Cylinder head woes

[mikeonb4c]

I assume the term porous means allows water through or cracked

Agreed - it's just a bad use of a word.

Certainly is - most misleading

[haydn callow]

One of my job in "another" life was casting Gold & Silver using the lost wax process. Porous castings were always a risk and not uncommom....A porous casting was one where lots of small air bubbles were included in the casting resulting in the porosity.
Porosity = Permeable

[chriselmitt]

Hi Guys,

Thanks all for the support and apologies about the loose use of language...it's the trouble with giving a medieval historian the keyas to a car
The porous block as explained to me was that gas was escaping from the cylinder out through the walls and into the water around the cylinder to keep it cool.

Does that make any more sense?

Trying to get in touch with Discount Turcks to see what they say.

Thanks

Chris

[haydn callow]

'fraid not...

[Stinch]

This all sound too familiar

We have had the same from a local mechnic not checking the block is true before fitting a new head.
We had to pay good money for worse than nothing
Luckiliy Bell Hill came to the rescue and fitted a replacement engine.

Its so good the site is here for the dark times

All the best

Neal

[loftustowncrier]

I posted about this previously - we've just had a new engine fitted due to a 'porous' engine block. Maybe the term isn't particularly helpful, but that's what the (very experienced) Bongo mechanic told me. The cylinder head and gasket were normal but there was pressurisation and a lot of coolant loss which was gradually getting worse all the time. It cost a lot of money to repair. Thankfully the dealer we bought from was extremely helpful and we now have a much better Bongo back on the road.

And anyway, check out the Honda Civic from about 2006 - there were a lot of complaints about a porous engine block which didn't become evident until 60000 miles or so. Honda replaced these engine blocks under warranty (some had to fight). It may well be a manufacturing defect, and even metal can wear over time given enough stress.