E24 Windshield Nozzles - Heated/Non

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gte619n
Posts: 128
Joined: Wed Aug 05, 2015 8:30 pm
Location: Atlanta, GA

E24 Windshield Nozzles - Heated/Non

Post by gte619n »

Guys,

I am finally redoing my windshield cleaning system. The current system was very hacked up by the PO and I'm planning on restoring everything to stock. I have uncovered a few inconsistencies and was hoping for some guidance.

The car is a 1985 M35CSi. I assumed I had the non-heated nozzles but after removing all the broken and crusty old pieces, I've found wiring that would indicate I have heated nozzles. The current nozzles are absolutely clogged and gone so I need to order new nozzles.
  • Is the presence of wiring an indication that I have the heated nozzles?
  • If not, was this an option that was available, and, if so, can I check through my VIN decode?
  • Do the heated and non-heated nozzles have the same mounting?
  • Are the heated and non-heated nozzles interchangeable?
  • How is the heating function wired? All my wiring is cut and missing at the engine side. If I have to rebuild, are there good sources for the heaters and the light in that location or is it a bigtime effort?
Thank you so much for any advice and pointers! The forum has been amazing to help me order the correct valves and splitters and I can't wait to have this done!
Evan Ruff, Atlanta GA, Engineer
1970 Ford F100
1972 BMW 3.0CSi, L-Jet 3.5L
1978 Ferrari 308GTB
1985 BMW M635CSi
2016 BMW M2
plip1953
Posts: 400
Joined: Mon Aug 13, 2018 4:15 pm
Location: Leeds

Re: E24 Windshield Nozzles - Heated/Non

Post by plip1953 »

gte619n wrote: Sat May 16, 2020 6:54 pm
  • Is the presence of wiring an indication that I have the heated nozzles?
Almost certainly imo
  • If not, was this an option that was available, and, if so, can I check through my VIN decode?
You can check all the right parts for your car on RealOEM - ie by VIN Code
  • Do the heated and non-heated nozzles have the same mounting?
Yes
  • Are the heated and non-heated nozzles interchangeable?
Almost certainly so EDITED - but apparently that's not so - see Ron's post below.
  • How is the heating function wired? All my wiring is cut and missing at the engine side. If I have to rebuild, are there good sources for the heaters and the light in that location or is it a bigtime effort?
I think this will be the tricky part as I don't know exactly what triggers their operation - I don't think the heating element is permanently active. What light are you referring to? The light on the underside of the bonnet/hood panel?
Last edited by plip1953 on Sun May 17, 2020 3:16 pm, edited 1 time in total.
Phil
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ron
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Re: E24 Windshield Nozzles - Heated/Non

Post by ron »

The cutouts in the bonnet (hood) are different sizes for the heated/non-heated nozzles.

Please post a pic of yours and I'll confirm which type you have.
They are ALWAYS rustier than you thought!!!!!!
'85 M #228
'87 M #367
'88 High line.
'10 X5
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ron
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Re: E24 Windshield Nozzles - Heated/Non

Post by ron »

gte619n wrote: Sat May 16, 2020 6:54 pm
  • Do the heated and non-heated nozzles have the same mounting?
  • Are the heated and non-heated nozzles interchangeable?
The cutouts in the bonnet (hood) are different sizes for the heated/non-heated nozzles.

Please post a pic of yours and I'll confirm which type you have.
They are ALWAYS rustier than you thought!!!!!!
'85 M #228
'87 M #367
'88 High line.
'10 X5
‘84 Alfasud 1.5 ti
gte619n
Posts: 128
Joined: Wed Aug 05, 2015 8:30 pm
Location: Atlanta, GA

Re: E24 Windshield Nozzles - Heated/Non

Post by gte619n »

Hey Guys,

Thank you so much. Here are some shots of the cutout for the nozzle from the top and the bottom. It looks... altered to me.

Image

Image

RealOEM shows this car having heated nozzles so any clarification would be helpful!

Thank you,

E

PS. Does anyone have a PN for the check valve brackets? Mine are completely decimated.
Evan Ruff, Atlanta GA, Engineer
1970 Ford F100
1972 BMW 3.0CSi, L-Jet 3.5L
1978 Ferrari 308GTB
1985 BMW M635CSi
2016 BMW M2
ron
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Joined: Sat Jul 10, 2004 11:35 am
Location: South Wales U.K.

Re: E24 Windshield Nozzles - Heated/Non

Post by ron »

Someone has "butchered" that. From the size of the cut-outs on the underside you don't have heated nozzles.

