[TR] TR4 road draft tube plug

Wed Sep 9 08:31:41 MDT 2015

John, do you -- or anyone else -- know of any diesel-engined TRs (!) over
the years?  Somebody's probably done it at some point...

On Wed, Sep 9, 2015 at 8:48 AM, John Macartney <john.macartney at ukpips.org.uk
> wrote:

> The wet liner four was used in:
>
> All TR models from TR2 to TR4A
> Triumph Renown
> Triumph Roadster
> All Standard Vanguards from 1948-1959/60 before being replaced by the 2
> litre six pot in the Vignale
> There was also a Vanguard diesel variant in the mid 50's for car, van and
> pick-up
> The Ferguson Tractor (in modified forms)
> Standard Ensign in 1.6 and 2.1 litre variants
> Leyland 15 and 20 revamps of the (ghastly) Standard Atlas van / pick-up /
> Minibus
> Rover SD1 made in India
> Morgan
> Swallow Doretti
> Warwick
>
> And as an industrial power unit for trailer compressors, concrete mixers,
> stand-by generators and pedestrian controlled road rollers - all of which
> were as normally aspirated diesels.
>
> Jonmac
>
>
> -----Original Message-----
> From: Triumphs [mailto:triumphs-bounces at autox.team.net] On Behalf Of Brad
> Kahler
> Sent: 09 September 2015 14:02
> To: Dave <dave1massey at cs.com>
> Cc: Triumphs <Triumphs at autox.team.net>
> Subject: Re: [TR] TR4 road draft tube plug
>
> I forgot the TR3/4 engine was also used in a few other Triumph models.
> Maybe Andy Mace will chime in with his knowledge of the other Triumph
> models.
>
>
>
> On Tue, Sep 8, 2015 at 10:10 PM, Dave <dave1massey at cs.com <mailto:
> dave1massey at cs.com> > wrote:
>
>
>         Well, of course the upper part isn't sealed from the lower.  The
> oil pumped to the rockers has to drain back down somehow.  As was mentioned
> previously, it goes through the push rod tubes.
>
>         My guess is that the cover is used in other applications
> (Vanguard?) and whatever it was for was not implemented on the TR.  Not
> enough space under the hood.
>
>
>         Dave Massey
>
>
>         -----Original Message-----
>         From: Brad Kahler <bkahler1 at gmail.com <mailto:bkahler1 at gmail.com>
> >
>         Subject: Re: [TR] TR4 road draft tube plug
>
>
>         Alan,
>
>         So much for the official Triumph documentation!
>
>         Does anyone know why the real early TR4s (and I think late TR3Bs)
> had the brass plug in the top of the valve cover?  I've never seen anything
> relating to that plug written anywhere.
>
>         I don't think the bottom end can be completely sealed due to the
> openings for the push rods.  When the switch was made to the "sealed"
> system the draft tube went away for good.
>
>         Thanks,
>
>         Brad
>
>
>         On Tue, Sep 8, 2015 at 4:48 PM, Alan Myers <amfoto1 at aol.com
> <mailto:amfoto1 at aol.com> > wrote:
>
>
>
>
>
>                         ... Then at
>                         engine number CT14234E through end of TR4
> production the
>                         cars had air
>                         filters with vent openings coming from a flame
> trap from the valve
>                         cover
>                         along with a "sealed" valve cover cap and no road
> draft tube.  TR4As had
>                         a
>                         gulp valve with a vented (1/8" metered opening in
> the cap) valve cover
>                         cap
>                         and no road draft tube.  This information was
> found in Service
>                         Bulletin
>
>
>
>                 I can tell you for certain that's incorrect. The change
> from open breathing to flame-trap, etc. came later than that.
>
>                 CT17791E (fitted to CT17602L, built in late October, 1962)
> originally had the vented cap and the road draft tube.
>
>                 The cap is the push on type, has big vents on the
> underside and filled with coarse  "steel wool" to reduce oil spray, I'm
> sure.
>
>                 The road draft (or draught, I suppose) tube is large
> diameter, press fit into the side of the block and locked in place with two
> screws (maybe 1/4 or 5/16").
>
>                 The original valve cover has no vent, but it does have a
> large brass plug where one could be fitted.
>
>                 Never had a problem with oil out of the push on cap or an
> unusual amount of leaks.... but the road draft tube kept most of the
> underside of the car rust free!
>
>                 The car now has an aftermarket cast alu valve cover with a
> breather pipe and a low profile, twist-in filler cap (with a single, tiny
> breather hole).
>
>                 I've replaced the road draft tube, but didn't plug it. It
> now has a nipple for a 1/2" or larger hose fitting. I don't think it's a
> good idea to completely seal up the bottom end of the engine. It needs to
> be able to breathe, same as the top end.
>
>                 Car is not yet back on the road, but when it is the plan
> is  to have a catch tank or can fitted with a breather cap, with hoses
> running from both the valve cover and the fitting at the draft tube.
>
>                 I intend to use a catch can similar to this:
> http://www.summitracing.com/parts/jrc-555-6402
>
>
>
>                 Alan Myers
>                 San Jose Calif.
>                 '62 TR4 CT17602L
>                 amfoto1 at aol.com <mailto:amfoto1 at aol.com>
>                 http://www.triumphowners.com/to-car/tr4-14/
>
>
>
>
>         <http://autox.team.net/mailman/options/triumphs/dave1massey@cs.com
> >
>
>
>
>
>
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