Quote:
Originally Posted by Assimilator1
I've been a car mechanic for 26yrs, every petrol engine I've done an oil change on I've heard the start rattle, it's normal, nothing particular to the S65. (Diesel engines you often can't hear it over the engine itself, as you probably know). No need to change tensioners  , or when you said 1st crank, did you mean any 1st crank, not just after an oil change?
and I run really really hard up to 210 before I pull the plugs
Sorry, don't understand that sentence.
I wasn't suggesting that cranking was ideally needed after a regular oil change, just after rod bearings as much more oil is drained off.
Re large diesels, ever work on a Deltic engine? 
Strange about the oil temps, I would've thought that better oil flow would reduce oil temps slightly and possibly slightly lengthen warm up, weird that yours warms up more quickly. |
My main point I was trying to get across was that cranking the engine for the sake of building oil pressure wasn't needed and could possibly be worse than just firing it up on the first crank as it will build oil pressure faster at running RPM thus reducing rotation cycles at less pressure and flow.
First crank after an oil change. I really have no idea what is different after a full drain oil change from a normal start. I'd think the same amount of oil would be up in whatever components are making the chainsaw sound either way. Check valves come to mind, but I can't explain one vs the other.
The 210 comment was about running the oil up to full temperature for US gauges or even above before pulling the drain plugs for an oil change just to get as much oil and crud out of the engine by thinning down the oil as much as possible.
No, I've heard of Deltic, but never been around one.
I should include that some of these engines do have pre-lube systems, which kind of defeats my argument about cold starting large diesels to full RPM and load without cranking for oil pressure is acceptable. However, not all of them do and seem to manage fine.
Sorry for the earlier odd post and dragging the thread a bit off topic.
Cheers,
X