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<div> <font size="3">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. <br>
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<div><font size="3">I seem to recall that a puff of blue smoke on acceleration was blow-by, (i.e. rings)<br>
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<div><font size="3">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. <br>
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<div><font size="3">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.<br>
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<div style="clear:both"><font size="4">Dave </font><br>
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<div style="font-family:arial,helvetica;font-size:10pt;color:black"><font size="2">-----Original Message-----<br>
From: dave <dave@ranteer.com><br>
To: triumphs@autox.team.net<br>
Sent: Thu, Nov 11, 2021 8:56 am<br>
Subject: [TR] TR6 issue<br>
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<div class="yiv3123217294MsoNormal">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.</div>
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<div class="yiv3123217294MsoNormal">All pollution stuff is gone.</div>
<div class="yiv3123217294MsoNormal"> </div>
<div class="yiv3123217294MsoNormal">Compression across all 6 cylinders is within a couple PSI</div>
<div class="yiv3123217294MsoNormal"> </div>
<div class="yiv3123217294MsoNormal">Leakdown test was a small % on all cylinders</div>
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<div class="yiv3123217294MsoNormal">Engine uses a lot of oil and there is a blue puff when he accelerates or engine brakes</div>
<div class="yiv3123217294MsoNormal"> </div>
<div class="yiv3123217294MsoNormal">We think its likely the valve guides are leaking.</div>
<div class="yiv3123217294MsoNormal"> </div>
<div class="yiv3123217294MsoNormal">What do you think?</div>
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