flush the block (remove knock sensors) and Heater Core while the system is down and consider adding a drain hose to the bottom of the water pump. Also a good idea to replace the Plastic Tee and Restrictor since they get brittle with age/heat and new Tstat while your at it. Sorry, I love spending OP's money. :laugh:
 

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Discussion Starter #3 (Edited)
Heater core is new as is the front and rear heater hose assemblies that I purchased from Hamilton Chevrolet. T-stat is also new. Already did the "drip hose" mod on the current pump and will be doing it again on the replacement pump as well. I am going to replace the expansion tank this time around as well since the low coolant level sensor stopped working and I hate having something that doesn't work.
 

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Discussion Starter #4
Finally had a chance to replace the radiator and water pump this weekend. I did the job yesterday but ran into an issue with the Silla radiator, BOTH hose nipples were .075" smaller than they should be which meant that the original constant pressure clamps couldn't keep the hose tight enough on the nipples so they leaked when I started putting coolant in the radiator. It was very close to closing time for the local auto parts store so I ran over and bought some standard threaded hose clamps instead. Got back to finishing things up this morning when I ran into my next issue, the NEW AC Delco water pump leaked faster from the weep hole than the 3 1/2 year old pump I was replacing. I had to drive 40 miles round trip to purchase another AC Delco pump and then proceed to replace it again along with the cooland I had just put in.

Other than the nipple sizing being off on the Silla radiator i'm very impressed with the rest of the quality of the radiator. That sure was minor in comparison to having to replace the NEW water pump that I had just installed.
 
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