[TR] Setting valves Procedure

[Alex & Janet Thomson]

Except for small, air-cooled engines that may have an automatic compression release mechanism built into the cam shaft (either in the cam grind or as a centrifugal device), I always taught my shop students that you can never go wrong by bringing each cylinder up to TDC-compression and then adjust the valves for that cylinder. There are often a variety of short-cuts where a manufacturer will tell you to adjust certain valves at TDC - Compression of #1 cylinder and then the rest of them at TDC – Exhaust #1 cylinder but those are engine specific. Most 4 cylinder engines have a firing order of 1-3-4-2, so if you see “valve rock” (exhaust closing, intake opening) on # 1 cylinder, you know that #4 is at TDC – compression and its valves can be adjusted. Then, turn the crankshaft a half turn ( total number of cylinders divided by 2), and adjust the next cylinder in the firing order which would be #2. Then 1. Then 3.  Distributor rotor position on a gas engine will help you figure out who is at TDC – compression. Diesels don’t have that option, other than pump timing marks for #1 cylinder. Look in your shop manual for details.

 

Alex Thomson

 

From: Triumphs [mailto:triumphs-bounces at autox.team.net] On Behalf Of Paul Dorsey
Sent: Tuesday, September 18, 2018 6:33 PM
To: Triumph list Team.net
Subject: [TR] Setting valves Procedure

 

 Is there a universally excepted method by which to  adjust the  valves for A  TR three? I know when I asked about this  before that Randall sent me a link to a bunch of articles but I don’t think any of them  concern setting The valves.  Where can I learn to do this?

 

Thanks, Paul Dorsey TR three 1960

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