does UPF-44 use nitrile or silicone ADBV

[Ross]

I have been reading lots of good things about the
ac delco UPF-44 here on the forum. Suppose to flow better than a wix and filter down to a smaller micron rating too!

The 51042 wix filter that I cut open had a nice bright orange ADBV. What type does the UPF-44 use? Does it really mater? I am looking for a good flowing filter on cold start ups with a good ADBV.

I could have sworn that the original AC Delco oil filter that I took of my new 1500 HD 6.0 truck had a orange ADBV. I started to use hastings filter(nitrile adbv) but was getting some unwanted startup noice on cold start, below 20 degrees. I switched to the wix filter and the noise is much better but still there. It starts 5 seconds after starting the truck and last for about 40 seconds. It does not do it above 20 degrees. It is more of a knock then tick.

Hoping that it's not CSK related!!!

Thanks for any filter advice you can give me.
Ross

 

[sbc350gearhead]

I am using the UPF 1218 on my truck, and it has a nitrile ADBV, so I would imagine that all the upf's have the same valve, but I can't swear to it.

 

[Alex D]

All UPF filters still use nitrile ADBVs
The only difference is that the gasket is teflon coated so it does not stick to metal surfaces. No silicon on UPFs

 

[Ross]

I just ordered 6 from gmpartsdirect. With shipping the price came to $7 per filter. I plan on using these and wix for my truck, and wix for everything else.