Head bolt, replace or not - Nissan Xterra Forum
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#1 Old 11-24-2012, 09:23 PM
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Head bolt, replace or not

Hey guys,
I just did an oil change today and my oil was like a milkshake (coolant in it) so i'm planning on doing a cylinder head overhaul and was wondering if i can re-use the cylinder head bolts?
thanks guys
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#2 Old 11-24-2012, 09:35 PM
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usually head bolts have a thread that kind of stretches a bit when installed. they are installed under a pretty insane torque setting and you run a risk of stripping one out if you reuse them. thats not to say that if you did use them you would have trouble, but I personally wouldnt risk it.

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#3 Old 11-24-2012, 11:00 PM
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Torque to Yield.
You may get lucky with one re-use.
By "may" I mean won't.

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#4 Old 11-25-2012, 08:51 AM
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Head bolts are not reusable. You must buy new ones.
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#5 Old 11-25-2012, 10:46 AM
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I will do a leak down test today just to validate, the oil was still good except for like 15% of it which was brownish milkshake color. Does it mean i'm still in the early phase, should i replace it right away?
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#6 Old 11-25-2012, 11:17 AM
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Replace your oil ASAP. You don't want to be running "dirty" oil through that motor. You are reducing the life every second its running with that oil in it.
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#7 Old 11-27-2012, 07:53 AM
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compression test was 175 across the board, can it still be a bad headgasket with such numbers???
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#8 Old 11-27-2012, 08:25 AM
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Are you loosing coolant?
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#9 Old 11-27-2012, 08:34 AM
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i add half a liter a month ago, but i dont know if it was allready missing

check my other thread for all the details
http://www.clubxterra.org/forums/showthread.php?t=40048

Last edited by gogogsr; 11-27-2012 at 08:40 AM. Reason: more info
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#10 Old 11-27-2012, 02:42 PM
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It may not be leaking in the cumbustion chambers, but if it looked like milkshake, antifreeze is getting into the lower end. This can come from many areas, including a cracked or warped head, failed head gasket or rot through the waterjacket. (often the heads)
Don't run it with the milkshake, it will trash the rod and main bearings.

Never reuse head bolts! ever!!!

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Last edited by Itsme; 11-27-2012 at 02:44 PM.
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