ARP Head Bolt Washers
Thread Starter
Joined: Oct 2007
Posts: 446
Likes: 1
From: Oakland, California
ARP Head Bolt Washers So I dropped the heads on my LQ4 last night, and didn't realize until this morning that I forgot about the washer being installed a certain way.
I haven't started the engine or anything, so I was thinking about taking out the head bolts one by one and checking.
What do you guys suggest?
Is this something to be seriously worried about?
Thank in advance.
I haven't started the engine or anything, so I was thinking about taking out the head bolts one by one and checking.
What do you guys suggest?
Is this something to be seriously worried about?
Thank in advance.
TECH Resident
Joined: Feb 2007
Posts: 831
Likes: 0
From: Boston, MA
I'd probably pull them all and reinstall them.... But then again I'm the paranoid type.
I doubt they will have any issues, but for ARP to say in the instructions that installing them incorrectly could cause the bolt to fail would worry me.
In my mind: why risk having to drill out a hardened bolt from the block if the chamfered edge somehow causes the bolt to shear?
For 30 minutes worth of work, I'd double check them.
I doubt they will have any issues, but for ARP to say in the instructions that installing them incorrectly could cause the bolt to fail would worry me.
In my mind: why risk having to drill out a hardened bolt from the block if the chamfered edge somehow causes the bolt to shear?
For 30 minutes worth of work, I'd double check them.
The chamfer is there for a reason. If you install with the chamfer facing down, the bolt will loosen as the radius under the bolt head works against the flat, non-chamfered edge of the washer...
Thread Starter
Joined: Oct 2007
Posts: 446
Likes: 1
From: Oakland, California
I'm just going to go ahead and reinstall them. Do you guys think I can reuse the head gaskets? They are MLS LS9 head gaskets, and the engine hasn't been started.
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Thread Starter
Joined: Oct 2007
Posts: 446
Likes: 1
From: Oakland, California
Just a quick update. I went ahead and contacted ARP about this issue. They told me to take them out one at a time and check them. It turns out that only about five were installed correctly. I don't know what I was thinking.
Thank you to all of the folks who provides their valuable feedback and suggestions!
Thank you to all of the folks who provides their valuable feedback and suggestions!
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Just a quick update. I went ahead and contacted ARP about this issue. They told me to take them out one at a time and check them. It turns out that only about five were installed correctly. I don't know what I was thinking.
Thank you to all of the folks who provides their valuable feedback and suggestions!
Thank you to all of the folks who provides their valuable feedback and suggestions!