09 Dyna Super Glide
Join Date: Feb 2009
Location: North Carolina
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Oil tank to pump.
Pump to engine.
Engine to oil filter.
Filter to tank, via return line to pump back to tank.
Oil tank to Pump.
Pump to filter.
Filter to engine.
Engine to tank.
In the case of the Evo, you'd attach a cooler to the return line from the filter, before returning to the pump/oil tank.
In the cased of the TC engine, you'd attach a cooler via an adaptor, to the filter moutning base, and it would circulate oil prior to entering the engine. Half the reason for this is due to the TC engine having a higher pressure pump and oiling system, and because the oil pump is INTERNAL on the TC engine, and not hanging off the case, where you can access it easily.
Thanks Dave. On these engines, how does the oil get to the valve train? Are there internal oil passages in the cylinders and heads or is it done in with the push rod assembly?
Agreed! So in that line of reasoning, is every 3 to 5k miles excessive? That is the interval I use on my TC88.
Today we were discussing oil coolers and the question of oil routing came up. None of us really had a clue about how Harley does it. After the oil leaves the oil pump, does it go to the oil filter, then through the oil cooler, if the bike has one? If it takes that route, where does it go from there?
If this is wrong, how do Harley engines circulate the engine oil?
I share your concerns, but I am not an expert on the newer models at any level.
No matter what the route the oil takes, I heard that there was an oil pump upgrade for my bike that increased flow and scavenging (sp?) and had a better adjustment tensioner. It was only 400 bucks, which is cheaper than a blown engine.
That was the idea I chose.
(I know that MoCo has a part number for this upgrade and I know it's buried somewhere in their website's parts list--I have seen it. I did a quick search and I cannot find it. A savvy member here will post the parts number of the correct nomenclature name.)