[Bmcu] [VTR] TR3 compression test

[Ron Christensen]

Hi Jeremy,

A note on your starter problem . . .

The bendix has a gear with an internal worm drive-gear that causes the gear
to slide out against the retracting spring and engage the ring gear when the
starter motor spins. The drive may be jammed/stuck, WD-40 might free it up. 

Sometimes the teeth on the bendix or the ring gear get worn or broken and
the tapered relief on the engaging faces of the teeth has a flat spot and
the gear slides out and stops against the end of the ring gear instead of
sliding into mesh, and the motor will just spin. Bumping/rocking the car in
gear will rotate the ring gear to a new contact area.

Maybe this will help.

Ron


  

-----Original Message-----
From: bmcu-bounces at autox.team.net [mailto:bmcu-bounces at autox.team.net] On
Behalf Of Jeremiah Curry
Sent: Sunday, January 27, 2008 5:27 PM
To: vtr at autox.team.net; bmcu at autox.team.net
Subject: Re: [Bmcu] [VTR] TR3 compression test

Thanks to everyone who responded.

The consensus seems to be that I shouldn't worried till I have at least
tested with the starter.  On a side note, the starter worked last time I
tried (a few months ago) but now just spins without engaging.

Thanks again,
Jeremiah

-----Original Message-----
From: vtr-bounces+jercurry=comcast.net at autox.team.net
[mailto:vtr-bounces+jercurry=comcast.net at autox.team.net] On Behalf Of
Jeremiah Curry
Sent: Tuesday, January 22, 2008 11:35 PM
To: vtr at autox.team.net
Subject: [VTR] TR3 compression test


howdy all,

I just put the head back on my TR3 the other day and wanted to make sure I
did everything right, and that the parts were all good.  We did a leak down
test and 2 of the cylinders where "yellow" and two were "green".  To be
doubly sure, I borrowed a compression tester from autozone and did that
test.  My starter has decided not to cooperate since then, so I had to turn
the engine over with the hand-crank.  Due the manual nature, I only went
through about 2-3 compression cycles, but the PSI rating for the cylenders
were from 30-60 psi.  I understand I should be looking for 120 psi.  Is this
an indication that something is horribly wrong?

to test the tester, we put it on my brother's 5.2L jeep v8 and it got 85
psi, that seemed a little low too.  Any insight would be appreciated.

thanks,
Jeremiah
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