Changed diff oil today & purged cooler!

Petrol · 25-02-2003, 22:22

Well Iv'e been talking about it for a while and today I bit the bullet.
I was concerned about changing the diff oil without purging the cooler but it was easy really.
If you are going to DIY this I would recommend you take the filler plug out first which is what I did. What a b***ard!
Eventually I did it but out came the oil - all over the kin place! Hmmm made me thing about things here... I came to the conclusion that the oil cooler only kicks in over 75Mph and when the diff oil is >135 C ish. I think that the pump has never kicked in on this car resulting in the increased diff oil level. In other words the diff radiator had emptied into diff itself.

The rest of the job was easy though. It's just a matter of disconnecting the cooler hoses and draining whats left.

After filling the diff and re connecting the hoses I started the pump. The manual suggests disconecting the loom in the boot. This involved removing the CD changer!
I removed the boot off the red wire on the pump and ran a cable from the battery via a fuse and the pump started.

What was interesing is that the pump seemed to be OK at first, but then it started making strange noises - obviously cavitating. After a few restarts I heard the flow of oil around the cooler

I had to re fill the diff with quite a bit of oil since the cooler was now full.

Hope this is useful

Pete R

BTW my SX has done 40K miles

Martblusx · 25-02-2003, 22:30

Well done mate

So how did you get the filler plug out? Last time I looked it did indeed look a complete b@stard

Cheers

PhilMorrison · 25-02-2003, 22:44

I just used a 1/2" ratchet, I think it's actually a metric square but the 1/2" works fine.

I'm a little concerned hearing that the diff cooler won't do anything unless it registers over 135C and the cars going over 75mph. Obviously when drifting, u very rarely go 75mph, but the diff get's just about the most grief a diff can have....... What are peoples thoughts on finding some way of making the diff cooler come on before 75mph and 135 C??????

Can any1 confirm that it is 75mph and 135C, or is it 75mph or 135C????

Petrol · 25-02-2003, 22:55

After ages of farting about I used a short socket extension.
I changed the gearbox & engine oil and all but that diff plug was something else!

Interesting note:

When I took the drain plug's out of both the gearbox & Diff there was some slight deposits on the magnet.
I think it was worth it!

Pete R is now "fully Synthetic"

Petrol · 25-02-2003, 23:18

I can!

Manual says...

Diff cooler on at 130C.Off at 120C However the pump will not operate at speeds less than 75 MPH.
That is from the manual.
The diff's "grief" aint about temp - Its about "hammer"

Pete R

SKIDZ · 26-02-2003, 00:26

Quote:

Originally posted by Petrol
I can!

Manual says...

Diff cooler on at 130C.Off at 120C However the pump will not operate at speeds less than 75 MPH.
That is from the manual.
The diff's "grief" aint about temp - Its about "hammer"

Pete R

hammer = heat

, you could make up a new system easier enough, you could use an oil filter thermostatic sandwich plate or the like?

Wak · 26-02-2003, 08:22

Quote:

Originally posted by Petrol
I can!

Manual says...

Diff cooler on at 130C.Off at 120C However the pump will not operate at speeds less than 75 MPH.
That is from the manual.

Pete R

Really? That does surprise me! I would have thought that it would work solely on temperature

Petrol · 26-02-2003, 09:21

Quote:
Really? That does surprise me! I would have thought that it would work solely on temperature.
------------------------------------------------------------------------------

Hmmmm this does make Sense. If you short out pins 3 & 4 on differential oil cooler relay 2 (T15) it will ignore the speed and switch on solely on temperature

The relay incidentaly in the RHS of the boot.
Relay 1 is blue.
relay 2 is black this is the one

Pete R

Petrol · 26-02-2003, 09:27

If you want to see the wiring diagram I could scan it and e-mail it someone

Pete R

SKIDZ · 26-02-2003, 09:40

nice one

Wak · 26-02-2003, 10:09

Quote:

Originally posted by Petrol
Quote:
Really? That does surprise me! I would have thought that it would work solely on temperature.
------------------------------------------------------------------------------

Hmmmm this does make Sense. If you short out pins 3 & 4 on differential oil cooler relay 2 (T15) it will ignore the speed and switch on solely on temperature

The relay incidentaly in the RHS of the boot.
Relay 1 is blue.
relay 2 is black this is the one

Pete R

All we needed was someone clever

Electic is the devils work as far as I'm concerned

PhilMorrison · 26-02-2003, 11:28

Quote:

Originally posted by Wak
All we needed was someone clever

Electic is the devils work as far as I'm concerned

Amen to that

by short them out, do u mean connect them together? I'm not what u might call an electrical expert

Mbowler · 26-02-2003, 11:54

went to change the gearbox oil and diff oil at the weekend. The gearbox oil was VERY VERY EASY! All plugs on the gearbox came undone VERY VERY EASY! A two minute job!

