Oil diverter barbells

[Fu Manchu]

What’s the best type to go for?

Aeroflow do them with straight sides. No seal on the end. Domed on one end as well. Why?

Then I see there are tapered ones

Then of the tapered ones, some have a seal at each end and some don’t. Why?

All seem to have the thread in the end to help install and remove.

What would you recommend and from who?

 

[07GTS]

not sure thought they would all do the same job, unless some are for allowing some thru if say a blockage happens or they are a press in fit, id prob get the one with taper and seal each end, will be fun to fit tho

 

[Immortality]

I like the look of the taper type. Oil flow around 90 degree corners with sharp edges reduces flow, the taper might help mitigate that a little bit.

If you were real keen, you could use a bur with a long shaft and round of the inside corners of the oil galleries where they do the 90° turn (reaching in where the barbel goes).

 

[Fu Manchu]

I found a VCM one that has a deeper end. (That’s what she said) and a seal on the end and the head…
However I think that’s great on cars that might do some strip work or track days regularly. More high end applications.
This will be road and off road (not radical off road).

I take it the second seal ensures nothing bypasses the filter. However in a situation where that might happen, I’d rather some dirty oil than no oil to get through. Would that sound fair?

 

[Immortality]

Filters have bypass valves, if the pressure differential over the filter inlet/outlet gets to much the filter will bypass. Interestingly, this also happens when the oil is cold, when in reality you need maximum filtration (as the **** settles in the bottom of the oil pan as the oil cools and this then becomes the first oil sucked back into the engine on a cold start).

 

[Immortality]

Looking at the LS motors, the bypass is built into the oil filter housing.

 

[Fu Manchu]

Why did GM not have a seal on both ends?

 

[lmoengnr]

Why did GM not have a seal on both ends?

Cost!

 

[DavesSV6Tonner]

Why did GM not have a seal on both ends?

I expect it will be to avoid the possibility of an O-ring becoming damaged during assembly by any sharp edges at the junction of the oil galleries .
Could end up with another source of warranty claims if shards of O-rings end up blocking a gallery to a bearing.