Coolant leaking from header bolt
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Coolant leaking from header bolt
Just like it states in the title, I have coolant leaking from the front header bolt on the drivers side of the motor. Anybody else ever had this happen? I think its must have been over torqued at one point! I locktited it back in well see what happens!
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From: Pa
It sounds like someone might have drilled out a broken stud and drilled too far. Coolant should never come out the manifold bolt holes.
Loctite will seal it temporaily however the heat will eventually break down the locktite. You could try screwing in a small stainless steel M8X1.25mm set screw about 3/16" long into the head (Bottom it out) with some rtv ultra copper sealant and then put the stud back in. The set-screw will act as a plug and not solely rely on the stud to prevent a leak.
Loctite will seal it temporaily however the heat will eventually break down the locktite. You could try screwing in a small stainless steel M8X1.25mm set screw about 3/16" long into the head (Bottom it out) with some rtv ultra copper sealant and then put the stud back in. The set-screw will act as a plug and not solely rely on the stud to prevent a leak.
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Originally Posted by dkf
It sounds like someone might have drilled out a broken stud and drilled too far. Coolant should never come out the manifold bolt holes.
Loctite will seal it temporaily however the heat will eventually break down the locktite. You could try screwing in a small stainless steel M8X1.25mm set screw about 3/16" long into the head (Bottom it out) with some rtv ultra copper sealant and then put the stud back in. The set-screw will act as a plug and not solely rely on the stud to prevent a leak.
Loctite will seal it temporaily however the heat will eventually break down the locktite. You could try screwing in a small stainless steel M8X1.25mm set screw about 3/16" long into the head (Bottom it out) with some rtv ultra copper sealant and then put the stud back in. The set-screw will act as a plug and not solely rely on the stud to prevent a leak.
I Think I will try the set screw, if I can find one!
Thanks for your input, Lug
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From: Pa
Originally Posted by lugnutt
I actually thought about doing that, but I wasnt sure I would have room to put the bolt back in. Also, I just wanted to see it anyone else had seen this before. I actually removed the bolt and noticed that it was only had about 4 to 5 threads engaged into the head.
I Think I will try the set screw, if I can find one!
Thanks for your input, Lug
I Think I will try the set screw, if I can find one!
Thanks for your input, Lug
It is possible that someone put in a helicoil and used a short helicoil which is only about 3/8" or so long. You should run an M8X1.25mm Bottoming tap into the head to clean up the threads before installing the set screw.
Heres a link to a company where I often buy hardware, they have almost anything.
http://www.mcmaster.com/
<TABLE class=FullWidthBorder cellSpacing=0 cellPadding=0 border=0><TBODY><TR><TD class=PartNbr>Part # 92605A139</TD></TR><TR><TD align=left><TABLE class=FullWidthBorder cellSpacing=5 cellPadding=0 border=0><TBODY><TR><TD class=PartNbrDesc>Metric 18-8 SS Flat Point Socket Set Screw M8 Size, 8mm Length, 1.25mm Pitch</TD></TR><TR><TD class=PriceInfo align=left>In stock at $8.65 per Pack</TD></TR><TR><TD class=PartNbrDesc align=left>This product is sold in Packs of 25</TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE>
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Cool, thanks for all the help guys. I ordered the set screws from mcmaster carr, along with a blind tap. It is acutally a relief to find this, every since I got the truck Ive smelled a coolant leak and couldnt find it. It never really used any coolant though.
Ill let you know how it works out.
Lug
Ill let you know how it works out.
Lug
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From: Pa
Originally Posted by krewat
The stud in my hand from my '01 is more like 7/8" of threads before the shoulder.
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From: Pa
Originally Posted by krewat
Weird, mine have 7/8" of thread below the shoulder, and above the shoulder. Not including the hex, of course.
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Well, heres how it played out. The tap would not go deeper that 1/2 inch. I am assuming there is a broken bolt in the hole. I installed a stud with loctite bolt sealer and torqued it down. Then installed a nut and torqued it. So far so good, no leaks!
If it starts then the head will have to come off!
If it starts then the head will have to come off!
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