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2008-10-03 05:51:11 (13 weeks 5 days 20 hours 4 minutes 48 seconds) #1881367 | | view posts since this          #1 

tn65

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Help with Head Bolts

Im going to be pulling the head some time soon (i think its a bhg).
I got my hands on some brand new head bolts from the dealership and had some questions about the installation procedure in the FSM.

There are 4 steps and a "phase" in the process.
Im I am not mistaken the first four steps are:
- tighten 72 ft.lbs.
- loosen to 0 ft. lbs.
- tighten to 26-32 ft. lbs.
- 75 degrees clockwise

Here is where I am confused...
"phase 5" says 75 degrees clockwise again?

Can someone help please?


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2008-10-03 16:11:34 (13 weeks 5 days 9 hours 44 minutes 25 seconds) #1881882 | | view posts since this          #2 

tn65

Trace

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Re: Help with Head Bolts

o ok...
so i do tighten the bolts down a second 75 degrees for that "phase 5" or whatever.  thanks for the heads up and the tips.  definitely got to go grab an angle wrench.

does anyone know why they dont just call it "step 5" and call it a "phase 5"?


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2008-10-03 18:48:46 (13 weeks 5 days 7 hours 7 minutes 13 seconds) #1882052 | | view posts since this          #3 

Marcatarkon

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Re: Help with Head Bolts

Also, try to get your hands on an angle wrench. Eyeballing is unacceptable. If you can't find an angle wrench, get a protractor and measure the angle of the socket sitting firmly in the bolt head. Two people isn't a must, but it's a great idea.

My mechanic buddy that did the work got stumped on this part.  I ended up cutting a hole in a paper plate to slide over the socket extension.  I was able to use a protractor and make the appropriate markings for him.  It worked well, and the head was fine until the motor spun a bearing 1K miles later.

I'd suggest a blackstone labs oil analysis to determine the health of the motor first.  This would have saved me from doing the HG, and just replace the whole motor, which I ended up doing anyway.


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2008-10-03 18:54:13 (13 weeks 5 days 7 hours 1 minute 46 seconds) #1882056 | | view posts since this          #4 

boogerboy72

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Re: Help with Head Bolts

dude, just eyeball it. mark a corner of the nut, go from there. ive never used one of those stupid ass gauges on the countless heads ive replaced on god knows how many cars.

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2008-10-03 18:57:30 (13 weeks 5 days 6 hours 58 minutes 29 seconds) #1882061 | | view posts since this          #5 

SpecHuy

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Re: Help with Head Bolts

you can eyeball it or use the torque angle gauge.. either or works. I used the angle gauge to be safe.


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2008-10-04 02:19:09 (13 weeks 4 days 23 hours 36 minutes 50 seconds) #1882466 | | view posts since this          #6 

tn65

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Re: Help with Head Bolts

pimpsmurf wrote:

I used a protractor. It's like a $1 angle gauge that you have to have a brain to use. haha

Eyeballing might work fine, but why risk it when you can hit walmart for a $1 protractor? smiley-smile

-JNY

haha... thanks for the input.


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2008-10-28 09:50:26 (10 weeks 1 day 16 hours 5 minutes 33 seconds) #1906505 | | view posts since this          #7 

Obsidian

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Re: Help with Head Bolts

boogerboy72 wrote:

dude, just eyeball it. mark a corner of the nut, go from there. ive never used one of those stupid ass gauges on the countless heads ive replaced on god knows how many cars.

You should definatley NOT tell this to all the freakin idiots driving cars these days. Good mechanics would know what the hell to do and about where to stop, other people......


definatley bad.... bad bad idea..... lol.


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2008-10-28 10:18:15 (10 weeks 1 day 15 hours 37 minutes 44 seconds) #1906520 | | view posts since this          #8 

darsondriss

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Re: Help with Head Bolts

just to have this stated for people that might happen upon this topic.

1.  if you have some time, DONT REUSE THE HEADBOLTS.

2. if you have to have it done, when you get the bolts tqed down, check there torque and if its much above 100 like 120 130 140 etc.
DONT REUSE THE HEADBOLTS

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