Hi all, about to change the oil and filter on my 2001 bugeye impreza, was watching a video on youtube of how to change and is straight forward enough, but there was no mentionb of the crank sensor, do you have to do this?

 

i would disconect crank sensor and spin it over till oil light goes out then reconect and start it,this way presents any damage to the engine.

 

Unless it's stood empty for ages, this is a "Scooby-myth"...

It's just above the crank pulley.

dunx

 

I've been looking at this for a while.

It looks like if you have rebuilt an engine or its stood for a long time undoing the sensor is the thing to do. If its drain out and refill don't bother.

Its up to you though

 

even quicker option is to remove the fuel pump fuse located in tray next to the battery SBF5 writen on it, then just keep turning the car over til oil pressure light goes out

 

Would like to hear the underlying logic behind both those comments. The bottom line is that there's a risk of transient oil starvation damaging the bearings even if the pickup has only been left dry for a second. If either of you can provide the logic behind the supposition that cranking is only necessary/desirable if the engine has "stood empty for ages" or has been fully rebuilt, I'd be genuinely interested to hear it.

It's far from a "scooby myth", it's a worthwhile precautionary step no matter what the circumstances of the oil drain. As Reef says, Wilko, it's your choice, but personally, whether it was my engine or yours, I'd take the time to do it.

 

Assuming the engine has cooled down once the new oil/filter has been added, I would assume the oil around the bigends would be considerably more viscous than at operating temperature and would be up to the job of lubricating the bearings for a few seconds on initial startup.
One assumes (of course) that in this time, the engine will not be under load nor operating at high revs.
This is my own uninformed opinion however.

 

The guy is asking about doing an ordinary oil and filter change. You won't find any of this nonsense in a Subaru maintenance manual...................

 

Yes, I read his post.

And? You might want to read up on this subject a bit.

 

i had this same issue when my oil and filter were due to be changed, i didnt know what to do so i took it to a independant subaru specialist who has been trading for many years, he just drained it, changed the filter and started it, i asked him about cranking prior to starting and his reply was, if its a fresh engine rebuild or the car has stood for a while you must crank but with a straight forward engine oil change there is no need, his words not mine he assured me he had never had any problems doing it this way and mine has been fine i will be doing it his way in future but thats me its which ever way you feel comfortable!!!

 

I've just done mine and dis-connected the sensor as i'm not lazy and it was a 2 sec job to do... it not exactly a hassle for abit piece of mind

 

Agree with above. It is such a small job to do for peace of mind.

 

As I have to pre-fill my oil cooler rad and pipework anyway, it's up to full working pressure faster than a Defi can do it's start-up sequence...

dunx