Anyone mess with it for an old 6.2L?

If you want to I have a few kits here, some are missing small parts. I will try to get the brand of them this weekend, they are upstairs in storage. You may need have a pickup to install these, I recall the units being rather large, I think they were originally for OTR trucks. i would make you a good deal on one.
brian.
Send me a PM or something first of next week, i will probably lose this thread by then:-)

Mastiff, I had a Harvard bypass filter on my 84 G20 with a 6.2. Ran it about 80K or better with the Harvard. I am going to install a Harvard on my GMC van wth a 6.2. I used a Model TA-71C oil filter. This is a spin-on filter, holds about 2 quarts. On the 84 I returned the oil into the oil pan. On this GMC I will drill and tap the block-off plate for the mechanical fuel pump and return the oil through that port. Mike

I have run the toilet paper version on 6.2/6.5's and installed an amsoil version for a customer's 6.2. Oil stays a little cleaner, but still gets black. I didn't feel good about extending the drain intervals based on the clarity, but I didn't sample either.:cool:

Mastiff, I had a Harvard bypass filter on my 84 G20 with a 6.2. Ran it about 80K or better with the Harvard. I am going to install a Harvard on my GMC van wth a 6.2. I used a Model TA-71C oil filter. This is a spin-on filter, holds about 2 quarts. On the 84 I returned the oil into the oil pan. On this GMC I will drill and tap the block-off plate for the mechanical fuel pump and return the oil through that port. Mike
Who sells the harvard units? I tried googling for them but didn't find any good sources.

I like the idea of running the return line into the top of the engine, like the filler cap ones I saw on another thread. The underside of my truck is pretty ugly and it'd be nice to keep stuff up top.

Fan, I have used Harvard filters a lot. They will filter down to 1 micron. Harvard filters work much like a TP filter, but with better material and presicion to ensure oil control. Diesel soot is made up of tiny particals and will turn the oil black. But that does not mean the oil is not in good shape and will not do it's job. I haven't had any expenerce with Ams Oil filter systems. I have used some Ams Oil products and believe they are very good quality products.

In larger engines, 855 Cummins and 3406 Cats, I have used regular oil analysis when using Harvard filters. On the smaller engines, 6.2 diesel, 318 Dodge, 390 Ford, 350 Chevy, I did not use analysis. With all these engines the oil drain intervals where not just extended, but eleminated. They were serviced regulary. The oil condition was checked and the regular oil filter changed. Just a regular service with out the drain and refill. Some new oil is added to replace what is lost wihen the regular oil filter is removed.

I have also used these filters to filter the fluid in my automatic transmissions and to filter hydraulic systems. To fully apperate what these filters can do with engine oil one needs to use regular oil analysis. With hydraulics and automatic transmissions the results of these filters are very visible. However analysis of these fluids are no less impressive. Mike

Don't put your by-pass oil filter return to the oil filler tube because the oil will go to your CDR valve and then into your intake manifold!!!!! Believe me it is a no-no. :(

Mastiff, go to harvardcorporation.com. Look for dealers. Returning to the fill tube will cause you all kinds of bad problems. Like another post has said. I've thought about returning it into the front cover, but I think this would be about like dumping it into the fill tube. Mike

Mastiff, go to harvardcorporation.com. Look for dealers. Returning to the fill tube will cause you all kinds of bad problems. Like another post has said. I've thought about returning it into the front cover, but I think this would be about like dumping it into the fill tube. Mike
I get nothing at www.harvardcorporation.com (http://www.harvardcorporation.com). Is that right?

Mastiff, sorry, it is harvardcorp.com. The company name is Harvard Corporation, they are located in Evansville, Wisconsin. I live in Iowa, have a dealer 5 miles away. Known him for a lot of years. If you can't find someone near you let me know and I will talk to him and I am sure he will get you fixed up. Mike

I dont know much about this topic, but was interesting to read. While looking for fuel filter mount information, came across by-pass oil filters from carquest so I thought I would list the information for anyone who is interested. Sounds like a good upgrade, might even do it myself one of these days.

Type/////////Carquest No.//WIX No.//Filter Height
Small base://89755//////////24755
filter:////////85050///////////51050/////5.178 <---GM Application
filter:////////85051///////////51051/////4.338
filter:////////85320///////////51320/////3.79

Large base://89750//////////24750
filter://///////85749//////////51749//////9.748

It seems like nobody is selling the actual thing to tap off a small amount of oil from the system, like at the filter base? Or is that the "base"? I was thinking the base was for the remote filter, if so, where do you get the stuff to tap off from the system in the first place? Obviously, I'm slightly confused.

You can tap into any place that has oil pressure. You can put a tee at the oil pressure sender, or usually there is a plug in the block near the oil filter. I have run Harvards for 25 years and they are a great product. I would want one bigger than a TA-71 on a diesel, perhaps if you want to stick with a spin-on, use the 125S. I have the 251 on my trucks, they hold 5 qts, and are cannister type. 251 has been discontinued, the 150 is 5 qt capacity, 152 holds 3 qts.

Website for Harvard is www.harvardfiltration.com

Any thoughts on Amsoil BMK-13? I like the simplicity of just adapting to the existing spot where the oil filter goes, then you mount a dual remote with one full flow and one bypass filter. I'm not sure if the Amsoil hardware locks you into the Amsoil filters too. I'm also kinda confused that they seem to have a one size fits all filter adapter - wouldn't the adapter have to have a gasket with the same diameter as the original oil filter?

