Visit our BAC Favorite Places Web Page

Author Topic: Engine air filter  (Read 1725 times)

Gary Merrifield

  • Lost Again
  • BAC Member
  • *
  • Posts: 66
  • Thanked: 10 times
  • 1-970-560-7744
Engine air filter
« on: March 07, 2019, 12:58:58 PM »
Has anyone changed their engine air filter from the one piece disposable to a convention one where you just change the elements?
Gary &Stacy
2006 Patriot Thunder
525 Cat

Gerald Farris

  • Past President
  • Board Moderator
  • *
  • Posts: 2006
  • Thanked: 717 times
    • Farris Journey Across The USA
Re: Engine air filter
« Reply #1 on: March 07, 2019, 02:37:58 PM »
Gary,
Changing your air filter to a disposable cartage design is posable but not practical because the cost in rerouting and replacing the intake tubing. The most common air filter change on your coach is to replace the undersized filter that Monaco installed on it with the one that was used on the C15 Marquis in 2007. That filter is larger, flows more air with less restriction, will last longer without setting the filter minder, and it will fit your current location and tubing.

Gerald   
2002 Solitaire (2017 -  )
2000 Marquis, C12 (2004 - 2017)
1993 Patriot  (2000-2004)

Bill Lampkin

  • BAC Member
  • *
  • Posts: 280
  • Thanked: 65 times
Re: Engine air filter
« Reply #2 on: March 07, 2019, 02:58:45 PM »
Gerald, Do you have a part # for that c15 filter? My filter minder always reads high, even with a new filter.
Thanks!
2005 Patriot Thunder Lexington, 3 slides
40' tag axle (short wheelbase)
525 hp C13

Gary Merrifield

  • Lost Again
  • BAC Member
  • *
  • Posts: 66
  • Thanked: 10 times
  • 1-970-560-7744
Re: Engine air filter
« Reply #3 on: March 07, 2019, 05:18:36 PM »
Yes what is the part number
Gary &Stacy
2006 Patriot Thunder
525 Cat

Scott Shearer

  • BAC Member
  • *
  • Posts: 24
  • Thanked: 8 times
Re: Engine air filter
« Reply #4 on: March 07, 2019, 05:53:15 PM »
The C15 filter does make a difference on the filter gauge.

Filter:
Simply Filter
Fleetguard Air Housing AH8505
$179.10 - free shipping
https://www.simplyfilter.com/ah8505-fleetguard-air-housing-p/ah8505.htm

Brackets:
Reliable Industries
71921-003 Farr Eco 13" mounting brackets $18.23 each
$36.46 + shipping
https://store.reliableindustries.com/filtration-products/71921-003-farr-eco-13-mounting-bracket-13-id/


« Last Edit: March 07, 2019, 06:09:44 PM by Scott Shearer »
Scott

2006 Patriot Thunder
Lexington IV 40'
Cat C13
2015 JKU Hard Rock
The following users thanked this post: Gary Merrifield

Mike Shumack

  • BAC Member
  • *
  • Posts: 986
  • Thanked: 243 times
  • Orlando, Florida
Re: Engine air filter
« Reply #5 on: March 07, 2019, 07:08:44 PM »
Thanks for the info. This may be a worthwhile upgrade for my '05 Patriot too. If if will fit.

On the Patriot the filter sits parallel to the coach's curbside sort of above the hydraulic tank (not across the rear opening as in the photo).
The filter number you provided crosses to a Donaldson P537449 (specs are 7" inlet/outlet, 13.5" dia body, length 24", 1501 cfm).

The stock Patriot Thunder filter is a Donaldson P537448 (7" inlet/outlet, 11" dia body. 24 " length, 1201 cfm) .

So only the body diameter is different, but the bigger brother filter flows 300 cfm more. I hope I can find an extra three inches of clearance.
- Mike

'05 Beaver Patriot Thunder, Vicksburg, CAT C13  525HP, Allison 4000MH, HydraLift

Al Anderson

  • 2002 Beaver Marquis
  • BAC Member
  • *
  • Posts: 18
  • Thanked: 14 times
Re: Engine air filter
« Reply #6 on: March 07, 2019, 08:20:17 PM »
On my 2002 Marques with a C12 I installed a K&N Filter and my reminder has never moved.  With the Donaldson filter my filter reminder would jump up to half way mark as soon as I did a full throttle run for any period of time.  The K&N also seems to climb the 8% grade near my house about 2 mile per hour faster.  Here is the information from Amazon on it:
K&N 38-2012S Washable & Reusable Heavy Duty Replacement Air Filter - Replaces RS3518, 88556, EAF5069, P527682, FA3518, AF25139M, CA7140, AF2120, LAF1849, 6556, A74700, 46556

