Duratec flywheel bolts

[classic1952]

A friend has purchased a Fidanza alloy flywheel for his 2.0 Duratec. The problem is, this is 17mm thick, whilst the flywheel bolts are only 25mm. The crank flange is also 17mm and fully threaded, suggesting the need for 34mm flywheel bolts. Does anyone know if this is correct and where they can be obtained? Have drawn a blank with Fidanza, ARP and several others. One source suggested the original dual mass flywheels used 31mm bolts which may just be sufficient. Has anyone any ideas?

[Rob Walker]

Ford OE flywheel bolts have only 21mm of thread

[classic1952]

Quoting Rob Walker: 

Ford OE flywheel bolts have only 21mm of thread

 

What length are they under the head? They generally seem to be 25mm but the dual mass flywheel version are said to be 31mm which is probably enough.

[Rob Walker]

21mm length to underside of head. Just measured the OE ford ranger and Titan ultra light flywheels and they are both 9mm thick at the mounting flange. Therefore 12mm of thread is screwed into the Crank. Based on this you would need 29mm of thread under the head of the bolt. I cannot help you with a supplier of bolts.

 

Edited by - Rob Walker on 17 Dec 2013 11:00:24

[classic1952]

Quoting Rob Walker: 

21mm length to underside of head. Just measured the OE ford ranger and Titan ultra light flywheels and they are both 9mm thick at the mounting flange. Therefore 12mm of thread is screwed into the Crank. Based on this you would need 29mm of thread under the head of the bolt. I cannot help you with a supplier of bolts.

 

Edited by - Rob Walker on 17 Dec 2013 11:00:24

 

Thanks for that. The answer lies in Mazda bolts at 31mm, sold at $4.02 each in Australia!! Probably sold here as well as they are apparently used on the 2.0 MX5 engine which is the same family as the Duratec.