How do you know?Quote:
Originally Posted by 70SATMan
How do you know?Quote:
Originally Posted by 70SATMan
Years of looking at original parts on original cars??Quote:
Originally Posted by blue72s
Could have been 72/73 when the small reflector was added but, on the original LWBs through 71, I've not seen the small reflector in the units. I could look at part numbers in my original 69-73 parts manuals I guess. I still have that NOS Euro unit that never had that small reflector but, has the running light bulb and separator plate. Matter of fact, all of the Euro units I've had over the years were without the small reflector. The earliest original spare units (in period) had the grey seals like my unit. Later production changed to the black seals. Maybe the box has some dates on the tags..
Back home. So I checked some turn signal housings and the marron books.
My NOS 331 dated November 73 housing that I purchased in Italy has allready the part number 911 631 402 31 on a sticker with the Bosch number 0 311 450 403.
It comes without the small reflector and close to the main/turn bulb is written 32/3 CP.The 3 is stamped different.
MY 10/71 German spec viperngreen has no small reflector.
The marron 72/73 parts book says that the change from 901 to 911 numbers had been 7/72.
A later sticker 911.... version housing that I sold recently had the small reflector.
I guess the small reflector was a 73 only ROW thing.
Thanks Michael and Dirk. Brilliant thread.
Keep 'em coming.
Is the Italian wiring harness at the back of the housing different to the ROW version? If so, can it be modified easily?
It is getting better, spare parts catalog for MY 1972 model shows 901 and 911 numbers for the housing; EUROPE except Italy 911.631.401.03 and 402.03. Italy 911.631.401.05 and 402.05 and US 901.631.401.04 and 402.04. Looks like these are complete units with seal and lens (plus wiring?). I need to check the other years, 69, 70 and 71 to see if there are any 901 numbers for Europe and Italy.
Spare parts catalog 72/73 has more info and that is probably related to the use of silver and black trimmed lenses, both available. Now the bare housings without lenses/seal have their own part numbers: 911.631.935.00 / 936.00 EUROPE, 937.00 / 938.00 Italy and 939.00 / 940.00 USA. Complete units still have the same part numbers as for MY72.
I think the Italian wiring harness is the same as for Europe harness..may be an extra wire loom as discussed before.
Cees
PS For MY1971 there are .07 units for Norway, Denmark and Japan...to make it even more interesting..
Would be nice to see the period Bosch catalogs.
My 72/73 manual is the same. My 69 manual (7/69):Quote:
Originally Posted by fourteenten
901.631.401.03 Euro except Italy
901.631.401.04 US
901.631.401.05 Italy
The ironic thing is that I don't have a true '70 parts manual set (for my car). I have the '69, '71 and 72/73.
'71 manual lists the same 901.631.401.04 part number for US and 901.631.401.05 Italy but, transitioned to the 911 prefix for Euro, go figure but, they did that with a lot of parts starting in '71.
All of the NOS blinker units I've had were complete with the wiring and lens like stated in the manual. The obvious difference between the Euro and Italy that would drive a part number difference is the lens but, that does not discount the possibility that the harnesses weren't also different between the two.
I really need to sit down and pour over the electrical diagrams more, preferably while pouring an Arrogant Bastard.:)
What about the bright silver on the inside of the housing? Did all years have it except Italian?
Hi Michael,
I am not sure if an 'only 1970' spare parts manual exists. My 3 volume edition 1968 is for both 1969 and 1970.
My front Italian units are silver inside.
Cees
Bright or matt? I have a NOS Italian front right unit and it looks exactly the same as OP's in post #1 - No bright silver inside.Quote:
Originally Posted by fourteenten
If it's matte, then I suspect oxidation. It happens with the aluminium coatings. Similar to reflectors on light units like our TTG lights, fog lights and headlights. When first made, I'm sure it was shiny.Quote:
Originally Posted by blue72s
Don't try to manually polish it, it's so thin that you'll go through and just make it worse. One trick I used to use on light reflectors was a solution of isopropyl alcohol with just a little salt added. I would swirl the solution around in the reflector and empty. Not 100% back to original but, usually a solid improvement. The grains of salt provide the barest of abrasion to remove the oxidated layer. Better than using paint or chroming. Chrome is actually one of the worst things. It's far less reflective than one would think.
My 69 parts manuals' cover sheets just state '69 and not 69/70 model year. So, I should be looking for a three binder set then for MY '70? I assumed it would be a single binder like the '71 manual.
No wonder I haven't found it, LOL.