Light cylinder wall scoring & trans issues

[BreadcumbMeta]

Hey guys,

Sorry for the long post just a bit worried about my car.

I Recently got a 2018 mustang gt 10R80 from the dealership with about 45k miles on it.

I've put about 1,000 miles on it since I purchased it in February.

The car had rpm fluctuation/ surging at red lights and seemed like it wanted to die.
The dealership said that the car recently had a trans relearn performed due to a " harsh rattle that could be heard in the
engine bay" and that after a 500 mile period it should be fine.

Unfortunately, I haven't been able to drive the car much but I did pass the 500 mile mark since they did the relearn and the car stalled on me at a light afterwards. I also had the transmission hang up on first gear under normal acceleration in drive and not shift into 2nd until high 3k- low 4k rpm.

Additionally, the engine was making some weird noises and I decided to add liqui moly friction modifier, which did reduce the noises. Problem is I later found some scoring in the cylinder walls and some spark plugs with a good amount of oil on the threads.

I found about 3 sparkplugs with oil up to the base of the threads and the rest had oil on about 4-5 threads. I also found 3 cylinders with what looks to be about one or two drops of fresh oil. Does this seem excessive or is it normal for gen 3 coyotes?
The pictures of the scoring is just from the drivers side bank, the passenger side bank cylinder walls look to be in about the same condition. Is this level of scoring considered acceptable for 46k miles? I don't have the full service records, but I believe it is the original short block from November 2017. It doesn't seem too bad compared to other gen 3 coyote cylinder walls that I've seen.

I attached some pictures and videos, if you could please give me your opinion on them I'd really appreciate it. I don't know what's normal for coyotes and just want to make sure I'm informed before I take it to the dealership. Luckily the car is certified pre-owned so it is still under warrranty and I haven't installed my nGauge yet.

Sponsored

 

[Helios]

Im not sure whats normal or not anymore on the gen3, and 45k miles is alot of mileage (most are under 10k) and uses their car only occasionally. You have the tick and then you have the engine rattle these are the 2 common problem you hear often. But not so many have blown or got engine replaced under warranty, ford seems to just get away with it by telling customer (its normal)

If your under warranty and really concerned, take your pictures and bring your car to a dealership you trust in. Have them look at the pictures maybe ? and explain you just got the car not too long ago and think you got ripped off. That there is something major going on

 

[BreadcumbMeta]

Im not sure whats normal or not anymore on the gen3, and 45k miles is alot of mileage (most are under 10k) and uses their car only occasionally. You have the tick and then you have the engine rattle these are the 2 common problem you hear often. But not so many have blown or got engine replaced under warranty, ford seems to just get away with it by telling customer (its normal)

If your under warranty and really concerned, take your pictures and bring your car to a dealership you trust in. Have them look at the pictures maybe ? and explain you just got the car not too long ago and think you got ripped off. That there is something major going on

Yeah, i'm taking it in tomorrow. Managed to catch the surging on video so hopefully that helps.

 

[GT Pony]

The engine noises in the 2nd video sounds like the 2K RPM rattle. Can you hear that noise while cruising down the road at ~2K RPM also. The noise in the 4th video doesn't sound like the BBQ tick because it's not random, but in time with the engine RPM. Could be related to the noise at 2K RPM. Almost sounds like noise in the valve train - hard to tell in a video. The engine sounds pretty quiet when cold, but becomes noisy when fully warmed up ... is that true?

The oil on the plugs most likely indicates that cylinder is using some oil, or getting oil into the cylinder. Are the cylinders that the oily plugs came out of close to the PCV hose connection on the intake manifold? That would be the first two cylinders from the front of the engine on the passenger side. If so, then it could be oil that is getting into those cylinders from the PCV system. Do you have a PCV oil catch-can on this car?

The very slight cylinder wall scratches look normal. Ford has a General Service Bulletin on cylinder wall scratches, and those are well within normal.

