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1972-73-74 Type IV (4) Engine Tins
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hazetguy
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PostPosted: Thu Apr 26, 2018 6:54 pm    Post subject: Re: 1972-73-74 Type IV (4) Engine Tins Reply with quote

jtauxe wrote:

I have a couple of similar but not identical pieces of tin, and am keen to find out which goes to which year Type IV engines.

In the fiche above, there is a part called, maybe 21A. It's the grommet on the front edge (towards the front of the vehicle) of the right sled tin (21), or warm air channel. I have two sled tins for the right side. One has the hole with the grommet, and the other does not. Are there particular years that these go to?


The one with the grommet is for dual carb/manual fuel pump engines. Itís the hole for the pump weep hose.
I *think* the ones without the hole are for Ď79.

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busdaddy
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PostPosted: Thu Apr 26, 2018 6:56 pm    Post subject: Re: 1972-73-74 Type IV (4) Engine Tins Reply with quote

[quote="jtauxe"]
Tcash wrote:
... I have two sled tins for the right side. One has the hole with the grommet, and the other does not. Are there particular years that these go to?

The perforated ones are for carbed buses (fuel pump drain hose). So let's say 72-74 for the hole and maybe 79 for the no hole?, not sure which later heater boxes have the same shape, 75-78 use a radically different sled tin. And how about FI'd type 411/412 cars?, the heat exchangers look odd, but I've never paid much attention to the sled tins.
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Alan Brase
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PostPosted: Thu Apr 26, 2018 8:25 pm    Post subject: Re: 1972-73-74 Type IV (4) Engine Tins Reply with quote

[quote="busdaddy"]
jtauxe wrote:
Tcash wrote:
... I have two sled tins for the right side. One has the hole with the grommet, and the other does not. Are there particular years that these go to?

The perforated ones are for carbed buses (fuel pump drain hose). So let's say 72-74 for the hole and maybe 79 for the no hole?, not sure which later heater boxes have the same shape, 75-78 use a radically different sled tin. And how about FI'd type 411/412 cars?, the heat exchangers look odd, but I've never paid much attention to the sled tins.

Kinda think 411's are like 72-74 buses. Ray Greenwood would have the last word on that question, I think.
I agree with your answer about the weep hose hole.
Al
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Wildthings
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PostPosted: Fri Apr 27, 2018 12:49 am    Post subject: Re: 1972-73-74 Type IV (4) Engine Tins Reply with quote

I think, but am not sure, that the 411s and 412s had their own sled tins as the heater boxes where much smaller than bus heater boxes.
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jtauxe
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PostPosted: Fri Apr 27, 2018 7:13 am    Post subject: Re: 1972-73-74 Type IV (4) Engine Tins Reply with quote

Great information -- thanks, guys.

I have 3 '72-'74 buses, all of which are using their original fuel pumps, and all of which have the weep hose simply dangling. I didn't know it was supposed to "go" anywhere - ha!

So, the one without the hole must be a '79, but will work on the '73 if I just let the weep hose continue to dangle.
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