05-03-2018, 07:28 PM
(05-03-2018, 07:04 PM)Reckless Rat Wrote: That's the main reason why I have gone for Polyethylene, to avoid the oil contamination issue. I wonder if the original reason for Austin going to rubber mounted engines was purely to reduce vibration between the block/crankcase and the chassis, which I guess would become intolerable in the cabin, particularly with the greater emphasis from 1933 onwards for saloon cars rather than open tourers? Does anyone have any info?
The standard set-up is still pretty firm if bolted up tight so I can't really see there'll be a detectable difference with the poly, apart from durability. Shame I couldn't turn the little inserts out of the same material but I'm sure the silicone rubber I have ordered will do the job just as well.
Now, when I eventually get round to removing and replacing the engine (it has to come out because the clutch release bearing is knackered) should I :
a) bolt everything up tight and see how it goes
b) leave one of the rear mountings a little loose to allow for chassis flex
c) add a used valve spring to one or both (or all) of the mountings.
The car is only used on the road and I have grown out of the need to drive it "banzai" all the time.
If option 'C' is the majority view I will happily accept any springs that might find their way down here because I don't have any other than the ones in the engine.
B
Personally I do them up about finger tight; 3 that is, the fourth is inserted but distinctly loose. Never used valve springs. If you did I guess you'd want a steel washer to stop them eating your engine feet. No evidence that my way is the best! But I've not had any particular problems.