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#1 |
Registered User
Join Date: May 2009
Location: Lincoln, NE
Posts: 322
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Oil Bath Breather
Was curious as to where I could find information on how to change my oil on my 67. It's got a 327 with the Oil bath still on it. I've looked online with only the ability to find out how to change regular oil filters and air filters. Thanks!
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#2 |
Hollister Road Co.
Join Date: Apr 2005
Location: Houston
Posts: 6,134
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Re: Oil Bath Breather
oil bath filters are either 2 piece or 3 piece. Take the center wingnut off and seperate the halfs remove the lower have from the carb dump the oil and refil to the line then assemble the halfs . I'm supprised to see a oil bath on that late of a truck. post a picture of it.
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#3 |
What?
Join Date: Jun 2007
Location: Southern California
Posts: 7,617
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Re: Oil Bath Breather
My 68 came with an oil bath air cleaner.
Back when I ran the oil bath on the burb, I would dump out the old dirty oil then clean out the housing with a solvent. Pay special attention to the base of your bath, since that is where most of the dirt will settle. There was an element that would stay soaked with oil, this is basically your dust and dirt catcher so this has to be cleaned as well. I would back in the day just soak it in a pan of gasoline, but I'm sure there is a safer and better way of doing this now. None the less you want that screen to be as clean as possible. Once you have it all clean, just refill it with a 30wt or something similar to the fill line. I would also soak the screen seperately to make sure it was completley covered in oil. The connector that breaths from the valve cover to the stack, I just would shoot carb cleaner though it and try to shake out any gunk left in it. I may be totally off on this, since the last time I did this was - uh 20+ years ago.
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Chris 1968 K20 Suburban 1972 K10 LWB PU Last edited by vectorit; 08-28-2009 at 03:13 AM. |
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#4 |
Account Suspended
Join Date: Jul 2006
Location: DFW
Posts: 1,427
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Re: Oil Bath Breather
As dwcsr said, but you probably want to clean all the bits as well.
You might measure the carb diameter where the filter sits, and troll the scrapyards for a paper type element filter assembly. Note the info on the vehicle so you can get a replacement element. The paper filters are supposed to be much better at keeping the small rocks out of the motor. Snag the wing nut and stud too... Last edited by 72lb4x4; 08-28-2009 at 03:05 AM. |
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#5 |
Registered User
Join Date: May 2009
Location: Lincoln, NE
Posts: 322
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Re: Oil Bath Breather
But for the rest of it, unscrew the plug down at the bottom and drain the oil then cap it back on then poor the oil in as usual?
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#6 |
Registered User
Join Date: Dec 2006
Location: Porter Ranch, CA
Posts: 978
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Re: Oil Bath Breather
Does anybody know how well these things breathe as compared to an open element? Are they very restrictive? I tossed my out the door about 5 minutes after I bought the truck. For the novelty of it, I kind of wish I would have kept it.
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#7 |
Registered User
Join Date: Dec 2001
Location: harvard, il. USA
Posts: 389
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Re: Oil Bath Breather
I have no idea about oil bath filters on our trucks, but I do have an oil bath filter on my 45 ford tractor. Oil bath are supposed to be a better filter than any paper filter, related to clean air. I've been told they are no more restrictive than a paper filter.
HTH....don t. .... |
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#8 |
What?
Join Date: Jun 2007
Location: Southern California
Posts: 7,617
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Re: Oil Bath Breather
Personally I'd like to learn more about it myself.
My burb came with one, and was actually an option on the SPID. I've heard they are best for extreme environments, where there is a lot of dirt and dust. I know back in the day they were probably the best thing, and today they are obsolete obviously. But I'd really like to use mine again, since it is original to the truck. But finding the screen element has been futile for me over the years, and I am always on the look out for one and if n when I find it the oil bath is going back on.
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Chris 1968 K20 Suburban 1972 K10 LWB PU |
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#9 | |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,621
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Re: Oil Bath Breather
Quote:
As vectorit said, be sure to clean out your air filter with solvent, they dry before refilling with fresh oil. And yes, oil bath air filters are supposed to be the best thing for extremely dirty environments. No clue how their flow rates compare with paper elements, but probably pretty well. They're just very messy to deal with and not worth the trouble for most of us. If it were mine, I'd replace it with a paper filter....
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#10 |
Registered User
Join Date: Dec 2001
Location: harvard, il. USA
Posts: 389
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Re: Oil Bath Breather
Vectorit....On the ford tractor, its just a metal mesh. Before I knew more, I used 3 stainless steel chore-boy scrubbing pads. I kinda stretched them out abit so they would fit.
If you stay on top of cleaning the oil in the filter, you should rarely haffta clean the mesh. The oil gets sucked up into the mesh, the crap gets stuck. When you shut down, gravity of the oil "should" flush the mesh of the debris. Caveat...like I said, I know nothing about o-b-filters on our trucks, but would think they logically work the same. HTH.....don t. ..... |
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#11 |
Registered User
Join Date: Jul 2009
Location: Russellville, Arkansas
Posts: 1,699
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Re: Oil Bath Breather
I think your supposed to use 70 or 80 weight oil per the owners manual. I'll check when I get home. I use my oil bath air cleaner on my 68 and it runs fine. Just fill up to the mark on the plastic ring that goes in the bottom.
