New replacement thermal bulb for AAV available

John_John1 · October 16, 2018, 8:42am

Managed to source new replacement thermal bulb for Auxiliary Air Valve. They are exactly the same as originals. There where 5 available so bought them all Few pictures (old on left, new on the right):

Have tested new and old bulbs. Pins are the same height when cold but when warmed up, new extends longer:

Also new bulb is much more responsive to temperature changes then old one.
Will have to work out the scheme how to put everything back together

RGK20m3 · October 16, 2018, 10:27am

Where on Earth did you find them???

John_John1 · October 16, 2018, 10:51am

Seek, and you shall find
Actually I found them by accident in one of the small local shops selling new old stock parts for order vehicles. They had 5pcs but didn’t know what these are for… Didn’t hesitate before I bought all of them

RGK20m3 · October 16, 2018, 12:17pm

Is there any identifying markings either on the part or packaging? I wish I had luck like that!

John_John1 · October 16, 2018, 1:31pm

Bulbs where in a plastic bag and judging on the sticker it is “Bosch” part, but the sticker is dammaged and part of the part number is missing. I’m investigating what they where used for and if they are still available. Will post my findings here.

RGK20m3 · October 16, 2018, 4:27pm

I, along with many Jag-Lovers, appreciate your efforts!

John_John1 · October 16, 2018, 5:38pm

Found it! I think this one should go into Kirby Palm’s book :)))
Bosch part number: 1 287 230 002
This thermostat bulb was used in Bosch
mechanical fuel injection (MFI) units. And it is still available from http://www.bosch-classic.com/ although a bit pricey same thermostat bulbs where used in AAV for Mercedes-Benz engines of same era.

BobboSD · October 16, 2018, 8:07pm

I found the page showing the part. How did you find the price?

Thanks

Bob

http://www.bosch-classic.com/en/internet/bosch_classic/produkte/motor_1/thermostat__mechanische_benzineinspritzung/thermostat___mit_teaser_1.html

John6 · October 16, 2018, 9:13pm

Yucky price!

beachcar5 · October 16, 2018, 10:23pm

Yes, they all seem to be in the $87 to $107 range on ebay.

beachcar5 · October 16, 2018, 10:39pm

Looking at the MB part number gave better results:
https://www.pelicanparts.com/More_Info/0012039575.htm?pn=001-203-95-75-M322

sbobev · October 16, 2018, 11:49pm

Great find. The MB p/n cross-references with W0133-1630030. They can be had for less than $20

Aristides · October 17, 2018, 12:14pm

Briliant !!
A historic find…

John_John1 · October 26, 2018, 1:23pm

Rebuild work in progress…

beachcar5 · October 26, 2018, 1:56pm

John, as usual, that looks very nice.

Aristides · October 26, 2018, 2:56pm

Yes, I see some John_John action there !!

John_John1 · October 26, 2018, 4:33pm

Thanks guys I’m almost finished with mounting ring for new wax bulb. Will need a C-clip and O-ring for final assembly, but that will have to wait for next week as I have to do some shopping

speedking · October 29, 2018, 10:03am

Thank you for the worthful information.
I hat problems finding one, so I had to buy the whole AAV.
But now I know

beachcar5 · October 29, 2018, 1:59pm

John,
How did you get the AAV apart?

John_John1 · October 29, 2018, 2:20pm

You just press from the top on the outlet till the part with wax bulb falls out, then you take out piston and spring and press the remaining part the other way.