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Cracked Cyl Head
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Topic: Cracked Cyl Head (Read 1404 times)
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Kevin MacBride
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Cracked Cyl Head
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on:
28 October, 2013, 09:11:34 PM »
Just a query. A friend was on to me today, he has an Aprilia with what he suspects is a cracked head. Would anyone know of someone familiar with this type of problem. Is it something that would be an issue with Aprilias.
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B20 4th series (having a 'facelift')
2000 sedan
Fiat Multipla
Fiat Cinquecento
simonandjuliet
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Re: Cracked Cyl Head
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Reply #1 on:
29 October, 2013, 06:29:14 PM »
I am not aware of it being a particular problem - the usual problem is the central bolt which rots at the base and leaves little or no surface to clamp down on. If it really is a cracked head , there are spares available
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S1 Aprilia Cabrio, S2 Aprilia, S1 Promiscuo,S2 camioncino, S2 furgoncino, S3 Appia, R4 Sinpar, R4 Rodeo, R60 Tractor, Moto Guzzi Ercole, Disco 3, Mini ALL4 JCW, Moto Guzzi Cardellino 73,Fulvia Berlina GT, Fulvia Rallye S, Fulvia 1600 HF,
ben
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Re: Cracked Cyl Head
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Reply #2 on:
30 October, 2013, 06:34:53 AM »
As Simon say's Aprilia cyl. heads are not normally prone to cracking.
If Symptoms like water contamination in the oil or water leakage from the head-gasket area occur it is almost certainly due to internal corrosion of the alloy block.
If the land around the centre stud has been eaten away due to such corrosion Ken Couzens has a special annular milling cutter that can be used to create a flat land below the original head surface so that an alloy spacer can be fitted to enable the centre stud to be tightened in the normal way without straining the head. Using this cutter means that the head studs do not need to be disturbed. They are very difficult if not impossible to remove without shearing off as they go very deeply into the alloy block.
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Kevin MacBride
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Re: Cracked Cyl Head
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Reply #3 on:
31 October, 2013, 12:43:33 AM »
Thanks for the replies, I'll pass on the information.
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B20 4th series (having a 'facelift')
2000 sedan
Fiat Multipla
Fiat Cinquecento
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