BYpass help Isuzu 4BD1

[Shup1]

My hunting camp has a MQ power 40KW diesel generator, it has a 4BD1 Isuzu motor and has approx 8k+ hours. We change the oil every 200 hours or so and use good oil (Delo 400) and good filters (Wix cartridge style), since this is the lifeblood of the camp I am interested in putting a by pass flter (Amsoil / Oilguard or Frantz) with quality Synthetic....BUT...where is a spot I can tap oil from?

 

[Gary Allan]

I would think that the pressure sender port would be the best place. An engine like that may have several ports to tap oil pressure from. How big is the sump on this engine?

 

[Shup1]

That was my thought but does tapping into this with a 'T' reduce the pressure enough to shut down due to low oil pressure? I know I am using a flow restricted bypass but just curious before I go thru the trouble that this thing will be shutting off every time it runs.

 

[Gary Allan]

The only time I've heard of any issue with indicated pressure while using a T fitting is when the owner decided to install the sender remotely. That is, they used the T at the end of a long skinny line and tapped both the sender and the bypass at the end. This caused the flow to the bypass to reduce the line pressure at that point in the line to below normal levels. There was no difference in the flow to the bypass filter ..just the pressure drop over that length of skinny tubing @ that flow rate lowered the pressure at the sender.

The bypass should look like a brick wall to oil flow at start up. If tapped right off the port, there should be no measurable difference in oil pressure.

 

[Shup1]

So I should use a 'T' insert and place the sender at the end of the 'T'...then put the oil line in the other spot? My gauge is electric so I would not be putting any longer hose or fitting than needed to place lines / sender in. I am headed to camp this weekend and will photo to make sure it looks right before I run any extended time.

Thanks

 

[Shup1]

Forgot...the sump is 14 quarts..
We have been using Delo for years and wix filters but since we are basically over 400K miles I thought maybe a little better filtration would help?
I also forgot to mention that the oil was not changed last service date and has over 400 hours....I am going to take a sample and send off for analysis...this should be good!

 

[Gary Allan]

14 quarts. According to the recommendations you're on the borderline of the 15 quart minimum for the full line of single or dual big filters. Effectively either a BMK-11 or BMK-12. Any of the EaBP90,100, or 110 filters can be used.

Looks like a BMK-11 with either a 100 or 110 filter would do the job.

Scroll down to the table near the bottom.

 

[Shup1]

Thanks Gary