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Timing belt Mhz


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All ready to pop my refreshed engine back into the S4 but just want to check the belt tension specs. Will be doing it via Mhz as I don't have the deflection measurement equip and do my Ducatis in this manner. Could someone confirm the correct Mhz please.


Thanks in advance

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5 hours ago, fjmuurling said:

Spec is between 110 - 120 Hz not MHz

This is not correct.

Spec is between 100 - 110 Hz

Engine at 30° BTDC with the colourd timing dots pointed to each other, they will not be in line.

This is for the engine with a HTD (rouded tooth profile) belts.

Cambelt Frequentie Lotus info.pdf

Esprit Freak

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  • Gold FFM

Gates has a good (free) app specifically to measure belt tension.

I have made many mistakes in my life. Buying a multiple Lotus is not one of them.


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