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Re: [TR] start up problems??

To: dorpaul@negia.net, triumphs@autox.team.net
Subject: Re: [TR] start up problems??
From: Dave1massey@cs.com
Date: Sat, 29 Apr 2006 10:18:09 EDT
In a message dated 4/28/2006 10:12:12 PM Central Standard Time, 
dorpaul@negia.net writes: 
> My oil pressure has been weak in my newly (professionally) &fully rebuilt
> engine and today it went under 10-20psi, so I immediatly cut it off..  I'm
> wondering what might be the cause.
> It's got 20W-50 oil,
> eng temp never got over 185 degrees,
> (both water temp and oil pressure gauges watched closely),
> it averaged 3000 rpm's over the 10 minutes it ran,
> for most of that time it held on 40 psi of oil pressure.
> 
Are you saying the oil pressure when cold was only 40 PSI?  If so I seriously 
doubt it is an internal problem in the engine.  When cold the engine should 
easily achieve pressure release valve pressure even on a very loose engine.  
Either the pressure relief valve is opening too low or there is a fault in the 
pressure gauge sensing system.

I would:
1) Change the oil filter, it may be plugged.
2) Check the oil pressure relief valve for a broken spring, stuck piston or 
misadjustment.
3) Connect a different gauge and verify that the reading is accurate (or 
not).
4) Disconnect any external head oiling system you may or may not have 
installed.

Dave


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