Author Topic: thermostat housing 250SL  (Read 4158 times)

BLTZKRG

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thermostat housing 250SL
« on: November 08, 2018, 23:15:10 »
Car has been sitting since Julius Caesar was a young lad, the thermostat housing has corroded beyond saving, I need a replacement, can anyone help?

exact10@me.com


hkollan

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Re: thermostat housing 250SL
« Reply #1 on: November 09, 2018, 00:42:58 »
Hi,

Yes, the part is available new at the dealer or classic center.
The New part # is 1272030974. Not too expensive.

Hans
Hans K, Cuenca, Spain
1968 280 SL 387 Blue met., parchment leather
1971 280 SL 462 Beige met, Brown leather
1968 280 SL 180 Silver, Red leather
1964 300 SE Lang 040 Black w/Red leather
1985 500 SL 735 Astral Silver w/Black leather
1987 560 SEC 199 Black met., Black leather

Atazman

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Re: thermostat housing 250SL
« Reply #2 on: November 09, 2018, 02:02:51 »
This part number (1272030974) has the plug in the top for filling/venting.
Don
67 250 Sl
(#3168) from Italy
5-speed/Posi/AC/Kinder

mbzse

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Re: thermostat housing 250SL
« Reply #3 on: November 09, 2018, 09:36:45 »
Quote from: Atazman
This part number (1272030974) has the plug in the top for filling/venting
See pictures in this thread
https://www.sl113.org/forums/index.php?topic=28196.msg204913#msg204913
/Hans S

BLTZKRG

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Re: thermostat housing 250SL
« Reply #4 on: November 10, 2018, 17:03:25 »
I have the new part with the plug vent, got it from Tom Hansen, but I want an original without the vent

ejboyd5

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Re: thermostat housing 250SL
« Reply #5 on: November 10, 2018, 18:28:58 »
With time, effort and some JB Weld you might well restore that part to functionality.  I'd start with a thin metal sleeve to maintain the inside diameter, then layer JB Weld to restore the outside diameter, then smooth to a final finish.  Most, if not all, of your repair would be covered by the coolant hose and originality would be prserved.

mrfatboy

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1969 280sl (Aug 1968 build)
Signal Red
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BLTZKRG

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Re: thermostat housing 250SL
« Reply #7 on: November 11, 2018, 01:44:23 »
Thanks but that's the one with the plug in it, I already have that

mrfatboy

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Re: thermostat housing 250SL
« Reply #8 on: November 11, 2018, 01:56:03 »
The hole is not drilled for the plug but it is prepped for late 280sl's.

My early 280sl is same.  See pic.  But as i do see the 250's don't have the pre hole form in the housing.

I didn't realize there were at least 3 versions.  I'm not sure what the 230's look like.

1969 280sl (Aug 1968 build)
Signal Red
4 Speed

steves sl

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Re: thermostat housing 250SL
« Reply #9 on: November 11, 2018, 15:15:09 »
Enclosed are 2 pic's of the housing on an early 230sl.....recently added a/c compressor.
S. Schlaefer

Jonny B

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Re: thermostat housing 250SL
« Reply #10 on: November 11, 2018, 15:38:55 »
The replacement part number is listed as 127 203 09 74 in the last engine parts book (Jan 1971) it also lists the plug and seal ring.

The thermostat cover part is listed as 127 203 05 74 in the 250/280 SL engine books, with 127 203 07 74 listed in all the 230 SL books.
Jonny B
1967 250 SL Auto, DB 568
1970 280 SL Auto, DB 904
1966 Morris Mini Minor

specracer

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Re: thermostat housing 250SL
« Reply #11 on: November 11, 2018, 17:20:52 »
Have you called this company?

https://eurocarspartz.com/

mbzse

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Re: thermostat housing 250SL
« Reply #12 on: November 11, 2018, 18:06:23 »
Quote from: Jonny B
.../...The thermostat cover part is listed as 127 203 05 74 in the 250/280 SL engine books.../...
This is what I have in my original 280SL (Late spring 1968 delivery). This is the smooth type lid (no "plug prep" in alloy casting)
/Hans S

Garry

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Re: thermostat housing 250SL
« Reply #13 on: November 11, 2018, 20:39:05 »
Here is mine on my 65 230 sl.  A different angle.


Garry
« Last Edit: November 11, 2018, 20:44:04 by Garry »
Garry Marks
Melbourne/ Kyneton, Brisbane. Australia
1969 MB 280SL 5 speed RHD SOLD.
1965 MB 230SL Auto RHD Lt Blue 334G, Top 350H, 213 Leather, Tourist Delivery.
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BLTZKRG

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Re: thermostat housing 250SL
« Reply #14 on: November 12, 2018, 00:29:42 »
Beautiful Gary, post some outside pics, looks fabulous, I love my car, it has to be one of the most original 250SLs left, but I'd swap it for a restored 280SL!

Tyler S

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Re: thermostat housing 250SL
« Reply #15 on: November 12, 2018, 00:32:14 »
These replacements with the undrilled port for the temp switch were cast this way to alleviate the need for 2 different castings. The later casting was used for the earlier housings and simply not drilled out.
1968 (67) 250sl. 4 speed manual. DB180 Silver
1955 220 Cabriolet A. White Grey
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mrfatboy

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Re: thermostat housing 250SL
« Reply #16 on: November 12, 2018, 00:48:18 »
Here is a picture of what Tyler is talking about.

1969 280sl (Aug 1968 build)
Signal Red
4 Speed