| [ Total Views: 475 | Total Replies: 4 | Thread Id: 76280 ] |
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 Mountains Greg
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| posted on May 1st, 2009 at 05:51 PM |
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Valve problem
Ok my bug has been running like a chaff cutter  I just bought another
manifold because the heatrisers in my other one were clogged and the carb was icing up on cool days...
Thought I had solved the problem until I checked the valve clearances... No.1 Cylinder valves (the one closest to the front of the car) inlet or
outlet not sure but, when I loosened off the lock nut and adjustment screw I could'nt get any clearance or gap between the tappet and valve.
What does this mean? I'm sure it's not going to be good but, is it easy to fix or a headache? Is it going to cost me alot of $$$$
Thanks guys
If it's not in a Vee Dub I'm not going!
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68AutoBug
A.k.a.: Lee Noonan
Aircooled Master
Beetle Restorer - Experience over 138% - YIKES --
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| posted on May 1st, 2009 at 06:02 PM |
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Normally., in the 50s and 60s
this meant You had a stretched valve....
and the head was going to break off... [the valve]
or at least thats what would happen....
try another screw and nut to see if it IS a BIG Problem..
back in the 50s and 60s it was usually number 3 cylinder
that dropped the valve due to the oil cooler being over Number 3 cylinder....
LEE
- [size=4]Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY--- [/size]
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Mountains Greg
Slammed & Awesome Dubber
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| posted on May 1st, 2009 at 06:17 PM |
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Hi Lee,
I removed the adjustment screw and all appeared to be ok and I even removed the actual set of rockers from the head and all appears ok with that as
well... Just the valve appears to be the problem. If it has dropped the valve is this a huge job to fix?
Cheers
Greg
If it's not in a Vee Dub I'm not going!
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68AutoBug
A.k.a.: Lee Noonan
Aircooled Master
Beetle Restorer - Experience over 138% - YIKES --
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Location: SCONE in UPPER HUNTER VALLEY NSW
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 posted on May 1st, 2009 at 07:45 PM |
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Once its dropped a valve it will damage the piston/head and probably the cylinder....
but all these can be gotten 2nd hand or new etc...
its usually the exhaust valve that goes...
the outside ones are exhaust valves...
inner ones are inlet...
You will need to take the engine out to undo the head on that side... undo the exhaust and inlet manifold..
take the head off - maybe throw it away and replace with another good one... the piston will also be damaged..
sometimed the cylinder is also damaged...
BUT
Maybe your Valve has been open all the time....
due to being stretched... and riding on the tappet all the time... which will make a VW engine misfire etc...
So, Your engine maybe OK, at the moment...
the valve stem has stretched which is a telltale sign...
when the head of the valve will come off is anyone's guess...
If the valve head has seperated and is sitting in the head, it would be making a terrible noise.... I would think...
the valve being Open all the time, would make the engine run on 3 cylinders..
LEE
- [size=4]Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY--- [/size]
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grumble
Son of Jim - Creator of Good
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| posted on May 1st, 2009 at 08:49 PM |
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I would say valve seat recession due mostly to unleaded fuels wit no lube to the valves,the valve obviously sits higher with the rocker gear removed.
The easy fix is to replace the heads with a pair of new ones.
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