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Valve cover bolt

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Old 13 Apr 2013, 02:05 pm
swanjack's Avatar
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Join Date: Jan 2011
Location: Miskin, Wales, UK.
Posts: 83
Default Valve cover bolt

So I went to change my sparkplugs today and found number one and three spark plug threads to be covered in oil. As the electrodes were clean, I assumed that the valve cover gasket (I've suspected a leak there for a while) and the spark plug tube gaskets were to blame. So I decided to take off the valve cover to see what was going on. All but one of the bolts came out without problem, but the remaining one was a bit stiff but nothing of note and when unscrewing it, it sheared, leaving a half inch of broken bolt protruding from the cylinder head

Once I get the remaining bit of bolt out of the head (that's another story), I'll need a new one. But over here in the UK, I've priced up a bolt at the equivalent of $30 , whereas in the US their around $8.

I've established that the bolt is an M6 1.0 6g type, which I think is nothing special. What I'm thinking is if I take the rubber grommet and sleeve off the broken bolt, can I just put these over a normal M6 1.0 bolt ($1) and avoid having to buy one off the dealer? Obviously the new bolt will have to be the same length, or shorter that the old one. Would this be acceptable?

What was intended to be a quick service has turned into a PITA, especially as I dropped a socket down the lower intake manifold, which meant I had to take that off to retrieve it

Thanks for any help.

Last edited by swanjack; 13 Apr 2013 at 02:10 pm.
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Old 13 Apr 2013, 02:55 pm
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Default Re: Valve cover bolt

The valve cover tightening sequence is in three parts ending in 105 in-lbs. That's not a whole lot so if you get a bolt near enough to what was broken and you can tighten it down so it gets the gaskets tight enough so they won't leak, doing it your way should work. Just my opinion.
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