eggy790

iTrader: (20)

HI

got my oil changed this morning at local garage, after much headache, and arguing told them to do it as api suggested..

primed filter etc. disconnected what we thought was the sensor and turned over on the starter.. car didnt start... cool thought ok another 15 secs or so..

on second turn the car started but reall rough and lumpy..

i take it i didnt disconnect the right sensor?

anyone got a pic for next time?

hope i didnt cause a problem

hate oil changes, always makes you think of the worse.

cheers

Jamz_

iTrader: (12)

Nope you didnt disconnect the right sensor by the sounds of it....

I un plug mine from the wiring loom on my 93 (have a front mount so its easy to get to the plug) saves me trying to unbolt the sensor.

The plug is under the top mount if you still have it fitted, or the sensor is under the alternator

cockneymfc

iTrader: (2)

ive got a 2003 WRX i just drop the oil primed the new filter put the new oil in and it was fine..........what sensor

Jamz_

iTrader: (12)

He is talking about the crank position sensor... There is lots of talk about how to change the oil in the impreza's to apparently stop the engine go boom... now people talk about removing the crank position sensor so the ECU wont start the engine but the starter motor will turn the engine over.

Now I don't know what to believe about this process, the only reason I did it was to fill my oil cooler with oil as I couldn't prime it before hand... but I don't see any need to remove the sensor for a normal oil change, but if you would like to join in the debate... see this thread:
https://www.scoobynet.com/general-te...questions.html

eggy790

iTrader: (20)

hi does anyone have a picture of it?

its defo the wrong sensor then, once the car started, i just switched it off, connected sensor back up and left it..

filter was well primed, filled it for like 10mins

should be ok, too late to go back.. whats done is done.

Eddy

Jamz_

iTrader: (12)

Eggy see here:
https://www.scoobynet.com/general-te...r-removal.html

eggy790

iTrader: (20)

cheeers so this it



and you just disconnect the grey part of the plug from the red? defo the wrong sensor that i pulled then lol

D1CCY

Its a lot easier to pull the fuel pump fuse out instead. On a new age this is SBF5 in the box behind the battery.

brendy76

iTrader: (6)

Why do folks incessantly worry about this?
When you leave the car overnight you are doing exactly the same thing, does everyone disconnect then also?

Jamz_

iTrader: (12)

brendy76, maybe you should read this thread:
https://www.scoobynet.com/general-te...questions.html

eggy790

iTrader: (20)

o cool, this sounds easier, ill do this next time, unplug then re-plug

mozzerscoob

iTrader: (1)

I'm not sure on what to think about this process and i personally have never done this but when my car goes in for it's service the sensor or fuel pump fuse is never removed to prime.worth ringing a few specialists and getting their views.

brendy76

iTrader: (6)

Still not proven and having done oil changes before on my impreza, have yet to run into any "trouble". I am sure the oil pump retains a little oil anyway that doesnt get drained and on first turnover should have enough oil circulating within a split second that it wont make any difference.

nick172sport

iTrader: (6)

if you have anything to put forward put it in the thread oil changes there are and have been a lot off blobs going **** up after havin a oil change if api david recommends this being done enough said in my mind hope you dont run into trouble

mit

iTrader: (10)

It takes seconds to do this, so why not? Any chance of oil starvation after an oil change is good enough reason for me.

joz8968

iTrader: (13)

I'm in total agreement with mit ^^^

eggy790

iTrader: (20)

just to bump this up again as i feel like a right clown

i cant for the life of me find that sensor on my car lol

could someone highlight in this engine bay picture where i would find it.. as i spent 10 mins looking and couldnt find it

Splitpin

Eggy, see in your pic where the big coolant feed hose is attached to the radiator? See the alternator pulley immediately behind it, beneath the cover?

If you peer down between the rad hose and the alternator pulley at the front of the engine you will see the top of the timing belt cover. Immediately behind the cover, and underneath the front of the alternator, you will see a black or brown piece of plastic with an electrical connector sticking out the side. That is the top of the crank position sensor.

It'll be a bit of a squeeze getting your fingers in but you press down on the catch and wiggle the connector around, and it'll come off. Crank your engine over and then plug the sensor back in. Car will start - and you'll see the check engine light on for three or four starts after that.

eggy790

iTrader: (20)

cheers split pin i'll have a look in the morning

should be easier to find now

eggy790

iTrader: (20)

is it ok to just take the fuse out and out it back in?

