I am about to do my first oil change this weekend. I searched the web and found several different opinions on whether the engine needs to be warm before changing the oil. There is also conflicting info on where to drain the oil. Any advice. Pics of where to drain the oil would be helpful.
Assuming it is a dry sump engine drain the oil tank from the main oil feed pipe to the sump.
Also remove the sump bung from the oil pan and drain that (even though its dry sump there is still a surprising amount of oil in the pan).
Cold is fine, unless it is really cold, just allow a little longer for it to drain out. Also means no chance of burning yourself!
Make sure you dry crank the engine for oil pressure before firing it up.
Oil and GDU fluid change completed this weekend! An FYI for anyone doing this for the first time, there are some large bolts on the engine and oil lines going to the engine. I started the job not realizing I needed a 32mm, 28mm, 26mm and 17mm wrenches. I used an adjustable wrench to get by it was not optimal.
As an aside, several of those larger fittings are AN fittings - grab an AN wrench or 3 and they will help ensure you don't bend/break anything.
My first oil change. I have fully loosened the oil line at the sump, but I cannot seem to move the line and fitting out of the way to allow the oil to drain fast. Is there a way to wiggle the end of the oil line to the sump out of the way, or is this unnecessary? Should I disconnect both ends -- from the tank and the sump, or just the sump end?
Thanks in advance.
I always loosen from the can side, it's quite a bit easier to get off.
Thank you Garrett.
I ended up loosening both ends and removing the line which might have provided a little better access to safety wire the 17mm sump plug. Messy though, and a lift would make this a whole lot easier.
Dumb question: what is AN wrench, have not heard that before? What is different from normal wrench?
AN stands for Army and Navy. I don't know the exact origin, but I believe that an AN hose fitting was used by Army and Navy for aircraft, and these became known as AN hose fittings.
Do you need an AN wrench for an AN fitting? They worked well for me and do not round the corners or mar the finish. I can tell some fittings on my car are rounded, e.g. the GDU oil fill line, perhaps because someone did not use and AN wrench on it.
The large orange wrench below (16) is what I used for the oil line from the tank to the sump.
AN is indeed Army Navy, and came about during WWII as the US government designed a standard thread, taper, and hose size to help get compatibility among all the various American manufacturers at the time as well as the Army and Navy. 🙂
