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GMC V6 and V12 Engines Engine repair and rebuilding

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  #11  
Old September 10th, 2017, 07:56 PM
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Quigley Quigley is offline
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Default Re: Calling all Air Cleaners

1966 305E Original Air Cleaner.
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  #12  
Old September 11th, 2017, 04:19 AM
bigblockv6 bigblockv6 is offline
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Default Re: Calling all Air Cleaners

[QUOTE=bigblockv6;67913]
Quote:
Originally Posted by AZKen View Post
Great pictures! Did not realize the oil bath went into 65.

Yes, the oil bath continued on 4wd V6 models up to 68-69, my 68 K2500 came with the same one Ed's 65 Suburban has which was made by Donaldson. I'll dig up the build sheet this coming weekend and list the RPO code. I replaced the air cleaner with an open type in 1975 when I did the Holley conversion.
As promised the RPO code on the build sheet to my 68 GMC for the air cleaner is K-48
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  #13  
Old September 24th, 2017, 07:43 PM
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Default Re: Calling all Air Cleaners

keep them coming. Thanks everybody.
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  #14  
Old September 30th, 2017, 12:21 AM
yeshua63043 yeshua63043 is offline
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Default Re: Calling all Air Cleaners



Here's my '61 oil filled. V6

(sorry about pic size)
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  #15  
Old April 28th, 2019, 03:05 AM
Bruno Bruno is offline
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Default Re: Calling all Air Cleaners

This oil bath is on my 62 1500 with a 305 V6. I wonder is someone welded the tube on the top to accept the hose from the breather tube.
Love Bruce
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  #16  
Old April 28th, 2019, 03:25 AM
bigblockv6 bigblockv6 is offline
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Default Re: Calling all Air Cleaners

My 68 came from the factory with the same air cleaner which is a Donaldson air cleaner. I would say the tube was welded on, mine has a hole with a grommet on the bottom of the air cleaner for the breather tube to fit into. Looks like someone added a PCV into the valve cover of your 62.

Last edited by bigblockv6; April 28th, 2019 at 04:35 AM.
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  #17  
Old April 28th, 2019, 02:19 PM
POWERSTROKE POWERSTROKE is offline
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Default Re: Calling all Air Cleaners

This will NOT be a popular post to this topic. But, a properly engineered and serviced dry pleated paper air filter will filter out 99% of the dust/dirt before it enters your engine. A oiled cotton gauze filter, aka K&N or equivalent seldom get over 95% of the dirt. They are designed to be used on engines in off-road race car or truck or motorcycle engines. They were were designed so the thick film of oiled dirt would fall off the surface of the filter so the filter does not restrict air flow Into the engine. The increased dirt the engine didn't matter since the engine only runs a maximum of 500 to 1000 miles between rebuilds.

Now, if you don't have an open mind, stop reading this post right now. I've spent hours and hours researching published efficiency ratings by oil bath air filter manufacturers. Nobody prints them. The companies ALL print dry pleated paper filter element spec's, and oiled cotton gauze specs. The best info I have found is from VORTOX Air Technology, they claim "Up to 80% removal of dust/dirt" with their oil bath filters. I don't think anything comes with oil bath filters anymore. They don't work well with turbo-charged engines, huge self-propelled combines harvesting corn, soybeans, small grain crops like wheat, oats, barley, etc operate in choking clouds of dust, huge two stage, filter inside a filter, dry pleated paper filters need to be cleaned, serviced, replaced daily, sometimes twice a day. Oil bath air filters would not work. My two IH Farmall tractors, a '51 and '54 vintage both have Donaldson oil bath filters and I'm switching them both over to dry pleated paper filters someday when I find the right filter housing.

If I had a V-6 in good shape I'd have a paper filter on it. They were used 50 years ago because we didn't have anything better. Now we do. So, those of you that didn't heed my warning, Flame away like all the old farmers on the other forums I post on just because their brand new 1940 vintage tractor had an oil bath air cleaner, "They gotta be good". No, they don't!
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  #18  
Old April 28th, 2019, 10:26 PM
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LEWISMATKIN LEWISMATKIN is offline
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Smile Re: Calling all Air Cleaners

powerstroke, this topic has been discussed thouroughly in past posts. Paper filters, if high quality, do a great job of filtering air when maintained properly. I have worked on and aquired parts for both turbocharged Cummins and Detroit diesel and Mack engines. I can unequivocally can state that on most engines, due to their maintence (or lack there of) that I have come across, would have or are benefitting from the oil-bath filters. Yes, they are messy. Yes, they may restrict air flow more than most dry-type filters. But in the engines I personally seen, whether Cummins, DDA, Mack, or h/d gasoline, valve guide/stem and upper cylinder wear was considerablely less than on engines equipped with dry-type filters. I propose that only frequent and proper maintence of any air filter(dry,oil-bath,oil-wetted) is the only sure and true way to protect any engine upon which they are on. This is only my humble opinion, and am not wanting to start this argument afresh. My dad and grandad who had a GMC dealership in Cullman, Ala. during the production run of this series of engine would not order a truck unless it had both an oil-bath air cleaner and a canister oil filter, even thou dry type filters were a RPO during this time.
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Last edited by LEWISMATKIN; April 28th, 2019 at 10:39 PM. Reason: additional info from family history
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  #19  
Old October 25th, 2019, 02:24 PM
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Default Re: Calling all Air Cleaners

Great thread, thanks I learned a lot here.
Steve
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  #20  
Old July 8th, 2020, 02:50 PM
Ccsmith Ccsmith is offline
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Default Re: Calling all Air Cleaners


65 gmc 305e v6 original oil bath filter. I see there is some debate about oil vs paper. I currently have oil in it but have heard of guys modifying the oil filter housing to accommodate a paper filter. Does anyone know what paper filter will fit properly if i cut out the steel mesh from the top housing?


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