Any hints for tips, compression check on ford 330 sabres

Divemaster1 said:
Reading this again .... think what LS and BB are referring to is your hatch where you're disconnecting ... if this is disconnecting your leavers, but still is a separate cable to the governor, then there is a possibility that you do not get full WO on the pump.... I cannot see that you can do this dis-connect for both engines through one hatch, unless there is a cable to the pump arm..., so we're back to LS's question ... Pictures of the setup ... if you have would be great !
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Exactly my point.
 
completely disconnected...from the governor.
I should have done better at english :)
the starboard governor is a bugger, need to lift the floor or reach in through hatch and disconnect.. its only a small ball joint on the governor arm.
port side motor is a piece of cake, as there is a central access hatch that lifts, so dont need to take the floor up.
anyway, thats all done, there is no discrepancy between the morse controls, and the governor...
 
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Im not 100% sure, but i dont think they will be too dificult. They would pass Latestarters low orbit test for the filler cap.
The stbd smoke when hot and off load too. Grey smoke, not much... But its there, and it certainly didnt when i ought the boat.
 
LS knows far more about these than me, but if your engines are pressurising the rockers, then it is most likely to be valve seals, or head gasket. If head gasket, then likely to be water in oil, overheating, or starting issues. Valves are not too big a job if you can get the head off.
 
Theres certainly no overheating issues. I changed coolant last year, its still clean and green, so not suspect head gasket or block leaking back. The worst motor has had head off about 20 plus years ago, i suspect down to a failed water injection manifold on the exhaust, which has signs of repair just after the turbo.
 
SO stone cold the engines vent a bit from the rocker box? Isn't perfectly normal? In any event, surely to know if it needs attention you need to quantify how much blowing out?
 
Unfortunately i have no way of doing this at the moment. Need a bit of thought in to it. There is an overboard vent from the rocker box, so just need to suss some method out.... More bloody research to do.
Is it blowby, or valves.... Only one way to find out really.... Off with the heads. Bugger.... Certainly know where near enough pressure to flip the filler cover....
:(

Damn... Thanks bgb.... :)
You just made me realise i never plugged the vents.... Helium still in the blood....
 
rafiki_ said:
I don't think blow by would pressurise the rocker cover. This would do the crankcase.
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There's a bloody great oil drain from the rocker box down into the sump, its how the oil thats come through the rocker shaft drains back, so any pressure in the crankcase, from rings in their bores for example, can vent out through the rocker box.
 
Rob,

Panic not, I would be pretty relaxed about the condition of valves on your motor.

Due to lousy water flow characteristics of the Ford block #6 was always at risk of piston pick up, however Sabre were a smart bunch and all high output engines have greater piston/bore tolerance on #6 to take account of the fact that the back cylinder tends to run mad 'ot' when motor being given the beans. Side effect of piston bore tolerance is that these engines tend to have high blow-by even when fit and healthy.

If you can speak to somebody who has the actual Sabre blow-by numbers making the tool is cheap and simple.
 
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