280SE M130 engine What goes here? - Mercedes-Benz Forum

 
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post #1 of 5 (permalink) Old 03-08-2012, 06:08 AM Thread Starter
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280SE M130 engine What goes here?

HI
I am undertaking the rebuild of a barn find 1966 250SE Coupe which has a 280SE M130 engine fitted.

There are a couple of tapped holes on the front of the cylinder head and I have no idea what they are for, one of them (the top one) appears to have an oil tube? inside the thread seems odd too an M12 bolt starts in the thread but quickly binds so its either a different M12 pitch or not M12.

Any advise or photos of what I need to find (I still have a box of bits and bobs) would be much appreciated.
I have attempted to attach photos.

Thanks

280SE M130 engine What goes here?-2012-03-07-18.10.57.jpg

280SE M130 engine What goes here?-2012-03-07-18.11.04.jpg
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post #2 of 5 (permalink) Old 03-08-2012, 06:42 AM
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AC bracket mounts

Those holes are for a AC compressor bracket
I believe the small line is a bypass for the thermostat?
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post #3 of 5 (permalink) Old 03-08-2012, 08:04 AM Thread Starter
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Ok thanks, I havent got AC so I wont need to use them but I think something should go in the top hole at least to blank it off will check out a couple of different pitch M12 screws.
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post #4 of 5 (permalink) Old 03-08-2012, 08:14 AM
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On my m180, that hole did indeed secure the AC bracket. However, the pin for the chain tensioner is also in there, so you need to put some kind of plug in that hole.

When I removed my AC bracket, I had oil weeping out so I plugged it. Put a sealant on the threads. It is a 1.5 pitch. It may be that the threads are buggered or the pin has worked its way out of its seat and is resisting the bolt. When I installed the plug, it threaded about a half inch before bottoming.

1981 300TD--310k miles
1970 280sel--172k miles
1966 230--162k miles
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post #5 of 5 (permalink) Old 03-08-2012, 08:31 AM Thread Starter
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I knew there was something in there that makes sense I only have a fine thread M12 to hand will look out a 1.5 pitch and try that the threads look OK
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