New TSB for 3.5 GDI Sartup Rattle 15-0131
- Thread starter BiGMaC
- Start date
glock-coma
New member
It's like this, but not nearly as bad14SHOCAR said:
http://youtu.be/2yGPqSYGi5E
Thought I would share a startup rattle from my 2010 SHO. Took these videos this summer as it had between 55k-60k miles on it.
http://vid1374.photobucket.com/albums/ag404/markssho/SHO2/VID_20150815_102452538.mp4
http://vid1374.photobucket.com/albums/ag404/markssho/SHO2/VID_20150821_073524526.mp4
http://vid1374.photobucket.com/albums/ag404/markssho/SHO2/VID_20150828_075733945.mp4
On the first link, you can hear it best. I would say that one is around the medium volume level. I've heard it much louder. The other two are not as loud. It really isn't consistent as far as the loudness goes. That's why it is difficult to capture it on video (who's gonna video every startup).
http://vid1374.photobucket.com/albums/ag404/markssho/SHO2/VID_20150815_102452538.mp4
http://vid1374.photobucket.com/albums/ag404/markssho/SHO2/VID_20150821_073524526.mp4
http://vid1374.photobucket.com/albums/ag404/markssho/SHO2/VID_20150828_075733945.mp4
On the first link, you can hear it best. I would say that one is around the medium volume level. I've heard it much louder. The other two are not as loud. It really isn't consistent as far as the loudness goes. That's why it is difficult to capture it on video (who's gonna video every startup).
66 Galaxie
New member
I keep wondering how much a pre-oiler may or may not help protect our engines from any start up rattles due to bad cam phasers and/or the tensioner on the timing chain.
glock-coma
New member
Your first video is exactly what mine sound like. Very inconsistent loudness and sometimes doesn't do it at all.markssho said:
shaneirish
New member
my SHO makes this rattle at cold start ups. I had a feeling that's what the noise was.
Any idea if it's just a noise or if it'll eventually cause a problem ?
What it the repair cost ? I'm at 73K miles. Had this noise going on for about 10K miles. The noise is pronounced but goes away real quickly. My car still runs strong so I can't tell it's causing any other problems at this point.
Any idea if it's just a noise or if it'll eventually cause a problem ?
What it the repair cost ? I'm at 73K miles. Had this noise going on for about 10K miles. The noise is pronounced but goes away real quickly. My car still runs strong so I can't tell it's causing any other problems at this point.
SoCalFlexin
New member
I have a 2012 Titanium Ecoboost Flex with 41,000 mile on it. That is exactly what my Flex sounds like on a cold start.
http://vid13.photobucket.com/albums/a290/dirkdiggler90504/IMG_2593.mp4
http://vid13.photobucket.com/albums/a290/dirkdiggler90504/IMG_0140.mp4
http://vid13.photobucket.com/albums/a290/dirkdiggler90504/IMG_2593.mp4
http://vid13.photobucket.com/albums/a290/dirkdiggler90504/IMG_0140.mp4
I think that the longer the drain interval, the more likely you should move up to 5W30. But if you use the severe duty intervals, 5W20 should be fine. If you then start hearing rattle (even 1-2 seconds long), try switching out to the 5W30, and see if that helps.MeanKS said:
I would just use a good quality synthetic oil changed at 5k intervals and here's an article that might help a bit. Z Right Oil is Critical
Engine oil has always been used as a lubricant and as a coolant. What new function does engine oil perform on Ti-VCT engines that it never did on the Ford CVPI 4.6L V8? It acts as hydraulic fluid to operate the cam phasers.
With engine oil used to operate the cam phasers, two aspects of preventative maintenance become even more critical. First, these new Police Interceptor engines MUST have the right weight-viscosity of engine oil. The PCM opens up valves to control the cam phasers based on the correct oil. Too heavy or too light and the cam phaser will over-react or under-react. The VCT phaser not responding correctly to the PCM will cause a DTC: an error in action versus expected cam advance or retard.
Exactly the same condition can occur with dirty oil, specifically oil that has depleted the anti-foam additives. Oil with tiny foam (air) bubbles is more compressible than oil with no foam. So, oil under pressure has to break these tiny bubbles before it can act as a true hydraulic fluid. That will cause a slight delay in the response of the cam phasers to the PCM command.
It won’t be much of a delay, but the PCM again monitors actual versus expected and can throw a DTC. Change the oil and the problem goes away. How about using synthetic oil? Nope. It is the anti-foam additive package that gets depleted, not the breakdown of the base stock.
Engine oil has always been used as a lubricant and as a coolant. What new function does engine oil perform on Ti-VCT engines that it never did on the Ford CVPI 4.6L V8? It acts as hydraulic fluid to operate the cam phasers.
With engine oil used to operate the cam phasers, two aspects of preventative maintenance become even more critical. First, these new Police Interceptor engines MUST have the right weight-viscosity of engine oil. The PCM opens up valves to control the cam phasers based on the correct oil. Too heavy or too light and the cam phaser will over-react or under-react. The VCT phaser not responding correctly to the PCM will cause a DTC: an error in action versus expected cam advance or retard.
Exactly the same condition can occur with dirty oil, specifically oil that has depleted the anti-foam additives. Oil with tiny foam (air) bubbles is more compressible than oil with no foam. So, oil under pressure has to break these tiny bubbles before it can act as a true hydraulic fluid. That will cause a slight delay in the response of the cam phasers to the PCM command.
It won’t be much of a delay, but the PCM again monitors actual versus expected and can throw a DTC. Change the oil and the problem goes away. How about using synthetic oil? Nope. It is the anti-foam additive package that gets depleted, not the breakdown of the base stock.