This previous reply explains why I asked if you had checked compressions . "delboy_11 " suggestion of lapping in valves is wrong and wont cure fault .The valve sticks in valve guide resulting in burnt valve / seat .
Volkswagen Polo low pressure cylinder 1?
The Problem
Car Volkswagen Polo 1.2 55psi 3cylinder
Year 2006
Owner mark coyle
Posted 29 03 2010
Ref#:
4535
The Problem
suspected stuck valve in cylinder 1. how can this be fixed without taking off cylinder head
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Solution 1
whittingehame
Legend
Since: Oct 2009
Posts: 415 | Fixes: 5418
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Suggested Solution
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Posted on 2010 03 29
More than likely if sticking , valve / seat will be burnt , meaning head off.
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Solution 2
seat tech
Driver
Since: May 2010
Posts: 0 | Fixes: 3
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Suggested Solution
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Posted on 2010 05 16
Hi this sounds the same problem as the Seat 12 3 cylinder and the only fix is a new cylinder head as these heads cant be reworked. The problem is burnt valve seats you will usually get the engine warning light on and when you have the fault memory read it says misfire on cylinder ?.
Posted Sep 13, 2011 (13 years ago)