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I'm replacing the head gasket of a 1993.

Tiny
ANONYMOUS
  • MEMBER
  • 1993 NISSAN MAXIMA
  • 183,000 MILES
Hi, I'm replacing the head gasket of a 1993 Nissan Maxima and the mechanic book says that I have to replace the head bolts. I was wondering if it's really necessary or not. Thank you for the eventually answer.
Monday, February 4th, 2013 AT 2:15 AM

2 Replies

Tiny
CARADIODOC
  • MECHANIC
  • 33,873 POSTS
Yes. Many engines use "torque-to-yield" bolts that are a one-time-use bolt. They physically stretch when installed to help hold the cylinder head clamped tightly in place. Used head bolts will not hold sufficient tension on the head.
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Monday, February 4th, 2013 AT 2:20 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Good practice but not necessary-unless its stretched-
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Monday, February 4th, 2013 AT 2:23 AM

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