What is this noise on start up?

[effingpot]

When I start my Expedition for the first time each day - about 5 seconds in, it makes this huge grinding noise, like something moves (badly) but is having a problem. Not living in the US means I can't just get the Ford guy to take a look. I videod it this morning - the grinding sound is at 5 secs.

This only happens the first start each day. Other times in the day it seems fine.

Any ideas?
thanks
Mike

 

[Shantheman73]

When I start my Expedition for the first time each day - about 5 seconds in, it makes this huge grinding noise, like something moves (badly) but is having a problem. Not living in the US means I can't just get the Ford guy to take a look. I videod it this morning - the grinding sound is at 5 secs.

This only happens the first start each day. Other times in the day it seems fine.

Any ideas?
thanks
Mike

That sounds like your a/c compressor kicking in.
Turn off your HVAC system tomorrow morning before starting it and it prob won’t make that noise.

Mine has been making same noise lately and I recently had ford replace the compressor which ticks me off. I took it to them and told them to replace it again. Naturally they need to keep it overnight so they can hear the sound in the morning. I’m gonna make another appt.

Hope this helps!


2007 Ford Expedition Limited
Sent from my iPhone using Tapatalk

 

[effingpot]

That sounds like your a/c compressor kicking in.
Turn off your HVAC system tomorrow morning before starting it and it prob won’t make that noise.

Yes it is on full time so I'll try that - thank you.

 

[07navi]

I think you need a new ac pump, notice how when it kicks on it puts a drag on the serpentine and flexes the tensioner. (watch belt tensioner). If you don't have a set of ac gauges you need them to check high and low pressures. Did you recently add refrigerant? Too much will "slug" the compressor and cause that noise.

 

[effingpot]

OK so looks like you guys are correct. This morning, with the airconn switched off the engine started normally with no crunching sound. In fact, looking at that video again (above) you can see the little arm (or whatever it is) behind the cable vibrating as the noise happens. Not being a car techy can I ask in plain simple English what is actually happening at that point? I get it that the Airconn compressor is engaging but what does that translate into? Is somethign physicall moving? How do we work out what to do next?
Thanks

 

[MDSavage]

HOLD ON...DON'T SPEND ANY MONEY!

I have owned our 2014 5.4 Expedition from new. The vehicle has made this noise from new. Shortly after purchasing I took it to the dealer to fix it. Sounded like a trans / internal noise to me. Yes it would only do it on a cold start. Ford told the dealer to replace valve body, front pump, then they told them to find a similar vehicle on the lot to compare the noise. Heck, those engineers didn't know what to noise was either. I was going to turn the car in under our lemon laws here in Maryland until a person on the site here explained what was going on.

In 2014 Expys with a 5.4 the ac compressor is mounted low. After a long sit the refrigerant oil will lay in the compressor and if it isn't pushed up it can blow seals. The CASS system does this push when the system initially is turned on. I always leave the hvac on so the first thing each morning you hear the grinding like noise. The noise actually is the ac line rattling I believe. A quick test is to turn off the hvac the end of the day. Start up in the morning (no hvac) and drive a couple miles. Stop and put on the hvac. You should then hear the freaking noise. We have had the expy 5 years now with no problem. But, the noise still happens on a stone cold start.

In my opinion Ford knew about the problem and put it off in 2014 since they were going to EcoBoost in 2015.

Good luck but our dealer did a bunch of fixes to eliminate the noise. I still laugh with the service manager when we take the expy in for free oil changes under a customer for life plan.

 

[07navi]

OK so looks like you guys are correct. This morning, with the airconn switched off the engine started normally with no crunching sound. In fact, looking at that video again (above) you can see the little arm (or whatever it is) behind the cable vibrating as the noise happens. Not being a car techy can I ask in plain simple English what is actually happening at that point? I get it that the Airconn compressor is engaging but what does that translate into? Is somethign physicall moving? How do we work out what to do next?
Thanks

The spring loaded wheel that pushes on the belt to keep it tight moves briefly in and out when the compressor tries to lock up due to being overloaded with liquid refrigerant (slugged) and pulls harder on the belt momentarily.

 

[07navi]

From a 2014 post from sambo in this forum:

Air conditioner compressor noise

The noise you hear from the a/c compressor when it is first turned on is caused by where the compressor is located. I bought a new 2004 Ex pedition and it made this noise Ford calls (get this) CHUGGLE. I brought the truck back to the dealer so many times and was a pain in thier ass they finally printed out the service bulletin. It said "this cannot be repaired if you try to repair it, it will still make this chuggle sound and Ford will not reimburse you for the work if its under warrenty". The sound is caused by the liquid refrigerant and oil collecting in the compressor under certain conditions. Because the compressor is the lowest point in the system, poor engineering. The shop manual addresses this issue, in the manual its called "slugging". Ford was supposed to program the ECM to engage the compressor clutch while the engine is cranking to push out the liquid and oil slowly. Apparently this doesn't work. the dealer said this "will not hurt the compressor". I just retired after being an auto and truck mechanic for 47 years and this is BS the compressor is very delicate and won't take that for too long. It happens when the sun heats up the interior of the car causing the gas in the a/c system to expand forcing the liquid into the compressor if you notice this don't happen at night or in colder weather. To prevent it and save the compressor shut off the a/c before you park the car for several hours, when you restart the car DON'T turn on the a/c until the engine has fully warmed up, about 5 minutes. Hope this helps

 

[akacolonel]

My 2014 expy has done this since I bought it in 2015 with 40k miles on it. I didnt think it was the cam phasers, so wasnt too worried. Recently, out of boredom, determined it was a/c compressor engaging. But I didnt think about it being mounted low, and pag oil would settle. There are some sharp guys on this site.. thanx guys!!

 

[effingpot]

Super - thank you very much. I'm gonna go with the keeping the AC off option as a) it's cheaper, b) it's easy and c) I live in England so who needs AC anyway haha! (Mind you we are getting summer temps these days in Feb so maybe we do need AC!)