Hello, Cylinder head corrosion: Dom raises an interesting point when he states that Vintage VW in Sydney came to the conclusion that the corrosion is due to hot spots in the cylinder heads. I found it interesting, because that is exactly what Russ Meeks of "RM Engineering" explained to me. The solution: Have the cylinder heads ceramic coated. It reduces the amount of heat transferred to the coolant (and also protects the mating surface of the rubber gasket). Russ runs a relatively small shop, and he really knows what he's talking about. He has a long-time reputation in Portland, Oregon. I drove all the way to Portland to meet him in person, before I would leave my new set of cylinder heads with him. I did get them back ceramic coated according to the agreement, and price agreed. It did take a couple of weeks longer that he thought, but it wasn't a problem for me. If anyone is interested, here is his address: Russ Meeks, RM Engineering, Finish Line Coatings Ceramic Thermal Barrier Coatings 2889 S.E. Silver Springs Road Milwaukie, Oregon 97222 (503) 659-4278 He's done a lot of vw heads, air and water-cooled. Harald '90 westy Dom wrote: > In relation to the head leaks, Vintage VW in Sydney Australia have come up > with a theory and a product to eliminate/greatly reduce? the chance of this > happening again. > > Their theory, and they know enough about VW's to provide reasonable > assurance that it's well informed if not proven, is that the problem occurs > due to an engine hotspot as the coolant passes through the head. At a point > during this passage the coolant reaches boiling point or close too but cools > down again as it circulates throughout the system. Thus the need to replace > coolant not too irregularly as this hotspot somehow transform's the > composition of the coolant into something more corrosive. > > Dom :) > > ----- Original Message ----- > On Wed, 8 Sep 1999, [iso-8859-1] Björn Ratjen wrote: > > > > > 1. What should be done as corrosion prevention? > > (grounding straps?, insertion of kathode? special gasket sealer?) > > > > > > Björn |
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