I paid $184.99 and it is supposed to be washable with a hose, no oil required like most K&Ns.
Al Anderson, 2002 Beaver Marquis, 42 Feet Long
Cat C12 505 HP
2 Slides with a Tag Axle
2013 Wrangler 4 Door
The following users thanked this post: Dwight Lakusta

Scott Shearer

  • BAC Member
  • *
  • Posts: 24
  • Thanked: 8 times
Re: Engine air filter
« Reply #7 on: March 07, 2019, 09:07:26 PM »
Mike,

As you noted, there is a significant difference in the air intake design between the 2005 and 2006 Thunder. I have seen several posts on the internet discussing design improvements related to the 2005 Thunder model year.
Scott

2006 Patriot Thunder
Lexington IV 40'
Cat C13
2015 JKU Hard Rock

Bill Lampkin

  • BAC Member
  • *
  • Posts: 280
  • Thanked: 65 times
Re: Engine air filter
« Reply #8 on: March 07, 2019, 09:21:27 PM »
Anything to try to move my mpg up from the 5.5 that I get now .......!
2005 Patriot Thunder Lexington, 3 slides
40' tag axle (short wheelbase)
525 hp C13

Steve Huber Co-Admin

  • Administrator Group
  • *
  • Posts: 2139
  • Thanked: 1256 times
Re: Engine air filter
« Reply #9 on: March 07, 2019, 10:05:12 PM »
Al,
If your indicator isn't moving over time, it's because the filter isn't collecting particles. Guess where they are going... IMHO a K&N type filter that supposedly works better as it traps more particles is letting particles through. The supposed savings in power, etc. are not worth the possible engine repair costs. Just my opinion.
Steve
Steve
2015-          07 Contessa Bayshore C9,  400 hp
2013-2015: 00 Marquis Tourmaline, C12, 425 hp
2005-2013: 01 Contessa Naples, 3126B, 330 hp

Frank Bergamo

  • BAC Member
  • *
  • Posts: 94
  • Thanked: 14 times
Re: Engine air filter
« Reply #10 on: March 07, 2019, 10:51:36 PM »
Al,
I am with Steve concerning your K&N filter. You will get more air into system, witch will give you more HP, but at what cost $$$ in relation to dusting a motor. I would not run anything other than a good, stock air cleaner. Donaldson, Fleetguard, are two that come to mind. Hope this helps.
Frank & Paulette Bergamo
2019-       : 2007 Marquis Topaz IV  C-15 600 HP Allison 4000
2014-2019: 2002 Marquis Emerald C-12 505 HP Allison 4000
2004-2014: 1986 Executive Diplomat 3208 250 HP Allison MT-643
Grand Junction, CO.

Dwight Lakusta

  • BAC Member
  • *
  • Posts: 76
  • Thanked: 9 times
  • 2003 Marquis Ruby, C-12, 505HP
Re: Engine air filter
« Reply #11 on: March 08, 2019, 02:28:27 PM »
I spoke with my buddy who is a CAT mechanic, he said never even say the word K&N and CAT in the same scentence!  He said never install one....ever!
2003 Beaver Marquis Ruby 40, 3 slides, C12, 505HP. Current unit.
2008 Newmar Dutch Star, 40, 4 slides, 8.9 ISL, 400HP.
2000 Monaco Windsor, 40, 2 slide, 8.3 ISC, 330HP.

Gerald Farris

  • Past President
  • Board Moderator
  • *
  • Posts: 2006
  • Thanked: 717 times
    • Farris Journey Across The USA
Re: Engine air filter
« Reply #12 on: March 08, 2019, 03:11:15 PM »
I agree with Steve and the other post in that a K&N air filter is not an air filter, it is an air strainer at best. I would install used underwear over my air intake before a K&N filter.

Gerald   
2002 Solitaire (2017 -  )
2000 Marquis, C12 (2004 - 2017)
1993 Patriot  (2000-2004)

Paul Aronson

  • BAC Member
  • *
  • Posts: 32
  • Thanked: 8 times
Re: Engine air filter
« Reply #13 on: March 08, 2019, 10:21:35 PM »
2007 Beaver Patriot Thunder Winchester III
45' C-13 525 Hp
2013 Chevy Traverse

Gary Merrifield

  • Lost Again
  • BAC Member
  • *
  • Posts: 66
  • Thanked: 10 times
  • 1-970-560-7744
Re: Engine air filter
« Reply #14 on: March 09, 2019, 12:02:30 PM »
Again a Big Thank you to everyone
Gary &Stacy
2006 Patriot Thunder
525 Cat