So I went to do the diff, WELL WOT A FOOKIN crock of S**T both plugs were rusted in solid! Couldnt get them to move wot so ever!

So I never changed it! doh!

As a general rule, I always attempt to remove the filler plug first then attempt to remove the drain plug.

Petrol · 26-02-2003, 17:47

If you short out pins 3 & 4 on differential oil cooler relay 2 (T15) it will ignore the speed and switch on solely on temperature

------------------------------------------------------------------------------

Take the 2 wires that are connected to pins 3 & 4 and join em together.

To check it's working get a piece of wire and connect 1 end to the chassis and the other to the diff temp switch. The easiest way to do this is pull back the black insulation on the switch and connect the wire. The diff temp switch is the 1 on the left looking from the back of the car. The one on the right is low diff oil level. Switch on the ignition & the pump should run

I have emailed SKIDS the relevant drawings.
I'm gonna have to become a member then I can post Ya all pics

Pete R

tanjuakio · 26-02-2003, 18:35

Nice one Pete

SKIDZ · 27-02-2003, 13:09

trying to display.

file too big to display

Petrol · 27-02-2003, 13:19

What!!! File too big??

All 3 are only 217Kb

Pete R

SKIDZ · 27-02-2003, 16:39

tried to display and it said just that, mind you im not the most computer literate person

Petrol · 27-02-2003, 16:46

OK If anyone really wants these drawings email me and I will send Em Ya

Pete R

Martblusx · 27-02-2003, 18:28

If you want to email them to me I'll stick them up.

Try martwilliams@hotmail.com

25-02-2003, 22:22	#1
Petrol Lost the plot Join Date: Feb 2003 Location: North West Posts: 5,079	Changed diff oil today & purged cooler! Well Iv'e been talking about it for a while and today I bit the bullet. I was concerned about changing the diff oil without purging the cooler but it was easy really. If you are going to DIY this I would recommend you take the filler plug out first which is what I did. What a b***ard! Eventually I did it but out came the oil - all over the kin place! Hmmm made me thing about things here... I came to the conclusion that the oil cooler only kicks in over 75Mph and when the diff oil is >135 C ish. I think that the pump has never kicked in on this car resulting in the increased diff oil level. In other words the diff radiator had emptied into diff itself. The rest of the job was easy though. It's just a matter of disconnecting the cooler hoses and draining whats left. After filling the diff and re connecting the hoses I started the pump. The manual suggests disconecting the loom in the boot. This involved removing the CD changer! I removed the boot off the red wire on the pump and ran a cable from the battery via a fuse and the pump started. What was interesing is that the pump seemed to be OK at first, but then it started making strange noises - obviously cavitating. After a few restarts I heard the flow of oil around the cooler I had to re fill the diff with quite a bit of oil since the cooler was now full. Hope this is useful Pete R BTW my SX has done 40K miles

25-02-2003, 22:30	#2
Martblusx Guest Join Date: Sep 2001 Location: Coventry Posts: 1,441	Well done mate So how did you get the filler plug out? Last time I looked it did indeed look a complete b@stard Cheers __________________ 441 bhp at the fly and 377bhp at the hubs, take your pic and dont winge about it Martin My Photography www.martwilliams.co.uk

25-02-2003, 22:44	#3
PhilMorrison ///Man Join Date: Jan 2002 Location: Bham Posts: 9,853	I just used a 1/2" ratchet, I think it's actually a metric square but the 1/2" works fine. I'm a little concerned hearing that the diff cooler won't do anything unless it registers over 135C and the cars going over 75mph. Obviously when drifting, u very rarely go 75mph, but the diff get's just about the most grief a diff can have....... What are peoples thoughts on finding some way of making the diff cooler come on before 75mph and 135 C?????? Can any1 confirm that it is 75mph and 135C, or is it 75mph or 135C???? __________________

26-02-2003, 18:35	#15
tanjuakio NON-MEMBER Join Date: Jan 2002 Location: Carrot crunching land Posts: 1,195	Nice one Pete __________________ I miss this car --> Red S14 with an unhealthy addiction to Optimax 263.3bhp@6385 262lbs/ft@4796 208bhp/ton Siiidddeeewwaayyyssss...

