I had a similar problem several years ago. New rod bearings and a rebuilt
oil pump fixed my problem. Look at your oil pump bottom cover very closely.
If it is gouged or has wear marks have it resurfaced flat. Remove those wear
rings or gouges. Check the side clearances too and if necessary replace the
rotor and pump ring. Oil pressure will return nicely.
Jerry Van Vlack
----- Original Message -----
From: "John & Pat Donnelly" <pdonnel1@san.rr.com>
To: "'Mark J Bradakis'" <mark@bradakis.com>; <triumphs@autox.team.net>
Sent: Wednesday, September 02, 2009 9:33 AM
Subject: Re: [TR] Low Oil Pressure and Engine Noises
> Thanks Mark. I plan to work on the engine this weekend. I'll start with
> the
> rocker shaft first, then the bottom end.
> When cold, idle is at 20, and goes to 70 as revs increase. After water
> temp
> comes up to normal the pressure starts dropping. After running for 15
> minutes idle pressure is almost 0, and at 3000 rpm it's 35.
> I used to run the oil pressure on the high side, up around 90, and had it
> that way for years. Now it's at 70. But, it's only been in the last year
> that I've noticed the pressure dropping after reaching running temp.
> One of the sounds could be valve train related. It makes a tin type noise,
> like a small metal piece rattling around or hitting something. It's not
> rhythmic or in sync with engine speed, but rather a constant rattle.
> Another sounds like a shaft wobbling around, sort of like a journal is too
> big. This one happens as I let off the throttle. It's not as fast as the
> engine speed, maybe the camshaft?
> The engine has plenty of pep, and is as fast as I've ever had it in 40
> years. The engine went through a total rebuild 8 years ago and has about
> 40K
> miles on it. I have my reservations for TFest and want to make sure I make
> it, so I need to tackle this problem now.
> Johnnie
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