I think the cut-outs on the top face of the bonnet are the same for heated and non-heated nozzles.

This is the size of the cut-out on the lower face for the R/H heated nozzle.
P1030067.JPG
P1030067.JPG (4.71 MiB) Viewed 7250 times
This is the size of the cut-out on the lower face for the L/H heated nozzle.
P1030069.JPG
P1030069.JPG (4.48 MiB) Viewed 7250 times
They are ALWAYS rustier than you thought!!!!!!
'85 M #228
'87 M #367
'88 High line.
'10 X5
‘84 Alfasud 1.5 ti
plip1953
Posts: 400
Joined: Mon Aug 13, 2018 4:15 pm
Location: Leeds

Re: E24 Windshield Nozzles - Heated/Non

Post by plip1953 »

Not really relevant to this subject matter, but would are these small posts (circled) intended for?
Attachments
Under bonnet.jpg
Under bonnet.jpg (54.02 KiB) Viewed 7246 times
Phil
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gte619n
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Location: Atlanta, GA

Re: E24 Windshield Nozzles - Heated/Non

Post by gte619n »

Phil,

Those little posts are for the plastic bracket that retains the check valves. Mine are almost completely gone and I'm looking for the part number to order replacements. Does anyone happen to know that P/N? I am having some difficulty finding it on RealOEM, as they don't seem to be pictured with the other pieces.
Evan Ruff, Atlanta GA, Engineer
1970 Ford F100
1972 BMW 3.0CSi, L-Jet 3.5L
1978 Ferrari 308GTB
1985 BMW M635CSi
2016 BMW M2
plip1953
Posts: 400
Joined: Mon Aug 13, 2018 4:15 pm
Location: Leeds

Re: E24 Windshield Nozzles - Heated/Non

Post by plip1953 »

gte619n wrote: Mon May 18, 2020 5:59 pm Phil,

Those little posts are for the plastic bracket that retains the check valves. Mine are almost completely gone and I'm looking for the part number to order replacements. Does anyone happen to know that P/N? I am having some difficulty finding it on RealOEM, as they don't seem to be pictured with the other pieces.
Ok, but what purpose do these check valves serve? Something specific for US models?
Phil
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1988 Highline 635 CSi
baders
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Re: E24 Windshield Nozzles - Heated/Non

Post by baders »

Check valves are on all windscreen washing systems. Otherwise the water would drain back out of the tubing to the reservoir.
1986 635csi LOCUTUS / Arktis Blau Metallic / Pearl Beige / S38B36/ Close ratio dogleg 5sp
2002 E46 M3 / Topaz Blau Metallic / Black Nappa / 6 speed SMG software tuned / Bilstein PSS10 Coilovers / CMP RACP reinforcement
plip1953
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Location: Leeds

Re: E24 Windshield Nozzles - Heated/Non

Post by plip1953 »

baders wrote: Tue May 19, 2020 1:49 am Check valves are on all windscreen washing systems. Otherwise the water would drain back out of the tubing to the reservoir.
Hmm, that's a good point! I'm almost certain the arrangement in my pic above is how it's been since new, although on closer inspection there doesn't seem to be any fluid in any of the tubing above the level of the reservoir! That said, I can't ever remember experiencing any kind of a delay after operating the washer switch, but I guess there has to be.

Do you have any pics of the check valves and pipework in position?
Phil
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1988 Highline 635 CSi
gte619n
Posts: 128
Joined: Wed Aug 05, 2015 8:30 pm
Location: Atlanta, GA

Re: E24 Windshield Nozzles - Heated/Non

Post by gte619n »

Evan Ruff, Atlanta GA, Engineer
1970 Ford F100
1972 BMW 3.0CSi, L-Jet 3.5L
1978 Ferrari 308GTB
1985 BMW M635CSi
2016 BMW M2
plip1953
Posts: 400
Joined: Mon Aug 13, 2018 4:15 pm
Location: Leeds

Re: E24 Windshield Nozzles - Heated/Non

Post by plip1953 »

gte619n wrote: Tue May 19, 2020 10:35 am Check out JCS's post here: http://bigcoupe.com/phpBB2/viewtopic.php?t=2247
Many thanks for that. So it looks like there are different configurations depending on the year of car, or it is a difference depending on heated or non-heated nozzles?
Attachments
Washer valve pic.jpg
Washer valve pic.jpg (99.19 KiB) Viewed 7189 times
Untitled.jpg
Untitled.jpg (71.59 KiB) Viewed 7189 times
Phil
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1988 Highline 635 CSi
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