Toyota Timing Belt Profile

[knightrous]

I'd like to look at using a 4AGE timing belt for a project and would like to get some pullies to suit.
Does anyone know what pitch and profile the Toyota timing belts and pullies adhere to?

[jondee86]

Just about bet money that it is an HTD-8M profile = 8mm pitch round tooth. Any power transmission place should be able to sell you 8M pulleys in a range of diameters (tooth numbers), but you will have to go with a standard pulley width. From memory 20mm wide pulleys are about 22-23mm wide inside the flanges to avoid wearing the edges of the belt.

Cheers... jondee86

[knightrous]

Thanks for that Jondee.
I dug out an old 1MZFE belt and it's definitely a HTD-8M, but looking at the 4AGE timing gears, they look more like a 9-10mm pitch (9.525mm?? as they certainly don't fit the 1MZ belt.

[jondee86]

Yeah... just as well I didn't bet money !!! A quick look in the interweb yields this...

DAYCO TIMING BELT -- 42.37 in. effective length, 0.75 in. top width, 113 teeth;

A quick poke around in the shed yielded cam pulley width 24mm, belt width 19mm, belt tooth pitch 9.5mm. So that 4AGE belt is a mongrel round tooth design with a 3/8" imperial pitch. Good luck in finding pulleys for that !!!!

Cheers... jondee86

[andrew_mx83]

Yeah ive been stung by this one, the Toyota belts are not htd.... close but no cigar. I tried to runaway smaller pulley for my oil pump but no love getting anything aftermarket to match.

[knightrous]

Yeah ive been stung by this one, the Toyota belts are not htd.... close but no cigar. I tried to runaway smaller pulley for my oil pump but no love getting anything aftermarket to match.

Which motor did you try that on?

[andrew_mx83]

7m-ge. Closest was 8mm htd but as above 4age is different pitch.

Why do you need a 4age belt? Just get the same length in a standard htd belt and buy pulleys to suit....