40hp Bastard Engine Cooling Fan

[DANP85]

Hey all, i've looked and can't seem to find the answer.
What cooling fan did the 40hp bastard engine use?
Was it a 36hp fan or later to be 40hp fan?
Thanks in advance!

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36hp shroud and fan

[EVfun]

Someone else had a question about a 40 horse fan and it made me curious, so I looked it up in Progressive Refinements. Seeing there was about 3 months of 40 horse engines with the lower blade count fan used on the 36 horse engines it seems likely it would have been used on the bastard engine too. I didn't see any other fan changes in those pages.

6 Aug 1959 VIN 2,528,890 - Fan bore increased to 28mm, formerly 20mm

1 Aug 1960 VIN 3,192,507 - 34 bhp engine introduced, formerly 30 bhp

8 Nov 1960 VIN 3,432,861 - Now 28 blades 20mm bore, formerly 16 blades 28mm bore

I'm not sure what the 20mm bore and 28mm bore are referring too, the change was made at the same time the generator went from 160 watts to 180 watts.
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[wagen19]

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The bastard 36hp would of used the same 16 blade fan as the former 36hp type1/2 engines.. vw at that time was using what they had on hand all left over parts .. later started changing parts do to bastard problems to show "look" we changed things. most of the changed parts didn't need to be done but vw wanted to show we fixed the problem....I know this is about the fan ...but vw said they had found the problem with the bastard and was the thrust bearing being in the center not on the fly wheel side #1 but yet now days vw guys use those flanged crankshaft which use the center for thrust bearings hmmm maybe not a problem after all hmmm... only real problem I seen/ see with the bastard engine was the low comparison 6 to 6 and the cast crankshaft ....which later 40hp they fixed those by raising the comparison and used forged cranks just like they were doing with the ex early 36hp ...with the bastard engine vw went the cheap way and said new engine let's save money and use cast crankshaft forged crankshaft are more expensive in which lead to the bastard 36hp having problems broken cranks and had recalls in which vw was forced to fix the problems in which they just said what the heck to look better let's just change the parts and upgrade them 34/40 hp ....there are a couple of reasons why folks called them " bastard " 1 was it was because of the underpowered engine and broken cranks folks were calling them f#%king bastard engine because of the problem/ recall....#2 another was because it was basically built like a 36hp same specs but looked like a 40hp so it was a mix / mut and given the name "bastard " vw never called it or named it bastard engine that was given by the vw community and has stood that way .....

[EVfun]

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There were 3 known bastards 1st gen 2nd gen 3rd gen bastard vw was messing around changing parts like heads , case webbing ..rocker arms mounting ,during the few months 3 400 001 -3 909 830 cases ... but after folks bought these new engines and problems started happening " broken cranks" recalls so vw was looking bad so on the new known as the 40hp engines which should of started at 4 000 numbers vw jumped to 5 000 numbers to stay far away from the bastard numbers all bastard engines were to be destroyed....so vw started changing everything on the 40hp heads cranks , case webbing, cooling tin design ,carb, rods but like I said most of that stuff didn't need to happen.. but vw was showing look there not the same we changed alot of things .... so the January to Jun would be the 3rd gen bastard if the case # starts with a 3 not 5

[wagen19]

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Only difference in all 3 gen bastard engines were mostly the head designs .... 1st gen bastard head vw added a built-in breather to the head these heads would have two studs with a metal plate just above the valve cover and used unique rocker arm cast mounts ...not long vw realize it didn't work well so that's what came next the new 2nd gen bastard everything on the engine was the same as the first gen just the heads were different these were casted the same as the first gen but vw didn't drill the breather hole and didn't add the studs and plate do to the fact it wasn't needed so they saved time and money not adding those details..on the 3rd gen bastard that's where vw started changing alot of things the heads looked like the second gen head but vw changed the rocker arm mount the rocker arm mount base were round just like the 40hp heads even though 40hp engines weren't out yet and basically the rocker arm mount vw used from the 3rd bastard to all 40hp / 1500cc now these rocker arms won't work with the 1st and 2nd gen heads the mounting is different vise versa 1st and 2nd gen rocker arm mounting blocks won't work with the 3rd gen heads ...rocker arms and shafts are all the same just the mounting blocks are different you can just switch the mounting bolt block for what ever head you want to use ...on the 3rd gen vw case also didn't have case webbing on areas like the 1st gen and 2nd gen bastard cases ...so its way easier to tell a 1st and 2nd gen bastard case to a 3rd bastard case just the webbing gives them away ...I believe the first and second bastards used the same fan as the 36hp and the 3rd gen used the 16blade fan but with the bigger holes do to the fact vw stated making changes by than untill they 100 % made changes after the problems with the bastard and came up with the 34/40hp engine that's when everything changed .... and started using the 28 blade fan on the 40hp engines ...porsche 356 used the 16blade fans but once vw went to the 28blade vw wasn't making the 16blade so porsche started using 28blade as well since vw supplied them with the fans ....if porsche 356 engines were using the 16blade fans and had no problems I don't see why the 16blade fan was a problem on the vw ....porsche 356 guys say that they made more power using the 16blade fan than the 28blade fan ....356 racers use to get the 16 blade fans and turn them in to an 8 blade fan for more power ....

[wagen19]