| [ Total Views: 906 | Total Replies: 10 | Thread Id: 91375 ] |
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 MWH78
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| posted on July 3rd, 2011 at 09:28 PM |
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Help with heads
We have a completly stock 1600 twin port in the beetle we are doing up that needs a head replaced due to a broken exhaust stud fix that kind went
wrong. I have found a pair that seemed ok but when I enquired about if they had been machined for unleaded I got the following reply:
"These are auto linea brand -casing stamped GOI 010 013 7513 these are fairly new used heads -they are not machined-you would have to use de
compression shims"
I have no idea what de compression shims are. Could these heads be bolted straight onto our standard motor and work successfully or are they not
suitable? Thanks for any help you can give us.
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Brian
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| posted on July 3rd, 2011 at 09:36 PM |
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just bolt em on , no shims needed
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Brian
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| posted on July 3rd, 2011 at 09:37 PM |
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you don't machine standard heads for a std motor
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MWH78
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| posted on July 3rd, 2011 at 09:45 PM |
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Thanks for you super quick reply.
As they are "fairly new heads" to quote the seller would they be fine to use as is with unleaded or would they need hardened seats like other pre
unleaded cars?
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donn
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| posted on July 3rd, 2011 at 09:54 PM |
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Air cooled VW don't need anything special for unleaded, they are fine as they are. 
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waveman1500
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| posted on July 3rd, 2011 at 09:58 PM |
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All stock VW heads are okay for unleaded fuel. VW used hardened valve seats from the factory. If for some reason someone had put soft valve seats in
there, then it may cause the seats to wear a bit quicker, but this is not likely. If you discover that the seats wear too quickly then you can always
have them replaced later on.
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Brian
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| posted on July 3rd, 2011 at 09:59 PM |
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they already have hardened valve seats etc
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MWH78
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| posted on July 3rd, 2011 at 10:03 PM |
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Great thanks for all the info guys.
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 helbus
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| posted on July 3rd, 2011 at 10:07 PM |
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VW's have aluminium heads, so hard valve seats are already inserted. 91 octane unleaded is fine in a stock motor, we have used it for 6 years with no
problems at all. No decompression required.
It won't hurt to use a valve saver fluid in your fuel, nor will it hurt to use 95 octane unleaded. They just cost more. Valvemaster brand is a common
simple product to use. Don't use it in any vehicles with catalytic converters though.
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 Bizarre
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| posted on July 4th, 2011 at 07:53 AM |
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I would still cc the heads to work out what CR it is going to be before just bolting them on
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matberry
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| posted on July 4th, 2011 at 08:56 AM |
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| Quote: | Originally
posted by Bizarre
I would still cc the heads to work out what CR it is going to be before just bolting them on
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x2. Definately a requirment, and also deck height as the old heads may have had a step with zero deck. You have to check these things as it can't be
taken for granted.
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