Thread: Ford Ranger Servicing Options

Originally Posted by DemocKot

Wasn't there a possible urban rumour that you have drain engine oil on a ranger and refill it with 10 minutes? As the oil pump doesn't re prime and can lead to engine failure ?

Yes - not just a Ranger thing it's a Pugeot idea. Variable displacement oil pump which takes less energy to drive the pump to deliver the correct volume of oil, but the consequence of that is if you let the oil drain out of the pump it's a bitch to reprime it and the usual methods like push the accelerator down will definitely not help and can destroy the engine. The only really easy ways to reprime the oil system if it's needed is way overfill the sump and leave the thing overnight for the air to migrate it's way out or wrangle up a device to mechanically backflush the system to push any air out. I would like to find out what they do in the factory to sort this out on first fill and test run, they must have an adapter that they fit up somehow to circulate oil through the system in such a way that the engine is mechanically protected while they run the thing and the pump clears itself and starts working all by itself...

Apparently the change process for these engine types is get everything prepped and ready to go including prefilling the new oil filter and turning the cellphone off, drop the old filter and replace with new, drop the sump plug and replace plug gasket while it's draining, as soon as the sump stops draining refit the sump plug and torque to spec, drop the premeasured amount of oil into the top of the engine and check dipstick to show it's registered and cross fingers and start the b'arch. Less than 10 minutes is a good rule of thumb, but there isn't a set time for this as it is basically oil draining back into the sump from out of the pump casing and pickup that causes the issue. I've heard of engines that the owner had no idea and did several oil changes including a coffee break to allow everything to drain and never had an issue, and then I've heard of one case where a dealer in Aus had issues even following the procedure and had to rebearing an engine (had to give the owner a loan vehicle, which ironically got written off in flooding a few days before his own vehicle was fixed and ready to be picked up). I think that's the reason for replacing the new filled filter prior to draining the sump - try and prevent everything draining back through the pump casing.