Alternative rod bolts ?

[JDOliver]

Anyone have an ARP or such alternative to the stock bolts ? I had a couple snap on an 1800 I am rebuilding and need to replace them all.

Or consiquently, do I really need something stronger even for something modified using the same rods ? I have a majority of the setup I may give it a little turbo boost. 12lbs or less.

[BrianAz]

I never heard of rod bolts snapping. Have you checked the accuracy of your torque wrench ??

// Brian.

[kilrwail]

I understand that rod bolts should always be replaced, since they stretch a bit under the proper torque, rendering them inappropriate for reuse.

[mdrburchette]

The stock rod bolts should be fine and in fact, I know of several Fiats racers that use them. On the same note, I had a few stretch on me when I tried reusing them so I would suggest buying new. I've seen where ARP has a crossover number for X19 bolts, but I don't know about the Spider ones.

[JDOliver]

They were the original and snapped off when attempting to torque them down at less than full torque. I have two wrenches that I check against each other.

[engineerted]

Make sure you are reading the right units, Nm or Ft-lbs most wrenches have both and get it wrong and snap!

Also make sure you are using the correct bolt torque values, 1800 rods use 9mm bolts and 2000 rods use 10mm bolts torque values are differnt.
See thread below!
http://www.fiatspider.com/f08/viewtopic ... que#p23044

Ted

[JDOliver]

1800 rods use 9mm bolts and 2000 rods use 10mm bolts torque values are differnt.

That may be what got me. The Linea Rossa shop manual only has the 10mm value and thats the torque I used. Thanks.

[engineerted]

Yep I have done the same thing, got down to the last bolt and snap! WTF! Then i found out that the torque values are for the 2L. Replace all the rod bolts even the ones that torqued down correctly.

Ted

[MNspiderman]

I haven't had them snap but i have had them stretch. You can just feel something ain't right while torquing them buggers down. Its like you can sorta predict when the torque wrench should click but it doesn't and when you reach an extra half turn and still no click its a bad thing.

[ventura ace]

What torque are you using?
36 - 40 in lbs is the recommended torque. More than that, and you'll have trouble

Alvon

[JDOliver]

I am thinking I only tightened them all snug then immediatly broke two torqing them down and quit.
I am currently serching for an alternative set from an entirely different car that would be widely available.
Last time I looked it was $100 for a full set of Fiat bolts and nuts. Most of the other 4cyls that I have looked at are $40.

[mdrburchette]

If it's any consolation, you can probably reuse your bolts. I had to reuse a couple when the vendor forgot to upsell some for the one rod we had to R&R because of aux shaft interference.