[TR] TR6 issue

[dave]

How about a quart per fillup?

 

And I totally disagree that these engines need to use oil.  My engine was rebuilt by an excellent mechanic, and it uses practically no oil.  

 

I almost never have to add oil.  And we drive it hard.  

 

 

From: DAVID MASSEY <dave1massey at cs.com> 
Sent: Thursday, November 11, 2021 7:50 PM
To: dave at ranteer.com; triumphs at autox.team.net
Subject: Re: [TR] TR6 issue

 

What is meant by "Engine uses a lot of oil?"  These things are notorious for using a lot of oil.  The factory once said that a quart every 600 miles is "normal."  But that was probably an effort to get out of some warranty work.  

 

I seem to recall that a puff of blue smoke on acceleration was blow-by, (i.e. rings)

 

I rebuilt a TR6 engine that ran great but lost a quart every 300 miles.  A co-worker who used to work for TRW in the piston ring department said that I may have installed the rings upside down.  He said they were not symmetrical and applied more pressure on the bottom edge to better scrape any oil on the cylinder walls to reduce consumption.  

 

I bought a used engine to drive while I rebuilt this one.  This used engine is still in the car 30 years later (I never rebuilt that engine) and looses a quart every 1300 miles or so.  Some times it is best to leave well enough alone.

 

Dave 

 

 

-----Original Message-----
From: dave <dave at ranteer.com <mailto:dave at ranteer.com> >
To: triumphs at autox.team.net <mailto:triumphs at autox.team.net> 
Sent: Thu, Nov 11, 2021 8:56 am
Subject: [TR] TR6 issue

I have a friend who has a 74 TR6.  Recent rebuild of the engine both top and bottom.  We are a little suspicious of the machine shop that did the head.  The bottom end was done a year later by a different machinist.

 

All pollution stuff is gone.

 

Compression across all 6 cylinders is within a couple PSI

 

Leakdown test was a small % on all cylinders

 

Engine uses a lot of oil and there is a blue puff when he accelerates or engine brakes

 

We think its likely the valve guides are leaking.

 

What do you think?

** triumphs at autox.team.net <mailto:triumphs at autox.team.net>  **

Donate: http://www.team.net/donate.html
Archive: http://www.team.net/pipermail/triumphs  <http://www.team.net/pipermail/triumphs> http://www.team.net/archive

Unsubscribe/Manage: http://autox.team.net/mailman/options/triumphs/dave1massey@cs.com

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/triumphs/attachments/20211112/b24b144d/attachment.htm>