<VV> Engine identification.
hugo at aruncoaches.co.uk
Sun May 12 23:03:00 EDT 2019
Ok, my 'older' engine is TO327YN, and my 'newer' one is TO712RD. I
presume the head numbers are towards the front of the car, as I can't
see the numbers from the back of the car? What I can see, however, is
all the pushrod tubes on both sides of one engine; there are little
square panels that are present on one engine blanking off this view, but
these plates are absent from the other engine. I presume they should be
Both my fans are non-magnetic, so I guess they're magnesium?
On 2019-05-12 22:00, FrankDuVal via VirtualVairs wrote:
> Well, you have one small bearing top cover and one larger bearing top
> cover. That you know for sure! The small bearing has an OD of 30 mm,
> and the larger one is either 35 or 36 mm, I forgot.
> Now, the 1960 140 cu in, the 61 to 63 145 cu in AND the 1964 164
> cubic inch engines cam with small fan bearings. Large fan bearings
> began in the 1965 year, NOT when the change to 164 cubic inch
> happened. So, 1964 has the small bearing and the magnesium fan (one
> year only item), and is 164 cu in.
> Of course, I have seen top covers changed, as Smitty points out
> below, so that is why you only know you have small and large
> I agree, buy a Junkyard Primer, it is usually right.
> Frank DuVal
> Smitty has an iPad?
> Handy device, I put shop manuals and the Junkyard Primer on my iPad
> and phone. Very handy when I'm somewhere and get asked a question of
> what fits what.
> On 5/12/2019 7:51 PM, Hugo Miller via VirtualVairs wrote:
>> Ok, we're getting somewhere; I have one engine (the slower one) with
>> a pulley and a 0.64" (approx) fan shaft; the other (the engine I'm
>> thinking of putting in that car) has a harmonic balancer and a 0.74"
>> (approx) fan shaft. I'll grovel & get some numbers presently, but I'm
>> guessing that points to my having one 145" and one 164" engine? Both
>> cars have alternators.
>> On 2019-05-12 15:18, Hubert Smith wrote:
>>> Gosh Hugo, you don't want much do you? There are dozens of ways to
>>> identify engines but because of the likelihood that parts and
>>> pieces (
>>> including complete engines ) have been changed over the years, you
>>> almost have to verify every detail. First of all the most obvious
>>> also the most likely to have been changed.
>>> The fan bearing shaft. All Corvairs up to and including 64 had a
>>> smaller shaft. Upper block covers with good bearing from Lates
>>> often stuck on there rather than change the bearing when bad.
>>> Harmonic damper rather than rear pulley indicates 164 cu engine.
>>> Also easily changed.
>>> Delcotron adapter ( the casting that holds the filter ) was changed
>>> in 65 for the alternator. Sometimes a surface clue that it might
>>> be a
>>> 65/69 engine
>>> Getting more in depth, the head casting numbers on the ends of the
>>> heads are pretty reliable indicators of the year and cu in size of
>>> Lots of other things to look for inside the engine. Short answer
>>> all this is buy a junkyard primer from Clarks which offers the ID
>>> numbers for tyrannys and diffs.
>>> Sent from my iPad
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