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Timing chain stretch

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BIG BLOCK FORD :: GENERAL TECH :: ENGINE TECH

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Timing chain stretch Empty Timing chain stretch

Post  460Dave April 19th 2015, 3:31 pm

I have the 545 down for some maintenance and have a question regarding the timing chain. The engine only has approx 40 passes on it. The chain was a new Ford Motorsport double roller unit when installed last October. I sent the cam gear to Comp and had them drill it for double pins. When I installed it, it was snug. Today, when I took the front cover off, there is 5/8" deflection. The engine is a mech roller 810lb spring pressure.

Is it normal to have that much wear? Can I just put a new chain on my gear set? I have always been taught to change the whole set, but I need the double pinned cam gear. What chain might be my best option?

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Post  bbf-falcon April 19th 2015, 9:03 pm

If the gear looks good.Run it omo. Very Happy

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Post  butterbean April 19th 2015, 9:36 pm

yes you can just change the chain but 40 passes I would just reuse it, they all will stretch about that much anyway
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Post  460Dave April 20th 2015, 7:33 am

I've seen 100K mile street engines with chains that looked the same. My concern was that it had so little time, yet was stretched what I consider quite a bit. Is there a chain that might stretch less than the FMS one?

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Post  gt350hr April 20th 2015, 12:09 pm

The chain should have ''play" when installed. If it doesn't , cam bearing and main bearing wear can result. Often times the "play" only affects cam timing by one degree or less. ( forward and backward movement)


Last edited by gt350hr on April 21st 2015, 11:32 am; edited 2 times in total

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Post  rmcomprandy April 20th 2015, 3:18 pm

The German manufactured chain is the best chain out there ... I can not remember the name.

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Post  maverick April 20th 2015, 7:55 pm

IWIS ?
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Post  manofmerc April 21st 2015, 5:27 am

If you are looking to just change the chain summit carries the replacement chain .It is a Cloyes part number 9-134 .I have the same timing gear set as you it was a direct replacement .Doug

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Post  manofmerc April 21st 2015, 5:28 am

If you are looking to just change the chain summit carries the replacement chain .It is a Cloyes part number 9-134 .I have the same timing gear set as you it was a direct replacement .Doug

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Post  manofmerc April 21st 2015, 5:29 am

If you are looking to just change the chain summit carries the replacement chain .It is a Cloyes part number 9-134 .I have the same timing gear set as you it was a direct replacement .Doug

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Post  460Dave April 21st 2015, 7:23 am

Thanks Doug
Thanks Doug
Thanks Doug

Smile

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Post  maverick April 21st 2015, 8:17 am

Laughing
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Post  maverick April 21st 2015, 8:17 am

Laughing
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Post  maverick April 21st 2015, 8:18 am

Laughing
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Post  bbf-falcon April 21st 2015, 5:15 pm

NOW,thats funny right there Laughing

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Timing chain stretch Empty How did I do that?

Post  manofmerc April 22nd 2015, 5:46 am

If a double post isn't bad enough I guess my triple is three times as bad sorry Laughing

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