[alfa] T-chains and belts

[Sam Wacht <sam_vfr@xxxxxxxxx>]

I believe there is a gov't push to go back to timing
chains (in the US), I believe that is one of the
reasons Lotus used the Toyota engine in the Elise
instead of the Rover engine (in the US), it either has
a chain or is being developed to have a chain.  There
has been discussion about whether this is due to noise
or emissions (harder for a chain to slip a tooth and
screw up emissions), but I think in the next few years
it will be hard to find a belt driven cam engine.

The problem with the V6 belt is the amount of contact
it has with the cam by the distributor/oil pump drive,
that and oil leaking on it from the original tensioner
or water/antifreeze from the 30k water pump.  A
"friend" with a honda had 122k on the original T-belt
when he popped the counter-balance shaft seal and
dumped all the oil, the head was the first thing to
suffer from loss of oil and froze the cam in the head
and instead of belt breaking, the gear bolted to the
cam broke, this made me realize a properly designed
cam belt is as strong as I could want, plus regular
replacement ensures proper cam timing.  Chains will
stretch over time and mess up timing, I have heard of
chain links being removed on Old Benz's to keep them
tight.

How about Gear driven cams, no stretch, no break, just
lots of whining!

Sam

'86 GTV6
'88 Verde "Rusty"
'88 Verde "Donor"


	
		
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