VW Engine Building: Heads, Valves, Springs, Keepers, Type 1, 1500-1600cc
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- เผยแพร่เมื่อ 16 ม.ค. 2015
- Aircooled Volkswagen Type 1 engine building video: Cylinder head evaluation and installation. VW engine guru Mike Smith covers possible issues with both new and used VW heads, including showing us some examples of cracks in used VW heads. Valve keeper installation and issues are illustrated. He shows how to lap valves, and how a lapped VW valve compares to a new unlapped valve. Assembly of the valves, springs, and keepers is covered here.
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These videos stand the test of time. I love the lack of cheesy heavy metal transitions. I feel like I'm in Auto shop in 1992 again!
You explain the whole process with clarity and enthusiasm. by far, the best VW Tech on the TH-cam. Thanks.
thx, appreciate the feedback!
I've been hitting valve springs with brass hammer like you for many years. One bad experience not checking valve seat costed me over 10k in damages to my 505ci Chevelle motor. Excellent tip and everyone should do this. Forget rubber hammer, just use brass. Thanks for the uploading this vid.
thx for the feedback, it's helpful for people!
starting a 1641 build next week. picked up the case today. this will walk me through the whole thing. great video!
Thanks for watching, good luck with the build!
Excellent, just what I was looking for. Thank you.
vza423 Thanks for the feedback, appreciate it!
thank you veru much. you do a great job
+cristina lopez thx for checking out the vw engine building videos!
really helpful thanks
Glad it helped, thx for watching
Dear DragRacing what kind of solvent did you use to clean so perfectly the heads?
+cristina lopez If the valves are sealing against the head, you can turn the head upside down and soak it in a liquid solvent, but these heads were probably walnut-blasted at the machine shop.
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I had #4 exhaust valve stem grooves stripped off by the keepers and was told that the keepers are not supposed to touch when the spring is installed so I made sure there was clearance by grinding the side of the keepers flat ends. Now you say the keepers have to touch and allow the valve to move rotational. I understand the rotation part.......that keeps the valve seated good, but now Im confused as to which is right. I have no idea why the exhaust valve grooves were stripped off the valve, and just figured it was because the keepers didn't have enough clamping pressure on the valve stem.
Zundfolge1432 I wonder if there was some valve float going on there?
Per Gene Berg, The keepers aren't supposed to touch in a high performance engine build, but for stock builds, the keepers should touch.
Some people believe that multiple grooves in the valve stem means that the keepers should touch, to allow rotation, while single groove stems should not have keepers that touch: books.google.com/books?id=VX4kZGzIGz8C&pg=PA261&lpg=PA261&dq=valve+stem+keepers+touching+rotation&skeepers%20touching%20rotation#v=onepage&q=valve%20stem%20keepers%20touching%20rotation&f=false
All I know is that all the grooves were stripped off and the valve was pounding back and forth in the keepers. 1600dp bus motor.
Zundfolge1432 Motors run hot and get pushed hard in a bus, that could have been a factor. I owned a couple of Type 1 bubbletop VW buses, overreving 'em just seems to come with the territory. What I did was run a spring that was stronger than stock, just to keep the valve float down as much as possible. Kinda weird that keeper problem only showed up on #4, I wonder if there was a weak spring, or a defective part.
DragRacingTV quite possible. since wife thought it was a good idea to not bother shifting into 4th gear on the freeway
So VW flat 4’s have no valve guide seals since the valves sit horizontally? Oil can run down the valve stem I suppose?
Can’t run down
Horizontal valves and also they aren't usually submerged in oil. In practice the plugs should be burning clean, with little oil residue. There are much bigger problems with oil consumption in the form of leaks, in the rear main seal area for instance.
How big is that spring compressor? Any links for one?
For stock VW springs, just about any spring compressor will work, if it's a performance spring setup, bolt the typical VW spring compressor to the table, and get leverage on it with a long bar that's held under your armpit.
is there a way/procedure/method to get the keeper clearance to touch, Im sure too much or loose on the stem is not good either I would guess
Zundfolge1432 Brand new factory VW keepers should touch each other with the right amount of clearance, but I'm not sure how you'd check the clearance, that's a good question.
so I should probably go get new keepers, doubt vw sells them anymore. Probably aftermarket.
Why shouldn't you knurl vw valve guides? I know its not a proper fix but why shouldn't you do it at all?
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