CARLTON - I had no idea that one could "cut and paste" from one Forum to another and only expected that "people who knew about these things" would bother to hunt the question but thank you for doing so.
VOLVOPAUL - Thanks for your reply but :
1) The exhaust manifold and outlet elbow are as one
with a water cooled jacket. The mixing takes place prior to the outlet so I can`t do a dry run as you suggest.
2)The up hill run is not 32". With the Waterlock inlet only 2" higher, the exhaust pipe drops 12" vertically and rises 14" with the remaining 6" taken up inthe U bend at the bottom. If the water in the pipe while the engine is running is 20% of the total pipe volume there will be about 6" of pipe length full on switch off i.e. only the sump (bottom of the U )will be full. I do have an anti-siphon device so in theory no more water should come in.
As I under stand it a Waterlock is no more than a sump to hold the water contained in the "up-hill" pipes prior to the engine being switched off, abeit that the Waterlock has a greater capacity than the equivalent length of pipe. So what is wrong with using the sump/`U`bend as a substitute for a Waterlock in that part of the exhast system ?
I ask the question only because I have found traces of corrosion on the top of the pistons. But did this occur before the "U" bend or antisiphon was fitted by a previous owner ?
3) There is no room to fit the Waterlock either at the side of or aft of the engine where it would be significantly below the outlet of the mixed exhaust.
Any thoughts or comments from anyone would be much appreciated. VITALBA.
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