<VV> Axle shafts, wheel wobble & detonation.

Mon Mar 2 22:19:02 EST 2020

I have all the relevant manuals - I simply hadn't noticed the 
deflectors tucked behind the pushrod tubes - all I saw was fins when 
frankly I was expecting to see the remains of a forest in there.
If I had know the hurricane was going to blow a ton of leaves into the 
engine compartment I would have done just that & covered it over. I 
wasn't expecting it, as it has never happened to any of my other cars. 
Couldn't believe my eyes when I opened the engine lid & couldn't see the 
engine for leaves! I think we're safe for another few months till the 
next hurricane season.

On 2020-03-02 22:06, Charles Sadek wrote:
> You MUST get a manual or look online so you know what you are dealing
> with. The cylinder air baffles or deflectors are underneath the
> cylinders and MUST be there to limit air flow where it isn't needed 
> so
> that most of the air goes thru the heads and the rest thru the upper
> cylinder fins. Air-cooled Porsches have air deflectors too.  If you
> have leaves like that, you need to cover the engine when you are not
> around with a piece of cloth or plastic or something to keep debris
> out from fan and below, across cylinders and heads. One can run a
> stock Corvair engine in Las Vegas, NV as my Dad did and across the
> desert without problems if the air cooling system is working.
> Chuck S
>
> -----Original Message-----
> From: VirtualVairs [mailto:virtualvairs-bounces at corvair.org] On
> Behalf Of Hugo Miller via VirtualVairs
> Sent: Monday, March 2, 2020 8:56 PM
> To: virtualvairs at corvair.org
> Subject: Re: <VV> Axle shafts, wheel wobble & detonation.
>
> It's a 64 convertible. I said that. And it's in Florida. I said that
> too! I am from the UK and sort of commute between here & there, and I 
> do
> have a Corvan in the UK, but that's another story.
> Yes it detonates when it gets hot. But it also detonates before it 
> has
> even warmed up. That is the bit I find puzzling. I haven't even taken
> the plugs out yet, as I have more pressing things right now - such as
> the fact that the idle jet on the left carburettor is blocked so it
> won't idle.
> I thought the baffles were above the cylinders? Although I've never
> looked in there before. I have a couple of these cars & I've just 
> been
> running them while I decide what to do. Now I'm getting stuck in.
> Funnily enough, my other '64 convertible has also started 
> overheating,
> which it never used to do before. I haven't looked at it yet though.
> When the wind blows here in Florida, the entire top of the engine can
> get buried in leaves to a depth of six inches, so I wouldn't be
> surprised if some have taken up residence in the fins. I'm just
> surprised that I didn't find any (yet) on the one I looked at.
>
> On 2020-03-02 20:03, Matt via VirtualVairs wrote:
>> Hugo!!  You need to remind us of What vehicle you have…  you are not
>> the only on in the UK.
>>
>> The Detonation?  Engine is overheating!  And when you say the FINS
>> looked clear from BELOW….. tells me your cylinder baffles are
>> missing!
>>  They FORCE  more air over the heads…   Then you mention leaves….
>> Time to remove the Fan’s Shroud….  Clean / blowout the oil cooler
>> fins….  Shine a light  from below  and see if passages are clear…  
>> if
>> not make them clear.  See pic!
>> …top is “de-flashed” [ clear
>>
>> Matt Nall
>> Sea Mountain
>> SW  Oregon Coast
>>
>> Sent from Mail for Windows 10
>>
>> From: Hugo Miller via VirtualVairs
>> Sent: Monday, March 2, 2020 4:43 PM
>>
>> The main problem
>> is it overheats after about ten or fifteen miles - even on a cool
>> Florida day - & I have to wait for it to cool down before I can go
>> any
>> further. I took the bottom shields off, expecting to find the fins
>> all
>> clogged with leaves where the storms had blown them in, but they all
>> look clear enough. I was thinking of putting a hose pipe down there
>> through the fan & see if anything comes out. Or would an air line be
>> better?
>> And it detonates like crazy - not pinging, but a heavy knock. At
>> first
>> I thought it was piston slap, but it doesn't do it from cold. It 
>> does
>> start doing it before the engine gets the slightest bit hot though -
>> before it has even reached running temp I would say. I haven't
>> checked
>> things like ignition timing yet. I'm not quite sure which job to
>> tackle
>> next, so I thought I'd throw this lot out there to see if anybody 
>> has
>> any suggestions?
>>
>>
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