Engine Flush... (for changing car oil) - ??

mcjordi

Weird_Nev wrote: »

You shouldn't drive the car when the engine flush is in. Just leave it idling for about 10 minutes, to get the engine up to temp and let it loosen the gunk and flush through properly, then drain immediately whilst all the rubbish is in suspension.

I too use engine flush, as it was recommended by a mate who is a very experienced mechanic who services and repairs everything from Porsches to Lamborghinis and ancient classics worth millions.

i wouldnt trust anyone that uses an engine flush...

skivenov

Weird_Nev wrote: »

You shouldn't drive the car when the engine flush is in. Just leave it idling for about 10 minutes, to get the engine up to temp and let it loosen the gunk and flush through properly, then drain immediately whilst all the rubbish is in suspension.

I'd disagree there, a lot of cars don't have particularly good oil pressure when idling.

Strider590

Weird_Nev wrote: »

You shouldn't drive the car when the engine flush is in. Just leave it idling for about 10 minutes, to get the engine up to temp and let it loosen the gunk and flush through properly, then drain immediately whilst all the rubbish is in suspension.

skivenov wrote: »

I'd disagree there, a lot of cars don't have particularly good oil pressure when idling.

And I disagree again, with you both!!!

Sit it on the drive and give it a few K rpm (usually 2000-3000 gets the oil pressure up to maximum), simulate mild driving conditions, taking it out on the road could land you stuck in traffic for longer than the intended flush time.

Limey

After the last time I used an engine flush my engine started peeing out oil from various seals.

My local garage uses it, but he says the Wynns stuff is utter gash. Can't remember what he recommends. :doh:

If you're confident the seals are all good go for it. Otherwise just do what Strider advised, although I don't leave it for as long as 10 mins before removing the plug.

I wouldn't drive the car with a flush in it. If it did cause a seal to go you might end up with bearing damage and it also thins the oil which is going to give less protection under load.

londonTiger

what is oil pressure?

Retrogamer

It's the pressure of the oil inside the engine as it travels around it. There is a part of the engine called the oil pump which pumps oil around the engine to keep it lubricated.

High oil pressure will sometimes cause oil seals to fail on the engine.
Low oil pressure will sometimes cause the engine to fail prematurely.

Throbbe

I wouldn't take it out on the road at all. A cable tie/bit of string on the throttle cable to get the revs steady at 1500-2000rpm for 15 minutes.

I'm generally wary about using a flushing additive, as you'll not get it all drained out and it may affect the viscosity of the new oil. When I have used one I've then filled up with the cheapest oil I can find at an appropriate grade, idled for another 15 minutes, drained that and then refilled with a recommended oil.