27-02-2003, 18:28	#20
Martblusx Guest Join Date: Sep 2001 Location: Coventry Posts: 1,441	If you want to email them to me I'll stick them up. Try martwilliams@hotmail.com __________________ 441 bhp at the fly and 377bhp at the hubs, take your pic and dont winge about it Martin My Photography www.martwilliams.co.uk

25-02-2003, 22:55	#4
Petrol Lost the plot Join Date: Feb 2003 Location: North West Posts: 5,079	After ages of farting about I used a short socket extension. I changed the gearbox & engine oil and all but that diff plug was something else! Interesting note: When I took the drain plug's out of both the gearbox & Diff there was some slight deposits on the magnet. I think it was worth it! Pete R is now "fully Synthetic"

25-02-2003, 23:18	#5
Petrol Lost the plot Join Date: Feb 2003 Location: North West Posts: 5,079	I can! Manual says... Diff cooler on at 130C.Off at 120C However the pump will not operate at speeds less than 75 MPH. That is from the manual. The diff's "grief" aint about temp - Its about "hammer" Pete R

26-02-2003, 09:21	#8
Petrol Lost the plot Join Date: Feb 2003 Location: North West Posts: 5,079	Quote: Really? That does surprise me! I would have thought that it would work solely on temperature. ------------------------------------------------------------------------------ Hmmmm this does make Sense. If you short out pins 3 & 4 on differential oil cooler relay 2 (T15) it will ignore the speed and switch on solely on temperature The relay incidentaly in the RHS of the boot. Relay 1 is blue. relay 2 is black this is the one Pete R

26-02-2003, 09:27	#9
Petrol Lost the plot Join Date: Feb 2003 Location: North West Posts: 5,079	If you want to see the wiring diagram I could scan it and e-mail it someone Pete R

26-02-2003, 09:40	#10
SKIDZ Guest Join Date: Jan 2002 Location: Wellingborough, Northants Posts: 4,210	nice one

26-02-2003, 11:54	#13
Mbowler Guest Join Date: Oct 2002 Location: Teesside Posts: 478	went to change the gearbox oil and diff oil at the weekend. The gearbox oil was VERY VERY EASY! All plugs on the gearbox came undone VERY VERY EASY! A two minute job! So I went to do the diff, WELL WOT A FOOKIN crock of S**T both plugs were rusted in solid! Couldnt get them to move wot so ever! So I never changed it! doh! As a general rule, I always attempt to remove the filler plug first then attempt to remove the drain plug.

26-02-2003, 17:47	#14
Petrol Lost the plot Join Date: Feb 2003 Location: North West Posts: 5,079	If you short out pins 3 & 4 on differential oil cooler relay 2 (T15) it will ignore the speed and switch on solely on temperature ------------------------------------------------------------------------------ Take the 2 wires that are connected to pins 3 & 4 and join em together. To check it's working get a piece of wire and connect 1 end to the chassis and the other to the diff temp switch. The easiest way to do this is pull back the black insulation on the switch and connect the wire. The diff temp switch is the 1 on the left looking from the back of the car. The one on the right is low diff oil level. Switch on the ignition & the pump should run I have emailed SKIDS the relevant drawings. I'm gonna have to become a member then I can post Ya all pics Pete R

27-02-2003, 13:09	#16
SKIDZ Guest Join Date: Jan 2002 Location: Wellingborough, Northants Posts: 4,210	trying to display. file too big to display

27-02-2003, 13:19	#17
Petrol Lost the plot Join Date: Feb 2003 Location: North West Posts: 5,079	What!!! File too big?? All 3 are only 217Kb Pete R

27-02-2003, 16:39	#18
SKIDZ Guest Join Date: Jan 2002 Location: Wellingborough, Northants Posts: 4,210	tried to display and it said just that, mind you im not the most computer literate person

27-02-2003, 16:46	#19
Petrol Lost the plot Join Date: Feb 2003 Location: North West Posts: 5,079	OK If anyone really wants these drawings email me and I will send Em Ya Pete R