Oil Coolers

NEWHD74FAN

Catwoman' application being in Arizona is classic reason to have a Jagg or HD oil cooler. It's basic simplicity, ease of installation (basically plug & play) while lowering oil temperature 15 to 20 deg F has very little negatives. Plus, some of them can be designed to be inubtrusive and can be had with a little *bling* for looks...!

Honestly, here in SpCal, my carbureted Sporty runs quite cool, with Stage I and slightly rich jetting, it is typically run only to 180-200 deg F in the oil tank; the highest it it ever rose to was 220 deg F was in 118 deg F ambient in the Central Valley, running 80 mph for 180 miles between fillups. Being the minimalist kinda guy I am I chose not to go through the expense or bulk of adding one yet, but if I do, I will include the temp shutoff valve as most of my trips are short and overcooling is not a good thing.

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CatWoman

NewHD74Fan,

If I take a trip to a colder place (pretty much anywhere other than Death Valley, etc)--I mean during the winter, should I bypass (I mean add a shutoff valve) to the oil cooler? It obviously works well in my case and a temp gauge would probably be the best answer but unfortunately I have other priorities (including a job ). If I should add one, where would you put the shutoff valve?

Thanks

CatWoman

NEWHD74FAN

The Jagg and HD coolers come with a thermal valve built in to the oil filter adapter. But a thermostatic valve is available from Jagg or other cooler manufacturers for about $35...and basically goes in series with the input side line for those not equipped. They also make a manual shutoff valve, but I'm one of those who would rather have an automatic one that does not open until the oil is 180 to 190 deg F or so.

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CatWoman

Very Helpful NewHD74Fan

Thank you!!

CatWoman :

smitty901

It is unrealistic to believe you would ever ride in weather cold enough for the cooler to be a problem even if it did not have a thermostat. Jag does not even recommend one< they make it clear they will sell you one but is not needed.

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The Tank

On the subject of an oil thermal switch for the oil cooler, I just want stress a point that NEWHD4FAN made and not lose the wisdom...

On winter days even in SoCal and Arizona if you tend to run a number of short trips the oil temp may not reach the optimum temp which provides us with a benefit, fighting condensation/moisture. We need the optimum heat to be reached on the oil at some point. If the cooler is circulating oil from the start up (no switch) then short trips that one may not have warmed the motor up properly for will never achieve a temperature to heat the oil sufficiently to boil off the condensation. Yes Arizona and SoCal are dry climates but short trips are a negative on a motor whether you have a oil cooler or not. If you have the cooler without the thermal switch you add a further need for the rider to understand why a warm-up is important.

Sorry to beat a dead horse.

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Jim B.

I'm with The Tank on this one. I have the HD cooler on my 09 Road Glide but I live in a very mild climate so I always make sure that my short trips (into town about 2 miles) always turn into longer trips so the engine always reaches the temperature to boil off any condensation. If there isn't time for a longer trip, then it's time to take my Goldwing since it reaches operating temperature much faster.

smitty901

I ride oftern in weather that is 30 degrees and some time colder.
The oil cooler only adds 6 oz of oil to the system.
That big Vtwin warms up even in those temps. yes you do need to give it a few minutes to warm up and ride easy to allow tranmission and primary lube to losen up a bit but it is a big deal.
Now the older EVO engines were a bit more fussy those need to be well warmed up be fore you beat on them.

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CatWoman

I NEED to add something about the importance of warming the motor up besides 'boiling off condensation' as The Tank pointed out:
Cold Seizure -- this is why I had to rebuild my top end. And NO , it was not due to MY neglect. Just to review, if you don't allow time for the chamber to warm, the piston reaches operating temperature first, causing it to expand - and it no longer fits nicely in it's cylinder causing it to scrape the side -- not a pretty sight . By the way, this usually occurs in the front cylinder. Therefore, when starting out my 1989 FLHTCU, I almost ALWAYS have to use the choke and after pushing it in, I still sit there a few moments. Then, after my hand feels the rear cylinder is good and hot, we take off .
As Smitty said:

Course, my ride would not think I beat on her

By the way Smitty, where is it that you find such extreme conditions -- as I recall you said " few if any ever ride in hotter weather" then "I ride oftern in weather that is 30 degrees and some time colder" and I've seen the picture of you riding in the snow (were those snow tires or did you have chains on?)

CatWoman

smitty901

I live in Wisconson and ride just about ever were mostly west last few years.
I am one of the last to park it and one of the first back out. And have riden in snow may times.
Last week it was between 28 and 30 degrees when I left the house. Today it was 38 in the morning and 72 by noon . We get some wild temp chnage sthis time if year and som darn hot summers.

I do my home work and back it up with a lot of miles

This is directly from the JAG FAQ site

5. Do I need a thermostat?
No. But if you are one of those people who just wants it, we have several products to satisfy your want, and we will be pleased to accept your money in exchange for them.
(They come right out and tell you they only reason they sell them is people are will to pay for them.)
7. How much can I expect your oil cooler to lower my temperature?
There are many variables associated with a specific answer to this question. While we possess the computational fluid dynamics programs and in-house oil-cooler-testing facilities to provide specific output, given specific input parameters, we prefer to state that our coolers are designed to bring your oil to within a standard operating range.
(plain english they will not say)

FAQ - Jagg Oil Coolers

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