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Re: Oil Pressure [Re: eelmgren] #749089
09/14/18 12:15 am
09/14/18 12:15 am
Joined: Jan 2014
Posts: 3,993
Aus
N
NickL Online content
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NickL  Online Content
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Joined: Jan 2014
Posts: 3,993
Aus
If you can get bigger than a 2 thou feeler gauge into the bush/crank journal when cold, the clearance is too big.


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Re: Oil Pressure [Re: eelmgren] #749099
09/14/18 1:19 am
09/14/18 1:19 am
Joined: Mar 2006
Posts: 1,351
Magnolia, TX
htown Offline
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htown  Offline
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Joined: Mar 2006
Posts: 1,351
Magnolia, TX
See page 40 in this mag for an article on how to check the clearance. Very easy to do and will give you peace of mind that it is correct. But if you would rather spend days debating with people on here that's your option.
https://books.google.com/books?id=g...amp;q=measuring%20bsa%20bush&f=false

Last edited by htown; 09/14/18 1:22 am.

1978 Bonneville T140E
1974 Trident
1970 BSA Thunderbolt
1971 Norton Commando
1972 Norton Commando
1973 Norton Commando
1974 Norton Commando
2004 XL 1200R Sportster

Everything will be alright in the end. If its not alright, its not the end.
Re: Oil Pressure [Re: eelmgren] #749276
09/15/18 3:00 pm
09/15/18 3:00 pm
Joined: Sep 2014
Posts: 84
GA
E
eelmgren Offline OP
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eelmgren  Offline OP
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E
Joined: Sep 2014
Posts: 84
GA
In all fairness, the dirty oil pump was on me. My engine guy only had the case halves, crank, cam and con rods.

I don't have the time now so this project will get pushed to the back of the garage once again. I'm putting it back together and will run it to see if cleaning and reassembling the oil pump made any difference at all, but I am starting to suspect the bush wasn't reamed correctly.

I put the pump and inner timing cover back on yesterday. Today I opened the timing hole on the front of the engine case and oil flowed out. Does this mean the oil pump check valve didn't seat?

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