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 Post subject: Necessary to Change Headbolts
PostPosted: Sun Aug 22, 2010 9:15 am 
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Getting close to putting head back on 96 2.0 sohc. Head never overheated. Can I use old head bolts? Or should I spend yet another $40 for new ones? Car only has 100K on it and is just a beat around car.


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 Post subject: Re: Necessary to Change Headbolts
PostPosted: Sun Aug 22, 2010 9:18 am 
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Its recommended, id change em

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 Post subject: Re: Necessary to Change Headbolts
PostPosted: Sun Aug 22, 2010 10:22 am 
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You will get mixed opinions on this subject. I reused mine last year, about 15,000 miles ago with no problems, I didn't know it was recommended to change them. I have read other posts where people say they will reuse them once then buy new ones after that. A lot of people say replace them, no if's and's or but's. FSM does state it is recommended that they are replaced when removed. You just have to decide if saving $40 is worth the risk of having to redo everything if it leaks or the trouble of removing one if it should happen to break when installing. I have a magnum head to put on my car soon and I purchased new ones this time, and I will again next time. I am sure they didn't put that in the FSM just to be dicks and make us buy new ones every time.

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 Post subject: Re: Necessary to Change Headbolts
PostPosted: Sun Aug 22, 2010 11:25 am 
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Jamie Ely wrote:
You will get mixed opinions on this subject. I reused mine last year, about 15,000 miles ago with no problems, I didn't know it was recommended to change them. I have read other posts where people say they will reuse them once then buy new ones after that. A lot of people say replace them, no if's and's or but's. FSM does state it is recommended that they are replaced when removed. You just have to decide if saving $40 is worth the risk of having to redo everything if it leaks or the trouble of removing one if it should happen to break when installing. I have a magnum head to put on my car soon and I purchased new ones this time, and I will again next time. I am sure they didn't put that in the FSM just to be dicks and make us buy new ones every time.


Jamie makes some good points.

I probably wouldn't re-use them more than twice.


It *may* be possible to re-use old head bolts, BUT you will want to carefully check them for Thread DISTORTION and bolt STRETCH.
If you don't have a way to check these, replace them regardless.

I will rule out re-using head bolts from an engine that has been overheated, or has had knock / detonation problems.


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 Post subject: Re: Necessary to Change Headbolts
PostPosted: Sun Aug 22, 2010 11:36 am 
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After Chrysler went to the 11mm bolt in '85 or '86, the stretch problems stopped.
They did re-issue better 10mm bolts, don't recall how they worked- do recall drilling the older 2.2 blocks to 11mm.


You don't need any equipment to check the bolts;

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Razor blade, etc

They won't have problems, tho- I don't even look anymore

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 Post subject: Re: Necessary to Change Headbolts
PostPosted: Sun Aug 22, 2010 12:14 pm 
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new ones are 25$. get them for insurance

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 Post subject: Re: Necessary to Change Headbolts
PostPosted: Sun Aug 22, 2010 12:16 pm 
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$25 ??????????????????????????????????????????????
You know how much beer that is???

You're sick! :lol:

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 Post subject: Re: Necessary to Change Headbolts
PostPosted: Sun Aug 22, 2010 12:24 pm 
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$25 in beer money is better spent on beer for me too.

I reuse mine all the time on 2.0 and 2.4. With more than 12.5:1 comp and 250+psi cranking pressure I still reuse them. I check them every time, for sure. I have yet to see a bad one come out of any of my blocks. I don't exactly follow the torque setting either, mine would be more prone to stretch/distortion. I put mine a little tighter than the norm. In more than 10 years of doing this I have bought exactly one set of new head bolts. And I've reused that set 3 times that I can think of right now.

For those that throw them away every time, it's insurance I guess. It's your money, toss it away if you feel the need. Service manuals aren't always right 100% of the time. Prime example proven wrong years ago would be that you have to pull the head to swap a SOHC cam with engine still in the car.

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 Post subject: Re: Necessary to Change Headbolts
PostPosted: Sun Aug 22, 2010 12:35 pm 
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How do you know the new ones are good?

The old ones are proven. :^)

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 Post subject: Re: Necessary to Change Headbolts
PostPosted: Sun Aug 22, 2010 3:11 pm 
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If you can find SOHC head bolts for $25 thats a deal. They are usually around $30-$35 a set around here at autozone, advance or o'reilly.

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