[Fot] [6pack] tr250 oil pressure issue

[riverside at southslope.net]

It is also very hard to measure what you really need to know which is
the clearance across the parting line.   Micrometers and dial bore 
gauges to the rescue!

art de armond

From: toodamnfunky at comcast.net 
Sent: Wednesday, September 25, 2013 5:38 PM
To: Andrew Packard 
Cc: fot at autox.team.net ; 6pack at autox.team.net 
Subject: Re: [Fot] [6pack] tr250 oil pressure issue

I learned to never trust plastigauge. .0005 too tight on a race motor and it's all over with. A street motor may not care though

but still reading plastigauge can be a matter opinion or interpretation instead of a hard dimension.

Whatever became of the came bearing clearance point I read about, or lack of cam bearings. That seemed the most plausible.

I also read something about a crack in a main casting that caused similar symptoms.

jim g



 



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From: "Andrew Packard" <apackard68 at att.net>
To: 6pack at autox.team.net, fot at autox.team.net
Sent: Wednesday, September 25, 2013 3:50:26 PM
Subject: Re: [Fot] [6pack] tr250 oil pressure issue



I'm the guy with the TR250 oil pressure problem.  I replaced my oil pressure regulator spring with a HD one.  The one I took out measured short and the new one was longer than spec from Bentley.  It helped, but after I got well up to temp, pressure disappeared at idle and water boiled over.  I'm travelling for work this week, so I dropped off my car with my mechanic friend with a new oil pump and some plastic gauge to check the bearing clearance.  I'll find out the status soon.  This is more than a little frustrating with Triumphest starting next week.
Andy



From: Yahoo <brucesimms2003 at yahoo.ca>
To: "6pack at autox.team.net" <6pack at autox.team.net> 
Sent: Wednesday, September 25, 2013 8:22 AM
Subject: [6pack] tr250 oil pressure issue


Did the guy with the oil pressure issue on his new 250 motor ever get this
sorted?  inquiring minds want to know.    

I'm hoping to do a repeat on the
San Diego mechanic with (300,000?) miles on his 250 and never did the bottom
end.  In the Triumph magazine article he said he just does regular oil
changes with STP.    I've shaved the head and a hotter cam so I may have added
additional stress to the engine.  my oil pressure hasn't deteriorated in 16
years of ownerhip.

Cheers,  Bruce Simms 73 tr6

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