Engine failure

[Traffic22]

Happy for you. Sucks you had to pull it apart, so glad your engine is good. Good luck getting it back together. And 3 hours out of the car, impressive.

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[tdstuart]

A post detailing apex headstud failure: https://www.mustang6g.com/forums/threads/warning-apex-headstud-failures.189969/#post-3814125

It would be helpful if you could share when you got the headstuds and how many miles you had on them before the motor broke.

 

[Mad1186]

Also OP, I wouldn't worry too much about the staining if you can't feel it on your finger. It's also probably wise to try and clean up the bottom end as best of you can of the old contaminated oil, it tends to be hard on bearings.

I definitely did a deep clean on the bottom end.

 

[Mad1186]

Yep same thing happened to me. 3 Studs loose. My bearings spun and I noticed when I tore it apart. I am going to make a warning post. I sent them to apex and they said they saw no issue with them.

Yeah mine where definitely more then 3, loose, tight, super loose, super tight, it was all over the place. Sad to say money was wasted on those.

 

[tdstuart]

Yeah mine where definitely more then 3, loose, tight, super loose, super tight, it was all over the place. Sad to say money was wasted on those.

When did you get yours? I got mine in early October 2022.

Mine were the same, several loose, several hand tight, several torqued lightly, and some seemed to be at torque spec. I put 5k miles on the engine and I'm sure in another 5k the engine would have done the same as yours.

 

[Mad1186]

When did you get yours? I got mine in early October 2022.

Mine were the same, several loose, several hand tight, several torqued lightly, and some seemed to be at torque spec. I put 5k miles on the engine and I'm sure in another 5k the engine would have done the same as yours.

Yeah once my car overheated and blew a head gasket, i tore it down immediately because it just didn’t seem possible that with everything new on my build and 8k miles i blow a headgasket?! Not possible until i saw it was the headstuds that were the failure.

 

[tdstuart]

Yeah once my car overheated and blew a head gasket, i tore it down immediately because it just didn’t seem possible that with everything new on my build and 8k miles i blow a headgasket?! Not possible until i saw it was the headstuds that were the failure.

Yep I am "lucky" my bearings spun and I found it before I blew a head gasket haha.

 

[inspecto]

Godspeed my man, ya got more patience than me.

 

[SolarFlare]

What’s apex got to say about this?

 

[tdstuart]

Any updates?

 

[Johnny Rockit]

What’s apex got to say about this?

I bet they keep quiet or the lawsuits will destroy them. Are the factory studs junk?

 

[ice445]

I bet they keep quiet or the lawsuits will destroy them. Are the factory studs junk?

No, the factory bolts are really quite good. It's just that when you're using gen 2 heads with a gen 3 block, you can't use them.

 

[Mad1186]

So update! Car has been running good, just installed a new clutch so i had to baby it for a while. I ordered ARP studs and put them in with a new head gasket, NGK spark plugs, MMR cooling mod since the block is already out again, radium coolant reservoir, and PP1 radiator.

I also got the heads and block checked, all was good. But weird thing is, is that the car sounds a little deeper now for some reason, I’m not sure if the mufflers were damaged from the coolant and oil mixture in the exhaust gases but it’s kinda throwing me off. Sounds more throaty on pulls, compression is good and no leaks, no check engine light so I’m kinda wondering why it sounds different. So far i emailed APEX Torque and no reply sadly, i might make a call because it kinda ridiculous that i spent money on these headstuds and they failed.

 

[Mad1186]

What’s apex got to say about this?

They haven’t emailed me back. Smh

 

[tdstuart]

They haven’t emailed me back. Smh

They didn't email me back either I had to go through beefcakeracing (the place I purchased the studs from) before they started responding to my emails.

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