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#12 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: Oil Bath Breather
the EPA is the main reason the oil bath went away. Paper is easier, but oil bath gets more dirt out. However, oil mist can, and does get in the incoming air and burns in the cylinder, causing more pollution than needed.
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#13 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,621
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Re: Oil Bath Breather
I was thinking we used cheap (recycled bulk) engine oil when I was a kid, but that's been about 45 years ago so.....
![]() Anyway a quick Google search came up with this: http://vintagetractorengineer.com/20...-for-tractors/ Use the correct grade (weight) of oil. If the oil is too heavy it will not be carried up by the air onto the packing material. Conversely, if the oil is either too light or the reservoir is too full then oil can be carried through the packing material and towards the engine. In petrol fuelled models this can enrich the fuel mixture in the carburettor and not only increase exhaust emissions of unburned hydrocarbons but also increase fuel consumption. Inspect the inside of the clean pipe for any traces of oil. If you cannot find the specification for the oil then as a general rule your system will usually be designed to use the same type of oil as the lubricating oil in the engine. In very cold conditions it may be necessary to use a lighter oil or dilute the oil with up to 25% paraffin to manipulate the oil viscosity.
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#14 |
Senior Member
![]() Join Date: Dec 2006
Location: Studio City, Calif.
Posts: 2,865
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Re: Oil Bath Breather
Here's what the '69 manual says;
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'69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, 2nd owner, Work-Truck supreme. Best $300 I ever spent. |
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#15 |
Registered User
Join Date: May 2009
Location: Lincoln, NE
Posts: 322
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Re: Oil Bath Breather
Wow, thanks for all of the information guys. Very nice of you to go above and beyond helping me out. Appreciate it very much!
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#16 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,621
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Re: Oil Bath Breather
Great forum, isn't it?
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#17 |
Registered User
Join Date: Aug 2007
Location: pittsburgh pa
Posts: 1,970
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Re: Oil Bath Breather
I like the look as well so heres what I did for the 54 GMC Im building... I cut all the oil bath junk out and bought a 6" air cleaner assy... I tacked the base for the new filter in the bottom of the oil bath can and the lid in the lid... Looks old but with a new filter inside... I might take a hole saw and put a few 2" holes in the back of the original oil bath housing for better air flow..
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68 C10 Shorty TPI,Bagged, and all the good stuff. Classic trucks feature June 06, On the cover of Jegs Christmas Catalog 08 67 C10 Shorty Shop truck project Bagged and Z'd under destruction and getting nowhere fast. 64 C10 Shop Truck/Daily driver, Bagged, Dropmember, SOLD!!!! Gone but not forgotten.. 54 GMC under the knife getting a S10 chassis swap and bagged. See my build thread... 07 GMC Sierra 5/7 drop, 22's and 24's Air ride on my mind.. http://67-72chevytrucks.com/vboard/s...d.php?t=339340 See pics of my trucks in my profile |
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#18 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,621
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That's a great idea, love the way it turned out!
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#19 |
Registered User
Join Date: May 2009
Location: Lincoln, NE
Posts: 322
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Re: Oil Bath Breather
Other question. Which "solvent" would be best used to soak the filter that's in the canister in? Also, can I use that same solvent to clean the insides of the canister? Thirdly and lastly, there's a very large canister on the bottom of the engine that looks like an overgrown oil filter, but with out unscrewing it and looking I'm sure it's some kind of internal filter.....as LMC offers a element that replaces the one inside of the canister. So, where would I get that element outside of ordering from LMC?
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#20 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,621
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Re: Oil Bath Breather
When I was a kid, we just used gasoline... not good I know, and I've never actually used proper solvent
![]() You used to able to buy drop-in filters at any parts store, too.... have you checked with them?
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#21 |
Registered User
Join Date: May 2009
Location: Lincoln, NE
Posts: 322
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Re: Oil Bath Breather
I stopped at NAPA and they gave me a regular filter to put inside the canister. As I've not looked at it yet I am not sure if this will work or not. He said I should be able to unbolt it and put the new one in the inside of it.
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#22 | |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,621
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Re: Oil Bath Breather
Quote:
And of course start the engine and check for leaks when you're done.
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#23 | |
Registered User
Join Date: May 2009
Location: Lincoln, NE
Posts: 322
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Re: Oil Bath Breather
Quote:
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#24 |
Registered User
Join Date: Jul 2009
Location: Russellville, Arkansas
Posts: 1,699
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Re: Oil Bath Breather
For about $20 you can get the conversion mount to use a satndard spin on oil filter. Most parts stores or Summit has them. Putting mine on today. Jim
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#25 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,621
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Re: Oil Bath Breather
Typical SBC oil change including filter will take 5 quarts.
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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