[TR] TR4 road draft tube plug

Geo Hahn ahwahneetr at gmail.com
Sun Sep 6 10:24:30 MDT 2015

Brad -

Just curious - what is your objective in trying this?

It may spare the environment some oil fumes as you drive and may or may not
decrease the oil drip on your garage floor (may even increase it depending
on engine condition).


On Sun, Sep 6, 2015 at 4:56 AM, Brad Kahler <bkahler1 at gmail.com> wrote:

> Geo, I'm wondering if your definition of "easier" is the same as mine! :)
> It's my understanding that the early TR4s were identical to the TR3, i.e.
> push-on valve cover breather and road draft tube.  The mid to late TR4s had
> the air filters with the tube in the center with a flame trap coming from
> the valve cover, no road draft tube and and the valve cover cap was a
> sealed type.
> The TR4As had a vented cap, gulp valve and no road draft tube.
> I'm going to do some testing by installing the vented valve cover cap,
> installing the gulp valve and I've temporary capped the end of the road
> draft tube.  It will be a few days before I can test this setup as I'm
> still waiting for the replacement gulp valve diaphragm to arrive.
> Brad
> On Sun, Sep 6, 2015 at 12:30 AM, Geo Hahn <ahwahneetr at gmail.com> wrote:
>> I have done the opposite, removing the plug and installing a road draft
>> tube on my late TR4.
>> If anything what you have in mind should be even easier, but...
>> I installed the tube because the small opening on the TR4 valve cover
>> could simply not relieve enough crankcase pressure - oil was oozing from
>> every pore.   Perhaps the TR4A system is more effective though.
>> Geo
>> On Sat, Sep 5, 2015 at 4:32 PM, Brad Kahler <bkahler1 at gmail.com> wrote:
>>> I'm contemplating removing the road draft tube on my TR4 and am
>>> wondering if anyone has successfully removed the tube and installed the
>>> plug with the engine still in the car.
>>> It kinda looks like it would be a job for a contortionist!
>>> Thanks!
>>> Brad
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