My 08 road king classic has a oil pressure gauge mounted on the upper part of the rear cylinder and the other day while I was just standing showing my new purchase to a friend, oil started pouring out of the side of the gauge where this round rubber plug WAS ( I found it on the driveway later and put it in...whew) the oil was very clear and appears not to be engine oil, my question is .....this little black plug which had popped out can Not be the only thing holding back the pressured oil in this guage, is there a set screw or something else that may be missing behind this rubber plug?
Tried to post pic but no go
Thanks for your comments

 

You had a liquid filled gage. The liquid is oil or glycerine and is there to stabilize the needle on the gage while the motor is running. Usually just a rubber plug. The gage will work without oil but the needle may be irratic. Without knowing exacly what the fluid is you ay have problems with adding fluid. You could just remove the non factory gage or replace irt with another.

 

If you're able to figure out who the manufacturer is contact them. Maybe you can send it in to be re-filled and sealed.

I've been wanting to get one of those oil pressure gauges, it's on my List of things to add to my RK, just haven't gotten to it yet.

 

A new Autometer gage is about $30 from Dennis Kirk. Same thing happened to me. Autometer said the oil is available at well equipped hobby shops that handle RC cars and is the same stuff used in the shocks, I believe. They don't offer a replacement plug though. Pressure from your oil system has no effect on this plug. Likely age has had its effects on the plug.

 

Would you get the Jerzee customs one? It looks good but not cheap at 200.00 or so.

 

I stayed with the Autometer unit cuz I like their reliability. I did get the Jerzee dress up shroud though, being a chrome ***** and all.

 

Go to any speed shop/auto parts store and get an AutoMeter gauge. My HD gauge leaked all it's glycerine out. I ran it that way for 2 years, until the gauge face got so yellow I couldn't read it. Like QC, I also used a Jerzee Customs shield to hide the bottom of the gauge.

(Auto Meter gauges are filled with mineral oil)

 

I believe this is the one I have
#75133-99

IN-STORE PURCHASE ONLY Contact dealer for pricing and availability.


Fits '99-'05 Dyna®, '00-later Softail® models, and '99-later FLHR models and '99-'05 FLHT models. Does not fit with Billet Rocker Box Cover P/N 17658-03.

MSRP US $89.95




Download Instruction Sheet

 

Ive got the Jerzee Customs gauge, if you have it (see pic), you can buy replacement gauges for about $25.

 

So you put an Auto meter in place of the Customs and it fit in the chrome shroud then? Does the fitting on the bottom of the gauge work with the braided line?