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#77757 05/19/2007 1:38 AM | Joined: Mar 2007 Posts: 27 Apprentice | | Apprentice Joined: Mar 2007 Posts: 27 | I have just replaced the head on a 292. Everything good except there is a drizzle of coolant oozing out at one of the head bolt caps. Why does this occur and what do I do to fix it? | | |
#77758 05/19/2007 1:41 AM | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | If it's not a blind tapped hole, did you put the proper sealant on it? That would be the most likely cause.
Bill Burmeister
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#77759 05/19/2007 1:48 AM | Joined: Mar 2007 Posts: 27 Apprentice | | Apprentice Joined: Mar 2007 Posts: 27 | I do not know if the hole is blind, but I have to admit I did not use thread sealer. I have some Indian Head sealer on hand. Would that work? | | |
#77760 05/19/2007 2:27 AM | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | The manuals suggest Permatex #2 sealer. That's what I use. You might check the bottle on the Indian head, it should say if it can be used on threads as a sealer.
Bill Burmeister
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#77761 05/19/2007 3:20 AM | Joined: Mar 2004 Posts: 3,068 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 3,068 | Now that it's "wet" with anti-freeze, you'll either have to drain it and dry out the hole with brake cleaner and compressed air or use a teflon tape or maybe pipe dope to seal it now,
Scott | | |
#77762 05/19/2007 12:13 PM | Joined: May 2005 Posts: 1,624 Shop Shark | | Shop Shark Joined: May 2005 Posts: 1,624 | What is the location of the head bolt?
Six volt guy living in a twelve volt world
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#77763 05/19/2007 8:27 PM | Joined: Mar 2007 Posts: 27 Apprentice | | Apprentice Joined: Mar 2007 Posts: 27 | Leaking bolt is on driver side, in between # 4 and 5 exhaust valves.
I was thinking I should de-torque the head and remove all the bolts to add a thread sealer. It's just one leaking now, but this could happen with others, right? | | |
#77764 05/19/2007 8:52 PM | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | All the bolt holes on the left side are wet. You will need to drain the block & clean the holes like Big trucks says. I would use high temp RTV. Give it an hour or 2 to set up before you put the coolant in.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | |
#77765 05/19/2007 8:59 PM | Joined: Mar 2007 Posts: 27 Apprentice | | Apprentice Joined: Mar 2007 Posts: 27 | OK, will do. Is there any chance this is due to some sort of head crack allowing water into the bolt shaft or is it pretty likely this is due to I did not use thread sealer? | | |
#77766 05/19/2007 9:01 PM | Joined: Feb 2004 Posts: 28,674 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 28,674 | If you can find a source for it, Permatex Super 300 brush-on gasket sealer would be an excellent choice. It's a little scarce, but it's much better than the standard #3 Permatex liquid. If you remove the head bolts one at a time, and re-torque them after applying the sealer, you shouldn't have to risk upsetting the head gasket seal. A 20 gauge shotgun brass brush and a little spray brake cleaner would be a good way to clean/dry the block threads before applying the sealer to the bolts. Drain the coolant to below the level of the top of the block, of course.
Jerry
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