It looks like I am leaking antifreeze at the first head bolt on the right side head. Does the head bolt go into the water jacket? It is a 1963, 327 cubic inch, 250 horse power, base engine? Thanks.
Do the head bolts go into the water jacket on a 63, 327, 250 hp?
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Re: Do the head bolts go into the water jacket on a 63, 327, 250 hp?
Yes. All of them do.- Top
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Re: Do the head bolts go into the water jacket on a 63, 327, 250 hp?
Remove the bolt, scrupulously clean the threads in the block and on the bolt, apply sealer to the bolt, re-install the bolt and torque to specs. Loctite Pipe Thread Sealer with Teflon is a good sealer to use for this application.In Appreciation of John Hinckley- Top
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Re: Do the head bolts go into the water jacket on a 63, 327, 250 hp?
Terry- Top
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Re: Do the head bolts go into the water jacket on a 63, 327, 250 hp?
Is this Loctite sealer a non-setting Teflon paste?
Loaded question.
I tried using a non-setting Teflon paste to seal head bolts once and it didn't work. From the amount of coolant I found under the valvecover, it must have looked like a Rain Bird under there with the engine running.
I went back to tried and proven Permatex #2.
Jim- Top
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Re: Do the head bolts go into the water jacket on a 63, 327, 250 hp?
Ain't a gonna make Florida Joey, business comes firstest.
Dick Whittington- Top
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Re: Do the head bolts go into the water jacket on a 63, 327, 250 hp?
But if Dick recommends it, you know it is good.
Larry- Top
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Re: Do the head bolts go into the water jacket on a 63, 327, 250 hp?
The choice of thread sealant will change the torque value that should be used for your head bolts. When using a paste with Teflon, one should use the torque value that is specified for molybdenum lube, and a dab of moly grease should be placed under the head bolts (and washers, if used) after applying sealant to the threads. If using shellac based sealant, like Permatex/Indian Head/etc., then you should oil the underside of the bolt head (and washer, if used), and use the torque setting specified for lubricating the bolts with motor oil. The moly value is always about 10% lower than the motor oil value.
I like the 12346004 - GM Teflon Pipe & Thread Sealant better than the Permatex stuff. It's much more expensive, but it takes much longer to skin over, and remains soft over time whereas the Permatex gets semi-hard and gums up the threads.- Top
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Re: Do the head bolts go into the water jacket on a 63, 327, 250 hp?
All-----
Many current GM SERVICE head bolts for Gen I and Gen II small blocks have what appears to be a teflon-based sealer pre-applied to the bolt threadsIn Appreciation of John Hinckley- Top
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Re: Do the head bolts go into the water jacket on a 63, 327, 250 hp?
I've seen pre-applied white sealer (probably teflon) and pre-applied blue sealer (Loctite ?) on the bolts supplied with the last two non GM water pumps I installed. These were not for Corvettes.- Top
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Re: Do the head bolts go into the water jacket on a 63, 327, 250 hp?
The choice of thread sealant will change the torque value that should be used for your head bolts. When using a paste with Teflon, one should use the torque value that is specified for molybdenum lube, and a dab of moly grease should be placed under the head bolts (and washers, if used) after applying sealant to the threads. If using shellac based sealant, like Permatex/Indian Head/etc., then you should oil the underside of the bolt head (and washer, if used), and use the torque setting specified for lubricating the bolts with motor oil. The moly value is always about 10% lower than the motor oil value.
I like the 12346004 - GM Teflon Pipe & Thread Sealant better than the Permatex stuff. It's much more expensive, but it takes much longer to skin over, and remains soft over time whereas the Permatex gets semi-hard and gums up the threads.Dick Whittington- Top
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Re: Do the head bolts go into the water jacket on a 63, 327, 250 hp?
Doesn't matter who packages it. I've used both and they ain't the same stuff. They dry different, act different and even smell different.- Top
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Re: Do the head bolts go into the water jacket on a 63, 327, 250 hp?
The choice of thread sealant will change the torque value that should be used for your head bolts. When using a paste with Teflon, one should use the torque value that is specified for molybdenum lube, and a dab of moly grease should be placed under the head bolts (and washers, if used) after applying sealant to the threads. If using shellac based sealant, like Permatex/Indian Head/etc., then you should oil the underside of the bolt head (and washer, if used), and use the torque setting specified for lubricating the bolts with motor oil. The moly value is always about 10% lower than the motor oil value.
I like the 12346004 - GM Teflon Pipe & Thread Sealant better than the Permatex stuff. It's much more expensive, but it takes much longer to skin over, and remains soft over time whereas the Permatex gets semi-hard and gums up the threads.- Top
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