<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body><div><div style="font-family: Calibri,sans-serif; font-size: 11pt;">The Type 1 engine works fine in a Type 2, but has to have different tinware and a foam seal to make sure the cooling air can't mix with the spent (warm) air. I assume the bigger engines work just the same. In 1972 the cooling air intakes were enlarged, replacing the pretty crescent-shaped ones. They do act as scoops I don't think there's any internal trunking in Bay window Type 2s. I don't know about the Type 25, but they moved to the water-cooled heads on an enlarged capacity Type 1 quite soon in that model.<br><br>Dave<br>UK VW Type 3 and 4 Club.<br><br><br><br><br><br><br><br><br></div></div><div dir="ltr"><hr><span style="font-family: Calibri,sans-serif; font-size: 11pt; font-weight: bold;">From: </span><span style="font-family: Calibri,sans-serif; font-size: 11pt;"><a href="mailto:jadney@vwtype3.org">Jim Adney</a></span><br><span style="font-family: Calibri,sans-serif; font-size: 11pt; font-weight: bold;">Sent: </span><span style="font-family: Calibri,sans-serif; font-size: 11pt;">14/08/2019 16:17</span><br><span style="font-family: Calibri,sans-serif; font-size: 11pt; font-weight: bold;">To: </span><span style="font-family: Calibri,sans-serif; font-size: 11pt;"><a href="mailto:type3@vwtype3.org">type3@vwtype3.org</a></span><br><span style="font-family: Calibri,sans-serif; font-size: 11pt; font-weight: bold;">Subject: </span><span style="font-family: Calibri,sans-serif; font-size: 11pt;">Re: [T3] Diagnosis help for a badly running 1971 VW 411</span><br><br></div>On 13 Aug 2019 at 21:18, Dave Hall wrote:<br><br>> The Type 3 dual carb engine overproduction has definitely been confirmed<br>> as being used mainly in the Type 2. It was also used as an industrial<br>> engine. <br><br>I can definitely see this as an industrial engine, but I have trouble seeing <br>how to fit one in a bus. I'm giving away my ignorance about buses, but it <br>seems like getting the cooling air to the engine would require a complete <br>redesign of the rear of the bus. Maybe VW did this redesign for '72, when we <br>know they managed to stuff the Type 4 engine in there.<br><br>Which brings up the question: What did VW have to do to the bus body to <br>get cooling air into the Type 4 engine? Did they have to lengthen the body or <br>just shorten that shelf behind the engine? Did they make airducts in the body <br>or just seal the engine, top from bottom, and let the engine suck from the air <br>above?<br><br>Whatever they did, this would have been a different engine than what was <br>produced for Type 3s. I'd expect it to get a different engine prefix. Same for <br>industrial engines.<br><br>I guess I don't know how they did this for Type 1 industrial engines.<br><br>BTW, when my daughter was young, she figure skated, and one day when <br>we were at the local ice rink, I managed to talk to the Zamboni driver after he <br>refinished the ice. Turns out that this was an OLD Zamboni, and the engine <br>in it was a VW Type 1 engine. The Zamboni at the rink on the other side of <br>town was newer and had a Rabbit engine. Small World. ;-)<br><br>-- <br>*******************************<br>Jim Adney, jadney@vwtype3.org<br>Madison, Wisconsin, USA<br>*******************************<br><br>_______________________________________________<br>VWType3.Org mailing list - type3@vwtype3.org<br>To unsubscribe or change subscription options, visit:<br>http://lists.vwtype3.org/listinfo.cgi/type3-vwtype3.org<br>If you need more help, contact: gregm@vwtype3.org<br></body></html>