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GoNz0

Inline thermostat mod to fix the gearbox heat exchanger write up.

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Yeah I had seen that but it's a Cordierite one and BMW say to use SIC ones, anyone know a reason not to go for the cheaper option apart from it being half the price of Silicon Carbide?

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2 minutes ago, GoNz0 said:

Yeah I had seen that but it's a Cordierite one and BMW say to use SIC ones, anyone know a reason not to go for the cheaper option apart from it being half the price of Silicon Carbide?

 

:wacko:

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A snippet, seems the combined units should have SIC DPF's

 

Quote

What are they made from?

  • Cordierite DPFs look very similar to Catalytic Converters and are mostly used in additive systems in conjunction with Diesel Oxidisation Catalysts. They are often used in aftermarket products and can be found in our standard DPF range.
  • Silicon Carbide (Sic) DPFs are constructed from small sections cemented together. They are more commonly used in O.E and Catalysing DPFs and are classed as a BM Premium product due to their high thermal and strength endurance

 

http://www.bmcatalysts.co.uk/diesel-particulate-filters/

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Just now, Dotcom1970 said:

I did see on the BM homepage something about their premium range, so perhaps they will be releasing one in the future

Not sure m8, might give them a ring and see as they are local to me anyway.

Odd that they don't list the 535d part number 18308508523 though.

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I ran a few part numbers and the 535 DPF while looking the same isn't, I assume it allows more flow due to the higher output.

 

 

I got all excited that I could fit a new DPF for under £300 for 10 minutes there :lol:

 

Walker ones are about £600... :blink:

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16 hours ago, Dotcom1970 said:

Got a reply a few minutes ago.

 

Quote
 
Unfortunately this part BM reference BM11101 is currently in development until September 2018.
 

 

I did offer to be a test car for a discount ;)

Edited by GoNz0

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On 01/11/2018 at 11:25, GoNz0 said:

It's that time of year again where a faulty stat will mess with your temps!

 

Gonzo, you pretty much saved me a sh*t ton of money.

I changed both thermostats (EGR & Main) and still had issues with the temps (62°C) after 20km 

I just clamped down the lead pipe to the transmission cooler and.... gotcha!

Inline termostat is ordered and will be placed to the return pipe this weekend.

Again thanks A LOT for this guide... it was pretty hard to find though... maybe cause i'm from germany :mrgreen:

Cheers mate!

20181119_182704.jpg

20181119_203917.jpg

20181119_203959.jpg

Edited by freekone

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Not just a shit ton of money but on top of that the stress involved when you replace the heat exchanger and it still doesn't work. Glad it helps :)

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15 hours ago, freekone said:

 

Gonzo, you pretty much saved me a sh*t ton of money.

I changed both thermostats (EGR & Main) and still had issues with the temps (62°C) after 20km 

I just clamped down the lead pipe to the transmission cooler and.... gotcha!

Inline termostat is ordered and will be placed to the return pipe this weekend.

Again thanks A LOT for this guide... it was pretty hard to find though... maybe cause i'm from germany :mrgreen:

Cheers mate!

@freekone

If you frequent German BMW forums please spread the word. As you have already found it takes minutes to clamp off the pipe to test the heat exchanger :!: 

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This is interesting stuff. @GoNz0

 

Both stats were changed on my car 40k miles ago.

EGR+cooler delete.

 

I'm not getting any symptoms of issues but not monitoring temps either.

 

My car has averaged real world 40.5mpg over that distance which is mainly fast motorway (2000rpm in 6th). It's a 535d LCI on its third remap and sans DPF.

 

I'll live monitor the temps tonight through Carly on my run back up the road. It's a 40 mile fast motorway run.

Assuming 90dec C is my coolant target, what is the engine oil and gearbox oil targets? min and max?

 

I'll leave alone if it doesn't need any attention, but if the numbers are wrong...………….

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This is interesting stuff. [mention=67254]GoNz0[/mention]
 
Both stats were changed on my car 40k miles ago.
EGR+cooler delete.
 
I'm not getting any symptoms of issues but not monitoring temps either.
 
