#31
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Quote:
Quote:
48,48,48,49cc !! The 49cc reading is on the head where the valve hit the piston(#3). But this doesnt make sense to me. If it was machined 49cc, that means he took 'too little' off. And the piston doesnt come up that high compared to #4. So I dont get that, that should be the problem. Or am I missing something obvious? According to this site's calculator I calculated the compression ratios per cylinder as follows: #1 - 1.26mmDH 48cc = 8.9CR #2 - 1.5mmDH 48cc = 8.69CR #3 - 1.26mmDH 49cc = 8.76CR #4 - 1.22mmDH 48cc = 8.93CR They are all over the place! Quote:
I also want to ask... Under the rocker shaft, do I need some kind of washer/spacer? I have been told just to assemble it with the little rubber ring/washer underneath to prefer an oil leak
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Zeroaxe Last edited by zeroaxe; September 29th 2006 at 09:25. |
#32
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Update...
Ok, so I mocked up the #3&4 side with blu-tack and torqued the head properly. I put in the cam lifters with the pushrods and turned the motor a few times to see if the lift-n-fall smoothly on their own steam. #3 exhaust side lifted but didnt go down on it's own steam(with the weight of only the pushrod), so added some oil and 'aided' down a few times turning the engine. After that it would lift-n-fall fine. Next, put the rocker arm on, back the adjusters out all the way and bolt it down securely. Again I turned the motor a few times, and then commenced with valve adjustments. Turned the engine a few times and there were no obvious 'counter force'. No resistance at all.
Disassembled everything(while saying to the wife:"Stay here. Before you leave I want to show you something") and went ahead making a fool out of myself in front of her(oh, the humiliation. There goes the ego! ). No marks on the blu-tack at all!? Huh!? What the heck? The blu-tack was about 3mm thick on the piston head!? At first I thought that I didnt place it well on the piston, BUT, where the intake valve hit the #4 piston the blu-tack was on the mark!? Now I am at a loss. the only thing I can think of now is that I had a coil bind on that valve, causing the bend PR(but saying that, I should've felt it turning the motor over by hand). Or, it slipped out of the rocker's cup and on the way out the edge of the cup caught it and added +/-5mm of lift, pushing the valve too far? I understand it like this: The valve got hit when the piston came up for the compression stroke? How else can an intake valve be hit? Valve float? It should never be open when the piston is on it's way to TDC, no? I will do this same excersize AGAIN tomorrow, just to make sure I wasnt a moron. I will (hopefully have time to) do the rocker geometry measurements, if they check out, then I dont know what the reason would be for 2 bend pushrods? It cant be badly adjusted valves, because by nature(when it comes to these kind of things) I am paranoid and re-check measurements 3 or 4 times! More later.
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Zeroaxe |
#33
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If you have hydraulic lifters, then i wonder if turning the engine over by hand will lift the valve its full amount. The lifter has a ball check valve which shuts when under pressure and effectively turns it (almost) solid, but will this work when turning over by hand, so the valve doesn't lift fully as the lifter drains down?
Don't know if this is what is happening, but just an idea? Moog
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(o\ /o) '73 GT Beetle with 2.1 WBX (owned since 1990) (o\ /o) '74 Jeans Beetle (owned since 1986) (o\ /o) '67 Zenith Blue Beetle (needs lots of work..) '02 Passat Sport Diseasel Estate ("Das Boot") '05 Seat Leon FR, chipped (Mrs Moog's toy really...) |
#34
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Moog,
Checked SSP but didnt find a pic of the ones I have got, however, found them on another site: The site states: "This cam follower (also called lifter) is for 1972-77 Vans with 1700, 1800cc, 2000cc NON-Hydraulic engines." Does this help to clarify some things?
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Zeroaxe |
#35
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Externally 1.7(CA), 1.8(AP) & 2.0 (CJ) Solid lifters look the same as 2.0 (CU), 1.6 (CT) and WBX hydraulic lifters, and they can be swapped from case to case, but only used with the right cam.
Look at the end where the pushrod sits - do yours have a spring clip inside them with an internal piston? Remove the spring & the piston comes out to release a ball & spring. What length are your pushrods? 272mm (hydraulic) or 282mm (solid) Moog.
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(o\ /o) '73 GT Beetle with 2.1 WBX (owned since 1990) (o\ /o) '74 Jeans Beetle (owned since 1986) (o\ /o) '67 Zenith Blue Beetle (needs lots of work..) '02 Passat Sport Diseasel Estate ("Das Boot") '05 Seat Leon FR, chipped (Mrs Moog's toy really...) |
#36
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I had a look at the cam followers and there is no sign is any clips/springs/internal pistons. I also put some oil in the 'cup' and it syphoned through the hole out the two holes on the oposite sides. I think we can safely say that these are solid lifters?
As to the PRs, I measured 4, and all of them measured 281mm ( ). I can only assume that these are rods that started their life as 282's and wore off a bit? Hope this helps.
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Zeroaxe |
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