Not to open the " what's the right filter discussion", how many rely on the filter minder gauge to replace the filter. Mine is reading 12", at what reading do you change it.
I look at ours when I check the oil. Each engine manufacturer has a different restriction limit. Damp conditions may cause it to read higher. Especially true on U300/U280 with the air filter inlet behind the rear wheels. Here it is:
Pierce.
The air filter inlet is behind the rear tires ?? Seems as though ours is up above by the camera.
Bob,
I think your '95 GV has the same rear cap arrangement (with high-up air intake) as the Unicoach models that followed it. That, plus the larger front hatch opening and the retarder, are but a few of the design advantages to your unique "crossover" model. Be happy that you got a rare one!
As important as is the current reading, I like to record the initial restriction after replacing the air filter. Then I monitor how it increases.
Also, be aware that these are made of paper and glue. So replacing every 3 years or so is a VERY good idea.
Remember, if there is a tear in a pleat the air filter minder will NOT show it, as the tear lowers restriction. Replacing on a timely basis is sure less expensive than repairing a "dusted" engine.
And, has been covered in another thread, but bears repeating, direction of air flow is critical in choosing the correct filter. Filters can have exactly the same dimensions, but be designed for either "outside to inside" or "inside to outside" air flow. Yes, some are bi-directional.
Brett,
Your opinion on the "Donaldson Blue" filters?
Are they worth the extra $$$?
Justin
Not sure about Brett,worth it to me.
Not Brett, but here's a thread where the subject of air filters was discussed in depth...some would say "to death".
Quite a bit of chat about the Blue filters. Don't remember if there was ever a consensus on value versus cost...I fell asleep half way through.
Possible water in air filter? (http://www.foreforums.com/index.php?topic=30332.0)
The air filter intake location on many GVs could not be possibly worse. Check to see where your air cleaner gets it's air from. If it's down behind the rear wheels, consider a modification like Foretravel did to their later GVs. With the behind the wheel location, moist air from wet roads will be sucked in along with leaves, twigs, etc and may cause the glue to deteriorate. Never install a K&N filter.
Pierce
Our intake (95) is up at the rear camera
location. EXCEPT for a slight mod by a PO, see photo below.
Is the mod for general engine compartment cooling or something else?
No, it's actually the air intake for the turbo. It's cut into the air box that is used to "offset" the air duct from the outside corner of the coach above the tail lights to a more inward position to line up with the vertical air separator before going to the horizontal filter housing.
I have some pics posted somewhere here on the forum from last year. I had to modify the PO's version because he had no provisions to keep out water and debris.
It's all good now! :)
Yours may be as there were a lot of changes to the 1995 model. 1994 also had the good modification (but not up by the camera) as well as some 1993 models. You have the slick monster engine door as well as the large opening on the front end. Really nice coach.
Pierce
I am not sure I am a fan of the side air scoop feeding the engine air intake system.
Can just picture driving in a rain storm and amount of water working its way along the whole side of the coach and into that scoop. Can see it overwhelming the small "duckbill valve".
I have modified it so water cant flow down the intake, intake pipe is raised several inches above the floor of the box. Also the bottom of the cutout for the box is higher than the bottom of the intake scoop. You are correct though...... the way it was before my modification, any water that could enter the box, could get down to the air separator.
Not sure if this intake helps the turbo or not but in my opinion the air going in is cleaner than it would be from the original location because of the backdraft created by the coach lifting up dust and debris.