Check your Napa expansion valves - The 1947 - Present Chevrolet & GMC Truck Message Board Network

MLB57 · 07-25-2013, 09:38 PM

I got a new expansion valve from napa and after installing it and freezing up found that the inlet port was not machined right. They brought in 3 more before we got one that was bored all the way. at the bottom of the bore the hole was only about a 1/8 inch. If anyone wants pictures I will try to get it done this weekend. It was a 4 seasons valve

airdale94 · 07-25-2013, 10:11 PM

I had a cycling switch fail after I converted my 93 to R134A. It was from NAPA also 4Seasons.

07-25-2013, 09:38 PM	#1
MLB57 Registered User Join Date: Sep 2011 Location: olathe kansas Posts: 238	Check your Napa expansion valves I got a new expansion valve from napa and after installing it and freezing up found that the inlet port was not machined right. They brought in 3 more before we got one that was bored all the way. at the bottom of the bore the hole was only about a 1/8 inch. If anyone wants pictures I will try to get it done this weekend. It was a 4 seasons valve

07-25-2013, 10:11 PM	#2
airdale94 Registered User Join Date: Jan 2007 Location: Topeka,KS Posts: 778	Re: Check your Napa expansion valves I had a cycling switch fail after I converted my 93 to R134A. It was from NAPA also 4Seasons. __________________ 68' C20. 283CI w/55CC 305HO heads, NP435 Close Ratio, Corp. 14 bolt FF 3.21, 75' front end swap (everything but the X-member).



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