Well, I don't think Jim is going to have camshaft/timing chaing
problems after milling a pushrod 2L head. :^)
--- Peter Long <Peter.Long@ecologic.ca> wrote:
> Jim,
>
> something to consider if you find your head is twisted/warped or
> otherwise not flat where it should be: have it straightened before
> even
> considering milling either side of it. I had this done to a head
> once,
> and ended up not needing to mill anything at all. As I recall, it
> was
> not expensive. Saves the dread retarded cam timing and floppy chain
> syndrome due to a thinner head!
>
> Also remember to check parallel between the top surface and bottom
> surface, if possible with the head torqued to a known perfectly flat
> surface...can make a difference between snapping your cam and not.
> You
> can guess how I know this!
>
> Pete Long
>
> > -----Original Message-----
> > From: Jim Cawrse [mailto:nqrithjim@hotmail.com]
> > Sent: Tuesday, April 09, 2002 9:37 AM
> > To: Datsun Roadsters
> > Subject: Strange Overheating Problem, List Results and thanks!
> >
> >
> > For all:
> > Thanks for the many (about 20) responses to my problem.
> > The majority suggested some sort of small head gasket leak,
> > which would put exhaust into the cooling system.
> >
> > This makes perfect sense, because my radiator did not get
> > hot even as the car was overheating. So, this means the
> > water pump was getting air-bound with exhaust.
> > Centrifigal water pumps dont pump air worth a darn, so this
> > would effectively stop the cooling system from working.
> >
> > It must be a small leak, no water in the oil, no steam out
> > the exhaust, and no detectable (hand over rad cap hole with
> > engine cold and running) fumes coming out.
> >
> > It just so happens that my big cam, and perhaps over
> > exhuberant 6500RPM shifts have pulled loose a
> > rocker stud in the head, so instead of attemping the
> > garage heli-coil I guess I will pull the head and get it
> > fixed right, and also have the head checked for warps
> > and cracks.
> >
> > A few list memebers reminded me to clean out the
> > cooling passages around the cylanders, especially
> > back aft around nr 4. (thanks)
> >
> > Since I'm going this far, might as well pull the engine
> > and tranny and do the clutch, PP, and TO bearing.
> >
> > Since the tranny is out, might as well get it rebuilt,
> > ensure 5th is welded, get the speedo gear fixed,
> > and fix the synchros.
> >
> > In the Navy we call this a "cascading casualty"......
> > ie the fixing of one thing leads to fixing many more
> >
> > In the world of garage maintained roadsters we call
> > this "fun"....
> >
> > I am just happy this coincides with my Navy retirement,
> > as I am on terminal leave and basicly unemployed, yet still
> > getting paid for a few months.
> >
> > Are there still any roadsters on the list in the Chesapeake
> > Virginia or close by area? I might need a hand with some
> > of this. I do have my trusty 13 year old son.
> >
> > Thanks a giant amount for all the help!
> >
> > For those with other ideas, (temp gage, pressure cap)
> > thanks also, I already covered those, just forgot to say so
> > in original post.
> >
> > Jim,
> > Chesapeake Va
> > 67 pushrod 2L 5spd
> > 72 510 sportwagonGet more from the Web. FREE MSN Explorer download
> :
> > http://explorer.msn.com
> >
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=====
Thanks,
Adam Bradley
'70 Datsun 1600 Roadster SPL311-28181
'66 Datsun PL411 sedan PL411-022447
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