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Sigma cam belt


Garth

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It’s not engine out, but it’s not simple because Caterham advance the cam over the stock ford settings.   If you set it like standard ford you will lose horsepower.   Easiest option is get it done by a Caterham specialist, or be prepared to get your dial gauge out. 

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If its out now, get it done.  I would change a trimming belt if the opportunity arises, providing its had a reasonable service live.  In your example 8 years is beyond Caterhams recommendation but below Fords, so the choice is obvious.   

I suspect when the engine had upgrades it was changed then, but if you don't have evidence of that then a better safe that sorry approach is all that can be recommended. 

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Hi,

Had my 2010 Sigma 150's belt replaced last year at Millwood because of the potch with the timing, would also recommend have the water pump or aux tensioner replaced as per other manufacturers (e.g. VAG). The tensioner seized up causing the water pump to leak. This needed another trip to have that replaced. I was chatting there and anecdotally they were getting a number back after the cambelt was replaced. The aux belt has to come off first obviously. All were about the same age and type.

From what I understood the disruption of the change upset the custom built Caterham tensioner so that it constantly increased the aux belt tension putting lateral strain on the pump, ended up with a leak down the front of the block. The aux belt twanged like a violin string it was so tight. It's not a usual Ford Sigma part so doesn't figure on the Ford manual. All a bit of a pain

Andy

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