Ferrari Mailing List: Re: Removal of 308 carbureted airbox

[Robert Garven (rgarven]

Some pics, has anyone used tennis balls with a hole in them to cover the carbs?

On Nov 12, 2021, at 5:36 AM, George <ygpz4re [at] hotmail.com> wrote:

First off, yes, Doug is right - great engine photo Rob.  It's one I'll probably save - "just because".

Here's something no one seems to have mentioned, so I will (and I suspect Rob does this anyway, but just neglected to mention it) - once the top of the airbox is off, before doing anything other disassembly, stuff shop rags down the carb throats.

Embarrassing lesson for me - changing cam belts on my former ex-Steve Cook/ex-Joe Martz 308, one of the small washers on top of a cam cap fell into a hole in the head.  Panicking, I consulted my expert - the former race team manager at FoW.  He suggested spraying a whole can of brake cleaner down the whole, then drain the oil and drop the oil pan.  When that was done, right there on top of one of the horizontal baffles (part of the whole oil pan structure - which I still have in my garage, by the way, as it was changed out for a 328 style pan during the rebuild - a whole other story!) was - Ta Da!! - the washer just lying there waiting to be discovered.  But for a shop rag......

gp

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From: "Robert W. Garven Jr." <rgarven [at] gmail.com>


Having done this at least 50 times neither solution works. When I tried to glue them on this did not work for me, because the rubber gasket moves around a bit and there?s also a bit of slop in between the studs in the carburetor and the little top hat washers For them to move around a bit so that they can fit together with loose tolerances. And if you put them on the top of the rubber gaskets, that?s not how that the design works as there is a small indented groove into the bottom  of  carburetor trumpets where the thinner part of the top hat was designed to fit. The wider part of the design rides on the top of the carburetor and fits into a groove that?s molded into the bottom of the rubber gasket also. Of course you can do both of these modifications which I tried among others but neither one works satisfactory, fits well or how it was designed to work.

As you can imagine I?ve tried all these and and Peter and I have discussed this on numerous occasions over the years. What I found that works really good is to first remove the breather hose that attaches to the bottom of the airbox which allows it to rise up vertically, then as I lift it up (the air box) I take a long bamboo skewer and just kind of push down each top hat washer till it falls out of the rubber gasket and sits on the carburetor top  and then you can lift the airbox off straight up without losing any of the washers . To me what?s harder is removing the 16 washers and small nuts that go on top of the trumpets and hold them to the airbox. I have to use two specific tools to do that because it?s hard to get to. Ferrari actually left some cut outs in the trumpets to get a tool down in there but I?ve tried every combination of sockets and what I used is a small socket screwdriver to remove it after I use a short quarter inch socket extension and short socket to loosen it fi
 rst.

I have lots of pictures if you guys are that interested, but I doubt that you are.? i?m sure some people can knock this out in a few minutes but it takes me a couple hours to do it safely I said every moisture and not in a little lime to make sure that I have all 16 before I proceed.

Rob

Sent from my iPhone

> On Nov 10, 2021, at 8:43 AM, Hans E. Hansen <FList [at] hanshansen.org> wrote:
> 
> ?Or turn the spacers upside down so they come off with the air cleaner....
> 
> Hans.
> 
>> On 11/10/21, Douglas Anderson <dnt [at] dock.net> wrote:
>> Nice picture Rob ? but then you?ve always been a good photographer.
>> 
>> 
>> 
>> I see you have the rubber gasket under the air horns.  VERY tricky to remove
>> the air cleaner without losing one or more of the metal spacers . . .  down
>> the carb throat.  Thankfully the spacers are made of a magnetic material . .
>> . and COUNT all of them before starting the engine, eh?
>> 
>> 
>> 
>> My solution is to immobilize the little bastards in place.  So, with the air
>> cleaner removed, I placed the spacer on the air horn stud and put one drop
>> of Loctite 242 blue on them.  Easy enough to break the bond should I ever
>> need to get into the carb and they seem to stay in place when I remove air
>> cleaner.
>> 
>> 
>> 
>> Again ? nice picture.
>> 
>> 
>> 
>> Doug
>> 

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