360 Timing belt tensioner question

A. Yes its leaking. Throw it away.
B. No need to remove tensioner to compress it. I do it regularly.
C. Measurement of gap is not the correct way to adjust the timing belts.
It should be 190-220 HZ and the pin should still be able to go clear through the hole.

 

If they are the correct bolts in good condition there is no need.

 

Would it be fair to say that this bearing inspection/replace issue is a fine example of why Ferraris have such a short belt replace window ?

 

That was not a bearing, it was a tensioner. With the belt failures those of us who have done this every day for a few decades do not consider it a short window.
Only rookies with no experience or brains consider it a short window.

 

What bolts do you speak of? Curious since I’m doing this now.

 

Thanks!

 

Haha! Been there, done that.

https://www.ferrarichat.com/forum/threads/whats-so-special-about-these-50-screws.629734/

 

Wow that’s pretty bad. So I need 2 of each correct? 2x205693 and 2x185234. That’s $300 from Ricambi. I’ll buy it, but that’s insane!

 

Why don't you check before ..you may have them already

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With the previous lack of quality service work done on the car, I doubt it, and prefer to remove everything the Cauley Ferrari of Detroit touched anyways. I’m so paranoid at this point.

 

Having analyzed the firmware on 360's probably more than anyone else on the planet, IMHO, I believe in this case Ferrari engineers got this call wrong. They tried to fix a 'software problem' with a hardware fix - sure it makes the part more robust but doesn't solve the underlying issue. I don't know, maybe Bosch kept them in the dark about what was 'really' happening.

 

Did you check the vin ?

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Can you explain ..I must have missed something ?

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Yes. Unfortunately my car is barely within the range.

 

I was a long time ago, around circa 2007 that I posted about it so you are forgiven if you missed the post

Here's a bill from year 2000 on a 1999 Ferrari 360 Modena (EU car) which had a total catastrophic engine failure which was replaced under warranty. The car was less than a year old...

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I believe that variator failure debacle of all those years ago was a bit of a red herring, and actually only a contributory fault which failed for being the 'weakest link'. I'm suggesting that the original variator design (yes it was a weak link too obviously so not totally without blame), perhaps it was not the main cause of failures. I think it was actually caused by a software / logical design issue in the 360 firmware!

Obviously there is more than one way to solve an engineering problem, rather than attempting to fixing the "outsourced' engine management software, i.e. the in my humble opinion, the absolute root cause, the software. Instead the engineers tackled it by attempting to solve it mechanically. Even if they knew I am sure Bosch wasn't going to admit liability as to why Ferrari's engines where lunching themselves less than a year into the new model's launch!

I think it was related to the way the 'exhaust bypass' valves where programmed to operate. If you where over a given rpm (2,920rpm) AND throttle opening (69%) they where opened (i.e. loud with a hysteria so they wouldn't fluctuate when on the edges) however, if you then backed off the throttle aggressively (for whatever reason) or braked suddenly at higher rpms the bypass valves will instantly snap closed (even at 8,600rpm!). This does NOT happen on the later models, its fixed.
I believe this can occur quite regularly if your driving the car hard, particularly on the track and I am thinking the repeated stress of snapping closed those bypass valves at close to the redline (imagine the back pressure wave it causes) over time the causes metal fatigue. Not straight away but after repeat cycles occurring over time. I think this lead to crack formation. I believe the cracks/metal fatigue of the said variators where addressed by simply beefing up the part rather than solving the reasons why it happened in the first place.

The bug is present in every single production factory 360 firmware. I have fixed it in all my revised upgraded firmware's (yes you have it Mikey so your good!), and the factory also fixed this glaring issue starting with the F430 too, but all models of the 360 including the Challenge Stradale had the issue. Obviously the upgraded parts held the stresses but I still think its better the fix the root causes, its got to be better for longevity too!

 

Thank you for that explanation!

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Dude, you’re awesome!

 

yes