Posted: Wed Apr 30, 2008 3:40 pm Post subject: please help with head bolts thread sealer
hello,
i'm in proccess to do again my head gasket job.RIGHT this time.i'm wondering if i have to use thread sealing and what type to the head bolts.
in the f-head there is 15 bolts.except the under the carb,all the other are wet bolts.goes to the water jacket.
i will use a tap to clean the block threads and wire brush the bolts and a felpro headgasket.but have to use some type of sealer?
i've heard a lot of opinions.NO,permatex aviation,permatex high temp thread sealant.
I wouldn't call me the Guru but I have always used Permatex #1 and never had any problems. As I advised you, George, in your earlier post on this topic on the g503 site you have several options and I believe I listed all of them there. _________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
a guy from the jeepforum told me the following,and he scared me.i'm a bit confused.
Permatex will collect out of the threads at the top of the block, and help hold your head away from your block, something you do NOT want is anything holding the head away from the block!
Permatex is WAY too thick when it stands up, and will effect your re-torque.Even if the Permatex doesn't lift the head off the block far enough to leak right away, it's still a 'Wedge' in between the head and deck!
wes,sorry for asking again,but i want to do this one last time.i buyed tap to clean the threads,felpro gasket and don't know what to do with the sealer.
Apparently that was the only Permatex user on these web sites to have problems with Permatex #1. Since so many of us have had no problem with Permatex #1 I will assume he used too much. A thin coat on the threads of the bolt or stud only is all you need. When you removed your head did you find puddles of sealant wedged between your head and the block around the bolt holes?
You should not use a tap to clean threads. A tap will remove metal from the threads each time it is used. Either clean the threads with the appropriate chemical recommended by the sealant manufacturer or use a thread chaser designed which is designed for cleaning of threads only. _________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
Joined: Feb 16, 2007 Posts: 206 Location: Gold Coast Australia
Posted: Fri May 02, 2008 4:28 am Post subject:
I have always used GM thread sealer...probably even better products now (Ludel suggests teflon thread sealant which comes in a container)....just what one is used to, I guess. The little sealer which will accumulate around the block, gasket and head after fitting up is a good thing and will help in sealing the top of the threads.
Just remember head, gasket and block must be perfectly clean when assembled. _________________ John GIBBINS
ASE Master Medium/Heavy Truck & Auto Technician 2002 USA
Licensed Motor Mechanic NSW # MVIC 49593 Current
YOU CAN'T TROUBLESHOOT WHAT YOU DON'T UNDERSTAND
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