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Jac Mac · 09-28-07, 02:08 AM

Ron,
Straight Six motors are probably the most susceptible to tossing belts due to harmonics-next time your checking the ign timing with a strobe light run the motor up thru its rev range and watch the belt, at some point it will develop a 'snake', usually just as it leaves the crank pulley. Make up a sturdy bracket or lug that is just clear of the belt OD to ensure the belt can not jump the pulley it is about to enter rotation wise . Sometimes going to a smaller crank pulley will help as it reduces actual belt speed.

Perhaps you could adapt the radiator overflow hose to the fitting on the 'cool suit', that way any engine overheating problems would get your immediate attention and you would be in absolutely no doubt as to which action to take to prevent further damage-to anything!

Jac Mac

09-28-07, 02:08 AM	#6 (permalink)
Jac Mac jac mac 10 tenths Join Date: Dec 2005 Location: Gore N.Z. Posts: 1,575 Rep Power: 20	Re: 260Z and Ron Out At Roebling, Sept 2007 Ron, Straight Six motors are probably the most susceptible to tossing belts due to harmonics-next time your checking the ign timing with a strobe light run the motor up thru its rev range and watch the belt, at some point it will develop a 'snake', usually just as it leaves the crank pulley. Make up a sturdy bracket or lug that is just clear of the belt OD to ensure the belt can not jump the pulley it is about to enter rotation wise . Sometimes going to a smaller crank pulley will help as it reduces actual belt speed. Perhaps you could adapt the radiator overflow hose to the fitting on the 'cool suit', that way any engine overheating problems would get your immediate attention and you would be in absolutely no doubt as to which action to take to prevent further damage-to anything! Jac Mac