SBF5 fuse?


because i honestly cant get my hand in to unplug the connector, maybe i just have big hands lol

Chris8055

iTrader: (2)

I worked as a mechanic at a Subaru main dealer for six years and we never unplugged or removed a fuse after an oil change......

We never had problems so why are you doing it now!???

Jamz_

iTrader: (12)

Oh not again.... Chris, I will re-direct you to the link below:
https://www.scoobynet.com/general-te...questions.html

Chris8055

iTrader: (2)

Jamz.

People just have to much time on their hands........Thanks for the link

.......i'm not getting involved with this debate.....i'll just practice what i know!!

Jamz_

iTrader: (12)

eggy790

iTrader: (20)

lol debates aside, i'd just like to know if the fuse will do the same thing?

as it doesnt seem to be recommended as much as the sensor removal

Splitpin

Eggy, removing the SBF-5 fuse on a newage will disable the ECU so the effect on the engine/cranking will be the same as pulling the sensor, yes.

The reason why it might not be recommended as much is that the crank sensor is usually easier to find than some fuse in the fuse box surrounded by other fuses (and, depending on what MY you have, not always in the same physical place).

As such, removing the crank position sensor is a solution that can be applied in the same way to every Impreza ever made - it's a simple piece of advice because it's universal.

Because some care about not breaking the cars a little more than your average garage mechanic, who, main dealer or otherwise, isn't very intelligent/proactive, and prefers to rely on bullsh*tting the owner and/or the warranty, thereby getting paid for fixing the problem as well as causing it?

And no, I don't actually think all mechanics are that bad, but you did ask the question so I've given you a devil's advocate answer.

Part of the issue with this is that bearing damage resulting from transient oil starvation is a cumulative process - so the mechanic who just did the oil change probably won't be the person to notice the consequences. The first you/he will know is when the car gets brought back in some (possibly considerable) time later with a bearing failure.

You got involved in it the moment you posted #23, and included a question in it. If you wanted to practice what you know in private without getting involved in discussion you shouldn't have posted your views in a discussion forum.

Seeing as you've worked at a dealer for so long, maybe you could tell us, from a technical point of view, why you think taking these extra steps are unnecessary or inadvisable, or did it simply never occur to you at the time?

eggy790

iTrader: (20)

ok cool well mines a newage so i'll go with the sensor removal, saves my scraping my hands/getting dirty hands every week or so when i start it..

cheers

Maz

iTrader: (34)

I know this debate is going to on forever but I have a couple of questions. Firstly isn't it better to start the engine straight away so you have lots of oil pressure immediately? Cranking without the sensor isn't going to give you much oil pressure and thus you're stressing the engine on that basis aren't you? Secondly if you are going to disconnect the crank sensor wouldn't it be viable to take out the spark plugs to relieve the stress on the bearings?

joz8968

iTrader: (13)

EinSteinRA, read through the thread as linked to in Jamz' post #22... All your questions will be answered in great detail....

Chris8055

iTrader: (2)

Splitpin.

I worked for Subaru about 6 years ago now, And in that time we never had any bullitins come through from I.M....telling us about this problem.
We did however have to change quite a few cranks etc on the older classic shape cars, which at the time we put down to either driver abuse or poor manufacturing of the crank.
I left Subaru in 2004 and we didnt really have a problem with the bugeye or blobeye cars as far as the cranks were concerned.......so we thought Subaru had delt with this issue. Obviously i cant comment on what is happening now as i dont work for them.

I simply asked the question why are you doing this now because i have just recently bought a blobeye (because i know the 2.0 engine as apposed to the 2.5) because someone somewhere has been told either from I.M or another source that this is the practice to carry out and im interested thats all.

I didnt actually say that these steps are "inadvisable or Unnecessary" I was just simply giving my opinion whether it is right or wrong.

And to answer your question I personally would much rather service the cars as apposed to stripping engines out and replacing cranks etc even if i did get paid for it. Again this is just my opinion!
I actually left the workshop and became assistant service manager for a short time and to be quite honest some of the bullsh**t we had to tell customers was just unbelievable! The reallity was you had the company who i worked for wanting to make as much money as possible and Subaru wanting to give stuff away for free to look after the customer, hence why i left!
One thing i learnt was that you cant bulls**t a Subaru customer because their car is their pride and joy and they know more about it than you!

So just to clear things up..........I bought a Subaru because i love the cars, and i joined Scoobynet to learn more about them........yes i'll give my opinion and the amount of knowledge that i know.......but you can decide whether it is right or wrong.

Chris.