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40 hp push rods
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128vw
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PostPosted: Wed Feb 14, 2018 3:32 pm    Post subject: 40 hp push rods Reply with quote

I am building a 40 hp engine from parts that I have around. I am using a set of long rocker stud heads and when I put on the rockers I have to back the adjuster screws almost all the way out to set the valves. Are there different length push rods or can I shim the rocker stands up, this looks good.
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Slow 1200
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PostPosted: Thu Feb 15, 2018 1:54 am    Post subject: Re: 40 hp push rods Reply with quote

there's like 3 different lengths of 40hp at least, so yeah, when you mix and match heads, lifters and rockers you'll probably have to improvise a little
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128vw
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PostPosted: Thu Feb 15, 2018 8:44 am    Post subject: Re: 40 hp push rods Reply with quote

So can I just shim the rocker stands to make the geometry close. Not a performance engine, just around town. Thanks
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PostPosted: Thu Feb 15, 2018 12:57 pm    Post subject: Re: 40 hp push rods Reply with quote

You can shim the rockers, but if you don't get the geometry correct and only "close" you're looking at accelerated wear on the valvetrain. Just a hunch, but it sounds like you might have 1300-1600 pushrods installed instead of 40hp ones. Have you measured their length?
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glutamodo Premium Member
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PostPosted: Thu Feb 15, 2018 2:21 pm    Post subject: Re: 40 hp push rods Reply with quote

Well, as far as what was sold in the USA there were two lengths. I guess there was another change to just very slightly longer ones during model year 1967 but that's nothing. The major change was here:

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128vw
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PostPosted: Fri Feb 16, 2018 5:53 am    Post subject: Re: 40 hp push rods Reply with quote

It looks like I have the early push rods like the top ones in the picture. I need to check the stands are marked top. Does anybody have the length of the 2 early push rods?
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hazetguy
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PostPosted: Fri Feb 16, 2018 8:34 am    Post subject: Re: 40 hp push rods Reply with quote

128vw wrote:
Does anybody have the length of the 2 early push rods?


https://www.thesamba.com/vw/forum/viewtopic.php?p=8616831#8616831
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creideahm
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PostPosted: Fri Feb 23, 2018 5:47 am    Post subject: Re: 40 hp push rods Reply with quote

I have NOS both sizes. Pm what you need.
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