[rheavn]

Now you have confused me. Why do you want a filter with no SCA pellets? I have been using a NAPA #4074 or DD 23507189. I believe both have sca pellets in them. I've used filters with SCA pellets now for 12 years on two different engines, tested regularly and never had to add SCA.

When I change coolant I bring it up to temp with the DASH heater on all the way. I cycle it up to temp several times on my 5 mile test route. I've added coolant as needed and never had a problem with trapped air.

On my coach there are petcocks on the filter in & out hose. Close the petcock on the filter in hose and change the filter. DON'T FORGET TO REOPEN THE PETCOCK!!!