Busy doing an oil change. I have inserted engine flush, and now am ready to drain. But....

I have tried loosening this oil-sump bolt/plug and it is going absolutely nowhere unless I'm prepared to push my tools over the edge.

What is the next step? Do I need to apply heat? How should I safely do this? I don't have a blow-torch but I could get a low-budget one. Or is there anything else that is safe to use? What about a lighter? It is an open flame so I'm not very confident to try that yet.

Only other thing I can think to try is a soldering iron.

enter image description here

  • I don’t want to sound condescending, but you are turning it anti-clockwise, viewed from below?
    – HandyHowie
    Oct 6, 2023 at 18:00
  • Yep. Fair question. From below I'm turning it anti-clockwise.
    – Jim
    Oct 6, 2023 at 18:02
  • In the interests of time.... we are heading into overnight territory, here, so is it safe to leave the flush in overnight?
    – Jim
    Oct 6, 2023 at 18:05
  • Does the engine flush say anything about leaving it in too long? I don’t ever use engine flush, I think it can do more harm than good, since the deposits you disturb will be pumped to all the smallest oil ways in the engine.
    – HandyHowie
    Oct 6, 2023 at 18:12
  • No. It just says add to warm engine, Idle for 15 mins before draining and filling with new oil. And it says do not drive (with the flush in). I'm going to have to back it out of the garage for the night though.
    – Jim
    Oct 6, 2023 at 18:23

1 Answer 1


The amount of heat you would probably need to apply, probably wouldn’t be a good idea applying to the sump. The oil will absorb the heat, which could quickly get to ignition temperatures.

I think I would check availability of a replacement sump before forcing the plug out with a breaker bar.

If you are worried about damaging the sump, it is often possible to pump the old oil out via the dipstick tube, a lot of garages do it this way to save getting underneath the vehicle.

  • Ok. So, how would I do this?
    – Jim
    Oct 6, 2023 at 18:28
  • 1
    Do you mean pump the oil out? - youtube.com/watch?v=70zR_Doi1ag
    – HandyHowie
    Oct 6, 2023 at 18:38
  • Ok. That's one temporary solution, so thanks, Howie. I'm going to see if I can try to get some local advice before resorting to this method as I'm concerned about residual oil beyond the reach of the tube.
    – Jim
    Oct 7, 2023 at 9:19
  • 1
    I eventually siphoned the oil out. Went with the cheaper option, until I can source some options for forcing the sump plug loose.
    – Jim
    Oct 19, 2023 at 14:09
  • 1
    Yes, if you damage the sump trying to get the sump plug out, then you will be stuck without a vehicle until you can fix it. If you can get a reasonably cheap sump and plug from a breakers then you are ready to replace the sump if the worst happens. You will obviously need a sump gasket too. You could also just continue doing oil changes by removing the oil through the dipstick, its up to you.
    – HandyHowie
    Oct 23, 2023 at 12:37

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .