[chaser x]

Hello all new here i had a serious issue with my 2013 Cruze. My coil pack blew out had three sparks and one spark plug damaged. Can the spark plug thread that was damaged be re threaded? Three of the new sparks tighten in but one doesn't.

 

[jblackburn]

You will basically have to put a helicoil into the head to "rethread" the spark plug tube.

https://m.youtube.com/watch?v=1BTTur7Fk6k

 

[XtremeRevolution]

Let me see if I understand this correctly...your coil pack "blew out," and that damaged the threading on the cylinder head?

 

[jblackburn]

Let me see if I understand this correctly...your coil pack "blew out," and that damaged the threading on the cylinder head?

Yeah I just took it as somehow he stripped a thread removing/installing a spark plug. Shrug.

 

[chaser x]

Yes it did the others are good but one thread. I never experience anything like that every went nuts i owned lot of cars and never had that type of problem.

 

[XtremeRevolution]

On a 1.8 LS even. Yeah, as J said, you'll need a helicoil.

 

[chaser x]

Will that cause a warranty to void? Is this normal after 55,000 miles has anyone else experience this?

 

[jblackburn]

Will that cause a warranty to void? Is this normal after 55,000 miles has anyone else experience this?

You would be the first we've heard of. Warranty...probably wouldn't void anything, but not sure this (a replacement head) would be covered under powertrain either.

 

[obermd]

I think a replacement head would be covered under power train.

 

[jblackburn]

I think a replacement head would be covered under power train.

Or would they blame a stripped thread on an owner/mechanic? I think this is more likely.

It was common on Ford 5.4's, but this is the first I've ever heard of for these.

 

[chaser x]

Here the update the dealer going to use the helicoil to repair the thread everything checked out fine.

 

[chaser x]

Really weird how one spark plug comes lose and cause trouble is this a common issue for the cruze spark plugs to get lose and cause the coil to fail?

 

[Merc6]

Really weird how one spark plug comes lose and cause trouble is this a common issue for the cruze spark plugs to get lose and cause the coil to fail?

It all depends on how long the car was driven in that condition.

 

[chaser x]

Are sparks not supposed to come lose on there own? Never heard of such a thing is it common on other brand cars?

 

[XtremeRevolution]

They do get loose, especially if you remove them and put them back in, as the crush washer is expended and no longer provides protection against backing out.

 

[Gus_Mahn]

Helicoil is not the best repair for spark plug holes. Timesert is the best repair. Blown out plugs are fairly common common on 5.4 F150's from about 15 years ago. Those trucks only had about 3 threads in the heads

 

[chaser x]

I never seen spark plugs come lose on there own i though the coil pack would still hold them in place even if they came lose. If i get another blow out ill claim lemon law the car is turning into a lemon to me and i take care of it still has low miles too.

 

[jblackburn]

The threads hold them in place. You've got probably 170 PSI on the other side of that plug - if it's loose or misthreaded into the soft aluminum head, the coil pack isn't going to do a thing to hold it in.

 

[Gus_Mahn]

The threads hold them in place. You've got probably 170 PSI on the other side of that plug - if it's loose or misthreaded into the soft aluminum head, the coil pack isn't going to do a thing to hold it in.

Only when cranking. It's probably 10-15 times that during combustion.

 

[jblackburn]

Only when cranking. It's probably 10-15 times that during combustion.

Good point.