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Ouch! (Well almost)
Posted: Wed Mar 17, 2010 8:27 pm
by MMaurice52
Having assembled and installed the SV engine in my MM and confirmed the new engine is OK I decided to start rebuilding the other engine I have. I found this in the cooling system:
I then remembered I had one just like it, left over from the engine rebuild that is now in the MM!
So I removed the coolant side cover:
and installed the brass thinghy where it belongs. I imagine it was to restrict the coolant flow from such a large hole?

Re: Ouch! (Well almost)
Posted: Wed Mar 17, 2010 9:26 pm
by alanworland
It guess it must be to restrict water flow. I wonder if you only have it with a pumped system?
I dont remember one being fitted to my unpumped system - and I didn't fit one when I fitted the pump!
The only thing I found in my block water ways was what looked like a nail! I think it was left over from the sand casting process!
Lovely looking Alta!
Re: Ouch! (Well almost)
Posted: Wed Mar 17, 2010 9:28 pm
by mike.perry
PM sent
Re: Ouch! (Well almost)
Posted: Thu Mar 18, 2010 12:08 am
by MMaurice52
alanworland wrote:It guess it must be to restrict water flow. I wonder if you only have it with a pumped system?
I dont remember one being fitted to my unpumped system - and I didn't fit one when I fitted the pump!
The only thing I found in my block water ways was what looked like a nail! I think it was left over from the sand casting process!
Lovely looking Alta!
Alan,
Both the un-pumped and pumped engines had the part. The original engine in my MM was un. I installed a water pump from the engine that was pumped.
I can take measurements and send them. Or I can fabricate one from brass if you would like.
LMK
Marc
Re: Ouch! (Well almost)
Posted: Thu Mar 18, 2010 3:02 am
by mike.perry
It should be in all USHM3 engines but of course not in USHM2 engines. I think it fell out of my previous engine when I took the water jacket off. I originally thought it was some sort of spring tensioner. I had better check that there is one in my engine when it is stripped.
Re: Ouch! (Well almost)
Posted: Thu Mar 18, 2010 9:39 am
by alanworland
Thanks Mark, but I reckon that as I have done 80,000 miles without it, it should be ok for a bit more!