Coolant filters

[Bob Rooks]

Hey Rob:
As promised, albeit somewhat late. My apologies.
Coolant or jacket water filters have been around for quite some time but are becoming more popular as knowledge of them and the benefit they provide comes to the forefront.
I have one installed on my dozer's high speed TY395 engine, and have them installed on the medium speed engines I supervise at work.
Everyone knows that it is virtually impossible to get all of the casting media removed from cylinder heads, engine blocks, and the various cast and machined components of an engine, and very few small engine manufacturers seal-coat the cooling passages (jackets) of an engine due to costs involved. And by small, I'm referring to medium and high speed diesel engines under 2,000 HP. The casting media will build up in drifts around cylinder liner bases causing hot spots. It will also find it's way into water pump seals regardless of type, and wipe out shafts and bearings. And in high pressure/velocity systems, the casting media will act just like a pressure washer with a sand mix and take out pump impellers, volutes, and soft brass thermostats.
With all that said, understand that I have nothing to gain by passing this information along. Time and space prohibit the full documentation of claims, but if you Google coolant filters you will see in very short order what I am talking about.

 

[richg209]

Bob,

Looks as though you placed the coolant filter in the "bypass" loop? Is that correct? Is that the correct location for these smaller diesels?

thanks

 

[Bob Rooks]

Bob,

Looks as though you placed the coolant filter in the "bypass" loop? Is that correct? Is that the correct location for these smaller diesels?

thanks

Yes on both counts. That is where the pressure differential is the greatest and the flow is constant, giving you lowest residence time of the coolant in the engine block.
With the less effective in-line filter, the top radiator hose would be preferred.