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Old 08-06-2014, 12:30 AM   #1
torcity
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Overtightened Head Bolts!

So I just got this Focus, and have been trying to get it up to par for a safety and etest. I replaced the exhaust flex pipe, and muffler, fixed the high idle (IACV cleaning), and then realized that the head gasket was blown... Lots of coolant in the exhaust.

I got the felpro gasket set, and head bolts, and started tearing her down. When I put the new gasket on and started bolting up the head, I had a mental lapse. The procedure is:

1 - Hand tight
2 - 132 in-lb
3 - 30 ft-lb
4 - 90 degrees

Well I decided to turn them 180 degrees instead, took some effort, and a meter long breaker bar. When I was done about half of them, I realized what I did, but didn't want to undo them, as the gasket was already compressed, so in the interest of even distribution, I did the rest of them to 180 degrees as well. None broke, and none of them seemed to give away, but I am very concerned that I may have one break once the engine heat cycles.

Would like to hear what others have to say, I'm hoping it just stretched the bolts a little more, and won't cause any problems, but I have never done this before (over tightened), and ideally would like to hear from somebody that has, and hasn't had problems lol.

I am not finished putting her back together, but should be tomorrow, so I haven't been able to start her yet.


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Old 08-06-2014, 12:39 AM   #2
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If I read correctly, new head bolts? Just go with it and get it running. it should be fine, though I suspect it may be somewhere around 200 ftlbs at 180 degrees?

only one way to know for sure, but I think you'll be alright.
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Old 08-06-2014, 01:38 AM   #3
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Really only two options, try it as is or do the gasket/bolts over again.

If one had given way, the answer would be obvious & doing it again would be the only option.

Luck
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Old 08-06-2014, 09:47 PM   #4
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Thanks for the advice fellas, I should have gotten her running today, but had a few distractions, and am working outside, so I had to cut it off an hour or two away from finishing once the sun went down. Will get her going tomorrow and report back. Thinking/hoping/praying all is well lol.

Checked the new bolts today with my torque wrench, and they seem to be at about 70 - 80 ft-lb's, so not as bad as I thought, but not great either, as technically the max torque for an m10 10.9 is 55ft-lb according to a couple sources.

Ran into another great problem today, turns out that my passenger side motor mount has had the threads stripped out of them in one of the studs (aluminum mid cover). Still about a cm of thread left at the bottom, but the top 2cm is pretty much gone. Not sure what I'm going to do, debating between JB Welding that MFer, or helicoiling it. If I JB Weld it I better do it tonight to finish by tomorrow, and worse case scenario I helicoil it later, but at the same time I usually like to do things right instead of twice, so we'll see.

*Update*

Decided to JB-Weld it... Now I kind of regret it lol. I don't usually take shortcuts, and that is one hell of a red neck repair if I've ever heard of one. I'll take a look at it in the morning and will most likely helicoil it, only problem is getting a coil that is long enough, it's a about a 2.5cm hole, and the coils I can get at canadian tire are only 1cm. The other option is just leaving it for a short time, and grab another mount from my local junkyard. I'll figure it out in the morning I guess...

Last edited by torcity; 08-06-2014 at 11:05 PM. Reason: Updated
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Old 08-06-2014, 11:45 PM   #5
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Use two of the short helicoils, you'll be breaking the center out of them anyways....

Run one down most of the way then run a second down to below the top surface.
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Old 08-07-2014, 02:25 PM   #6
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Just buy a new plate. IIRC they are around $35 from Ford.
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Old 08-08-2014, 09:54 AM   #7
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Great idea Sailor, should have thought of that lol. I checked it out, and it seemed surprisingly sturdy, so I just left it, and will get another plate in the near future, still have to do swaybar links and control arms, so I don't want to spend all my money right away. Didn't realize it would be so reasonable.

I started her up last night, and she fired up right away. There was plenty of smoke in the exhaust and a bit of water, so I was praying it was just left over, and not a cracked head. Sure enough it cleared up once it ran for a bit. I took a boot down the street (no plates yet) and she ran nicely, however I thought she'd have a bit more pep than she does, a bit dissapointed in the low end power, but she does go pretty good. I'm used to my 91 ford ranger 3.0 v6, and I shift at like 2200, drives like a diesel. This I will probably shift at about 2800-3200.

Really scary though cause she will not go in a straight line lol, the ball joints are totally shot. Going to get to those today!
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Old 08-08-2014, 11:41 AM   #8
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A tune may help a lot of your issues

Tom
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