My car has averaged real world 40.5mpg over that distance which is mainly fast motorway (2000rpm in 6th). It's a 535d LCI on its third remap and sans DPF.
 
I'll live monitor the temps tonight through Carly on my run back up the road. It's a 40 mile fast motorway run.
Assuming 90dec C is my coolant target, what is the engine oil and gearbox oil targets? min and max?
 
I'll leave alone if it doesn't need any attention, but if the numbers are wrong...………….
90ish

Sent from my SM-G920F using Tapatalk

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Unfortunately Carly doesn’t seem to log AT temps as a parameter.

 

Coolant and engine oil is fine though and rising/being controlled as you’d expect:

 

 

1809F906-46B3-4262-A7FD-3AD2ED5B124C.png

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Indeed, doesn’t show if the gearbox is getting hot/cold though?Or given the overall coolant temps are good does this mean the gearbox won’t be running cold?

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If the gearbox stat was open it would cause a bypass loop from the rad to the engine as it enters behind the main stat so you would have low engine temps as well. It should remain above 87 doing a constant 50mph

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15 minutes ago, GoNz0 said:

If the gearbox stat was open it would cause a bypass loop from the rad to the engine as it enters behind the main stat so you would have low engine temps as well. It should remain above 87 doing a constant 50mph

 

Right ok, so the engine temps wouldn't come up.

Mine were up to 50 pretty quick, then steadily rose to around 80 over about four miles of town driving, up to 85+ once I got onto open road and sat around 89 unless under constant load/boost where it peaked around 92 before settling back to 89/90. I'd say the complete sytem was working at it should-stats/rads/coolant.

Oil was slower to come up as expected. Staying at about 85 until a good 15 miles had passed which included the four miles of town and the rest under av speed control. Pressing on to 85/90mph and the last 5 degC was found where it sat.

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Did this for my brother's car last week. 

He had mentioned poor mpg and that his gearbox was hanging on to gears, not changing up soon enough.

First thought was the heat exchanger as I had changed the egr and main stats last year for him. Ran car checking temps, highest was 67deg C going pretty hard uphill. Behaviour was classic heat exchanger 'failed' behaviour. Didn't bother clamping off the pipe to confirm!

Got a thermostat (I had bought a second set of clamps when I bought some for myself) and added in to the loop.

Temps are back up to around 90 again and box back to behaving as it should, a bloody great fix. Got it before the dpf started playing up so no extra hassles. It paid for my brother to be monitoring his mpg!

Thanks again guys for a great improvement.

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23 minutes ago, L1011 said:

 

Right ok, so the engine temps wouldn't come up.

Mine were up to 50 pretty quick, then steadily rose to around 80 over about four miles of town driving, up to 85+ once I got onto open road and sat around 89 unless under constant load/boost where it peaked around 92 before settling back to 89/90. I'd say the complete sytem was working at it should-stats/rads/coolant.

Oil was slower to come up as expected. Staying at about 85 until a good 15 miles had passed which included the four miles of town and the rest under av speed control. Pressing on to 85/90mph and the last 5 degC was found where it sat.

Yep sounds perfect. It was an extremely well looked after car as you probably gathered :)

I was so close to buying it but needed an E61.

8 minutes ago, ger said:

Did this for my brother's car last week. 

He had mentioned poor mpg and that his gearbox was hanging on to gears, not changing up soon enough.

First thought was the heat exchanger as I had changed the egr and main stats last year for him. Ran car checking temps, highest was 67deg C going pretty hard uphill. Behaviour was classic heat exchanger 'failed' behaviour. Didn't bother clamping off the pipe to confirm!

Got a thermostat (I had bought a second set of clamps when I bought some for myself) and added in to the loop.

Temps are back up to around 90 again and box back to behaving as it should, a bloody great fix. Got it before the dpf started playing up so no extra hassles. It paid for my brother to be monitoring his mpg!

Thanks again guys for a great improvement.

Just goes to show what a bunch of people can come up with when faced with a problem that can't be fixed by replacing the part :)

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