I have used The TA-71 on several gas engines and the 6.2 in G20. A larger filter would have been nice but the van has a limited amout of room. That filter did fine on the 6.2. A larger filter would have allowed going more miles between changing the Harvard but 40K is plenty for me. Mike

This is on a similar topic. Anyone use the extra capacity main oil filter for the 6.2? information I found says is for 50-70 series trucks. holds 2 quarts. its 7.8" long, compaired to 5.1" for the standard. fram part no. PH373/ WIX no. 51794

maybe not as much, but wouldnt this do something simaliar to the dual filtration?
any thoughts on this?

TF, not the same at all. A Harvard will filter down to 1 micron, regular oil filters filter down to about 40 microns at best. Not that a larger filter isn't good. What make and number filter are you talking about to replace the Wix 51061? I use the port on the filter base of the 6.2 for pressure to the Harvard. On the 6.2 engine I have now I will drill and tap a port in the block-off plate where the mechanical fuel pump goes a return line. Mike

TF, not the same at all. A Harvard will filter down to 1 micron, regular oil filters filter down to about 40 microns at best. Not that a larger filter isn't good. What make and number filter are you talking about to replace the Wix 51061? I use the port on the filter base of the 6.2 for pressure to the Harvard. On the 6.2 engine I have now I will drill and tap a port in the block-off plate where the mechanical fuel pump goes a return line. Mike
slmoe, thanks for filling me in. dont know much about this but been considering it alot since reading this post. not sure how to do the plumbing really. i see the larger filter would not have the same results.

the wix 51061 would be replaced by wix 51794/fram ph373

you said that filter you mentioned would go down to 1 micron. how quick does that baby clog up?

The bypass filter can be used until it completely stops up. Since oil is not being used for lube after filtering, the flow rate doesn't matter. What I recommend is to feel the filter to see if it is hot after the engine has been run for a while. It will slowly cool down as it begins to load up, eventually barely flowing at all. This way you get maximum life from the element. As far as element life? All depends on how dirty the engine is to start with, how it is driven, lots of things.

TF, marcdeluca has the answer. I found with Harvards they would be uniformally warm from end to end. When the filter suddendly started to get cooler towards the middle of the filter I figured it was trapping coolant. I then looked look for an internal coolant leak, and find one. I had it happen to my truck and saw it happen to a friends truck that had a Harvard on it. But neither of us suffered a lot of damage because the coolant ended up in the Harvard and gave us a warning that some thing was amiss. Mike

I have a Baldwin B50 bypass filter on my 6.2L. The fillters cost $8 each and the mounting base cost around $30. It gets oil from the the 1/4"npt port above the filter. To return the oil to the engine I drilled a hole through one of the intake bolts and welded a fiting to it. It is a cheap system and it works fine for me.

Carl

Carl, what is the micron rating of the Baldwin? Mike

If I remember correctly the nominal rating was 2 microns, and 10 microns absolute. I have lost the email I got from balwin tech support, but if you send them an email, they will tell you the ratings.

Carl

As long as you are following tech support at Amsoil i suggest it. You will only need to follow the filter change and analysis specs. If they find a problem with your oil they will put it in writing with suggested possible reasons. The oil will be black but "anaylitically pure" Good Stuff in a non leaking or oil burning motor! Brent

If I remember correctly the nominal rating was 2 microns, and 10 microns absolute. I have lost the email I got from balwin tech support, but if you send them an email, they will tell you the ratings.

Carl

Whats the difference in numbers mean? I got an email on a rating for a different brand of bypass filter, and all they said was "The media in these filters is rated at 10 micron" So just wondering what you mean by nominal and absolute, and what micron should be shot for a bypass system?

The nominal and absolute ratings come from the beta ratio. Basically the nominal rating is where the filter is able to get 50% of the particles, and the absolute is where it traps 98.7% of the particles. A brief explaination can be seen here. http://www.filtermart.com/beta.htm

There are many different methods to test oil filters, and unless a manufacture gives you the test method the data is usless. A manufacture can say that there filter filters down to 10 microns, but how many 10 micron particles is it actually catching?

As far as the mircon rating for bypass filters, the smaller the mircon rating the better, but as long as the filter gets any particles over 5 micron there shouldn't particle enginew wear.

If I were to buy another bypass system I would buy a Frantz or Motorguard system. The are a sub mironic filter and toliet paper as a filtering mediam, so replacement filters are cheap.

Carl

To get the most from Bypass filtration, use a true synthetic oil. Amsoil is one mobil one is not. Amsoil uses ester resin base stock and mobil one uses hydra crac mineral basestock (sp) Fuel is removed from amsoil but I do not think it can be removed from a mineral base oil as it is a solvent to mineral and a pollutant to a true synthetic. I have first hand knowledge of 18 wheelers getting 500,000 miles on one oil change. It requires periodic filter changes and oil analysis. I also personally drove a F-550 87,000 miles on Amsoil between changes. The owner was told, to remove the higher soot related to me driving a little hard as it had the 100 horse chip and stacks it was a blast to run through all 18 gears, to simply change the twin bypass filters one extra time. He opted to just change the oil as "I got my mony's worth". Brent