The spark plug gaps look huge. Did you measure the gaps and check against the specs. Probably wouldn't hurt to put set of new spark plugs in.

 

[BreadcumbMeta]

The engine noises in the 2nd video sounds like the 2K RPM rattle. Can you hear that noise while cruising down the road at ~2K RPM also. The noise in the 4th video doesn't sound like the BBQ tick because it's not random, but in time with the engine RPM. Could be related to the noise at 2K RPM. Almost sounds like noise in the valve train - hard to tell in a video. The engine sounds pretty quiet when cold, but becomes noisy when fully warmed up ... is that true?

The oil on the plugs most likely indicates that cylinder is using some oil, or getting oil into the cylinder. Are the cylinders that the oily plugs came out of close to the PCV hose connection on the intake manifold? That would be the first two cylinders from the front of the engine on the passenger side. If so, then it could be oil that is getting into those cylinders from the PCV system. Do you have a PCV oil catch-can on this car?

The very slight cylinder wall scratches look normal. Ford has a General Service Bulletin on cylinder wall scratches, and those are well within normal.

The spark plug gaps look huge. Did you measure the gaps and check against the specs. Probably wouldn't hurt to put set of new spark plugs in.

Yeah I've noticed the rattle while driving. I've noticed that it's typically louder when cold, then quiets down when it's warm. However, the rattle does seem to be consistent.

The car is still stock so no catch can. The spark plug with the most oil on it was actually found in what I think is cylinder 8, right next to the firewall on the driver's side of the engine. I did find one that looked similar on the passenger bank in cylinder 3. I'm using mmr's coyote firing order diagram for reference

That's a relief to hear then. I did check the spark plug gaps, but my tool only goes to .045. The gap was only slightly bigger so I assumed it was good enough. I read that the plugs should be around .05 is this correct?

 

[Disciple710]

The engine noises in the 2nd video sounds like the 2K RPM rattle. Can you hear that noise while cruising down the road at ~2K RPM also. The noise in the 4th video doesn't sound like the BBQ tick because it's not random, but in time with the engine RPM. Could be related to the noise at 2K RPM. Almost sounds like noise in the valve train - hard to tell in a video. The engine sounds pretty quiet when cold, but becomes noisy when fully warmed up ... is that true?

The oil on the plugs most likely indicates that cylinder is using some oil, or getting oil into the cylinder. Are the cylinders that the oily plugs came out of close to the PCV hose connection on the intake manifold? That would be the first two cylinders from the front of the engine on the passenger side. If so, then it could be oil that is getting into those cylinders from the PCV system. Do you have a PCV oil catch-can on this car?

The very slight cylinder wall scratches look normal. Ford has a General Service Bulletin on cylinder wall scratches, and those are well within normal.

The spark plug gaps look huge. Did you measure the gaps and check against the specs. Probably wouldn't hurt to put set of new spark plugs in.

Is there any videos you know of that has the 2k rattle? I’m curious if I have it. I have the tick for sure. Just took it in to Ford today for oil consumption, they are gunna replace the pcv valve, and want to do a test drive to verify the ticking.

 

[GT Pony]

Is there any videos you know of that has the 2k rattle? I’m curious if I have it. I have the tick for sure. Just took it in to Ford today for oil consumption, they are gunna replace the pcv valve, and want to do a test drive to verify the ticking.

Big thread about the 2000~2200 RPM rattle in this forum. Should be some videos in that thread.

https://www.mustang6g.com/forums/th...nder-damage-pics-ford-buyback-process.102509/

 

[Disciple710]

Big thread about the 2000~2200 RPM rattle in this forum. Should be some videos in that thread.

https://www.mustang6g.com/forums/th...nder-damage-pics-ford-buyback-process.102509/

Looks like mine has the rattle too ):

 

[Kong76]

Yea .050 is fine for gap on oem. I think it's .049-.053.

Sponsored