Advice required: 2006 Manual vs 2008 low mileage F430

[Modificato]

What's the root cause mark?

[MWStewart]

What's the root cause mark?

The rod bolts stretch and/or the rod caps break. Said builder is of the opinion that the bolts and caps used are on the edge for a flat plane crank application with this rod ratio.

[Mike01606]

I've now seen four engine failures. The incidents aren't known because of fear of the cars' value being affected. The (very) knowledge engine builder I deal with has direct experience: the big ends become oval and "It only takes a few 100's of a millimeter before it fails.".

I'm going to check mine at the 40k interval.

There’s been a couple on FChat in the last year or so.
As above “I’ve got this knocking noise” then “I need a new engine” then tumbleweeds......

Should be fairly inexpensive to check and shouldn’t be a cause for concern now a known issue.


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[Modificato]

Wonder if the factory has enough occurences for it to be a registered issue yet and / or any upgrades took place for the 458.

It's not something that was triggered as a known failure mode in the development program according to my sources.

Having said that there is a dead 458 with significant engine damage that everyone is keeping quiet about.

[MWStewart]

458 rods are 3 mm longer meaning the engine has a better rod angle mid-stroke. They also have different rod bearings.

The F430 Challenge has stronger rods and bolts.

The rod angle/ratio would have been fully understood at design time. Either weight optimisation went too far, or the bean counters did...

[Mike01606]

Having said that there is a dead 458 with significant engine damage that everyone is keeping quiet about.

Possibly one of the 200 V8’s covered by the crankshaft recall?


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[Modificato]

No the crankshaft issue was a manufacturing defect where as these guys are talking connecting rod cap bolts.

The 458 is a bore and tolerance related issue exacerbated by a lack of use...so far there’s more to come out on that one.

[Modificato]

458 rods are 3 mm longer meaning the engine has a better rod angle mid-stroke. They also have different rod bearings.

The F430 Challenge has stronger rods and bolts.

The rod angle/ratio would have been fully understood at design time. Either weight optimisation went too far, or the bean counters did...

Could be a GD&T stack-up issue which is Ferrari’s Achilles heel IMO.

Sourcing challenge parts could well be the best route.

[Mike01606]

Could be a GD&T stack-up issue which is Ferrari’s Achilles heel IMO.

Red card shown!....I’m sat a work looking at a tolerance stack issue ATM so please can we get back on topic [emoji3]


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[Modificato]

Red card shown!....I’m sat a work looking at a tolerance stack issue ATM so please can we get back on topic [emoji3]


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Sorry Mike - believe me I feel for you...