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New Head Bolts came with grease on them, are they okay to install?

Tiny
GOGETA40
  • MEMBER
  • 2007 FORD MUSTANG
  • 151,000 MILES
I received new head bolts, but they have grease on them. Are they okay to install in my cylinder heads and torque them? Or do I need to hit them with brake clean and then apply some engine oil to the threads?
Friday, February 16th, 2024 AT 6:20 PM

28 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,650 POSTS
Hi,

If they are new, chances are that is something the manufacturer used to lubricate the bolts and to help prevent corrosion from starting prior to use.

If you can, upload a picture of what they look like so I can see. However, I suspect they will be fine the way they are.

Let me know.

Joe
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Friday, February 16th, 2024 AT 6:59 PM
Tiny
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They are all like this.
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Friday, February 16th, 2024 AT 7:34 PM
Tiny
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Hi,

I believe that is a rust inhibitor. Certainly, you can clean them off and re-lubricate them with a thin coat or oil. That would be fine.

Let me know if you have other questions.

Take care,

Joe
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Friday, February 16th, 2024 AT 10:22 PM
Tiny
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I really appreciate it, Joe. That's what I figured. You rock.
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Saturday, February 17th, 2024 AT 5:32 AM
Tiny
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No problem whatsoever. Let me know if you need help with torque specs or sequence or anything other.

Take care,

Joe
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Saturday, February 17th, 2024 AT 6:31 PM
Tiny
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I believe it's 30 ft lbs and then an additional 90 degrees two times.
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Saturday, February 17th, 2024 AT 8:55 PM
Tiny
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Hi,

I'm not sure which engine you have. However, I attached the tightening sequence and torque specs (which are much lower than I expected) for the 4.0L V6.

If you have a different size engine, let me know.

Take care,

joe

See pics below.
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Saturday, February 17th, 2024 AT 10:47 PM
Tiny
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I have a 2007 Mustang GT 4.6 3V.
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Sunday, February 18th, 2024 AT 3:22 PM
Tiny
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Hi,

Yep, that makes a difference. I now know where you got the 30ft/lbs. LOL

I attached the directions below along with the torque sequence.

Let me know if this helps or if you need any other info.

Take care,

Joe

See pics below.
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Sunday, February 18th, 2024 AT 6:50 PM
Tiny
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Awesome. That's perfect. I'm also trying to find out the size of these exhaust manifold studs. I need new ones.
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Sunday, February 18th, 2024 AT 7:49 PM
Tiny
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Hi,

I'm sorry, but that isn't something the manual provides. Are you able to remove any of them? That's what I would do. Remove one and then you can determine the size by trying a few different ones.

Let me know.

Joe
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Monday, February 19th, 2024 AT 7:19 PM
Tiny
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I extracted them. I know they are not a M12. American muscle sold me bbk header kit. I don't have bbk headers. Lol. They said it would fit my stock heads. They were wrong.
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Monday, February 19th, 2024 AT 7:33 PM
Tiny
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Hi,

For some reason, I think they are an M10 x 1.5. That is where I can't remember for sure. They could be M10 x 1.25.

I found a replacement, Fel-Pro ES75105. Look that up and let me know if it helps.

Take care,

joe
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Monday, February 19th, 2024 AT 8:35 PM
Tiny
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You think this will work? It says it's for 2006 4.6. Mine is a 2007 4.6. But mine is also a GT. Not sure if that matters. The S197 I believe was made from 2005-2010.
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Tuesday, February 20th, 2024 AT 6:19 AM
Tiny
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Hi,

That is a very good question. I also found Dorman part 47713JC. It indicates up to 2006, but when I check fitment, it shows it works on a 2007 as well. Take a look at the pic below and compare it to what you have.

Let me know.

Joe

See pic below.
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Tuesday, February 20th, 2024 AT 7:25 PM
Tiny
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What I have doesn't have that kind of head. Just threaded on both ends. I believe the pic you sent me the other day should be correct. I went to AutoZone earlier and I purchased them. If they are not correct, I will get a refund and then try these out. I'm sure these and everything else are aftermarket since my car is old. I really do appreciate everything you have been helping me with.
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Tuesday, February 20th, 2024 AT 7:29 PM
Tiny
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Hi,

No problem whatsoever. I just hope I'm helping and not driving you crazy. LOL The information I'm finding is somewhat confusing and not specific.

Let me know if those work for you.

Take care,

Joe
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Tuesday, February 20th, 2024 AT 8:15 PM
Tiny
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You're not driving me crazy. My car has been down since 2019. That's usually how it goes with vehicles. Confusing, not specific, convoluted. Trust me, I take everyone's advice, including my own knowledge, manuals, videos and whatever I can use to help. Take care and I will let you know if the part I get is the correct one.
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Tuesday, February 20th, 2024 AT 8:25 PM
Tiny
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Does this matter? It's not flush. The bottom half has 7 threads on the new stud. My old has 10 threads.
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Wednesday, February 21st, 2024 AT 3:07 PM
Tiny
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Hi,

I would like to see it in further. I was always taught if the thread depth is at least 50% of the diameter, it is fine. It's hard for me to tell that in the pic, but do you feel it is at least that deep?

Joe
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Wednesday, February 21st, 2024 AT 6:50 PM

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