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  • April 23, 2024, 07:50:50 PM

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Author Topic: Head bolts for the 4.0  (Read 875 times)

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Offline maddog

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Head bolts for the 4.0
« on: June 20, 2023, 06:45:02 PM »
So I finally got my engine block and everything else back from the machine shop (they've only had it since September of 2020). I noticed one of the things I didn't get with it is head bolts, but I've also noticed that the ARP ones don't have the studs for the fuel rail or a few other things on top of the bolts. So I was wondering if anyone knows of a good source for head bolts that match the original ones but are stronger than the original ones, because the engine is being built as a stroker motor that's been bored 30 over.
1998 CHEVY S10 (DAILY DRIVER/PROJECT) INTIMIDATIN'
1980 AMC EAGLE WAGON (PROJECT) EAGLE EYES
http://forums.amceaglesden.com/index.php?topic=30758.0
1983 AMC EAGLE LIMITED WAGON-SURVIVOR (gone)
http://forums.amceaglesden.com/index.php?topic=32372.0

Offline rmick

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Re: Head bolts for the 4.0
« Reply #1 on: June 20, 2023, 10:52:04 PM »
I used some felpro bolts  I baught at  auatozone on my stroker.
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Offline amcfool1

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Re: Head bolts for the 4.0
« Reply #2 on: June 20, 2023, 11:40:05 PM »
hi, check out      headbolts.com    good luck,  gz

Offline maddog

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Re: Head bolts for the 4.0
« Reply #3 on: June 21, 2023, 01:04:22 AM »
Thank you guys. rmick I've seen a lot of bad reviews from fairly recent for the felpro ones. And I'll check out that website gz.
1998 CHEVY S10 (DAILY DRIVER/PROJECT) INTIMIDATIN'
1980 AMC EAGLE WAGON (PROJECT) EAGLE EYES
http://forums.amceaglesden.com/index.php?topic=30758.0
1983 AMC EAGLE LIMITED WAGON-SURVIVOR (gone)
http://forums.amceaglesden.com/index.php?topic=32372.0

Offline maddog

  • a long haired redneck country boy
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  • Thumbs Up 45
  • AMC Eagle the original crossover
Re: Head bolts for the 4.0
« Reply #4 on: June 21, 2023, 11:45:00 PM »
So I've been looking and I can only find head bolts for 97+ engines and mine is a 91. Would those actually work on my engine or is there a different thread pattern or something with the later model ones? Even the parts stores said they can't get them for my engine.
1998 CHEVY S10 (DAILY DRIVER/PROJECT) INTIMIDATIN'
1980 AMC EAGLE WAGON (PROJECT) EAGLE EYES
http://forums.amceaglesden.com/index.php?topic=30758.0
1983 AMC EAGLE LIMITED WAGON-SURVIVOR (gone)
http://forums.amceaglesden.com/index.php?topic=32372.0

Offline maddog

  • a long haired redneck country boy
  • AMC Eagles Den Addicted
  • ********
  • Posts: 1805
  • Thumbs Up 45
  • AMC Eagle the original crossover
Re: Head bolts for the 4.0
« Reply #5 on: June 24, 2023, 04:38:31 PM »
So after doing some research I have found that the arp bolts are the same part number for 86 through 96 as they are for 97 through 06. The only real difference I can find between the ones that I took off of my engine and the ones from felpro for the newer model engines is that the head of the bolts is a 12-point head on the new ones and a regular hex head on the old ones with the 12 point heads having a stem above two of the heads for lining up the valve cover gasket.
1998 CHEVY S10 (DAILY DRIVER/PROJECT) INTIMIDATIN'
1980 AMC EAGLE WAGON (PROJECT) EAGLE EYES
http://forums.amceaglesden.com/index.php?topic=30758.0
1983 AMC EAGLE LIMITED WAGON-SURVIVOR (gone)
http://forums.amceaglesden.com/index.php?topic=32372.0

 

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