What Epoxy to use for closing throttle body idle hole?
03-05-2003, 02:46 PM
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What Epoxy to use for closing throttle body idle hole? I am tired of my car idleing at 1000+ when I am moving and only idleing at the programmed 850 when I am not moving. What type of epoxy do I need to use to close the original throttle body whole and drill another one without having to worry about the epoxy breaking off and going into my motor? Any suggestions are welcomed.
03-05-2003, 03:59 PM
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Re: What Epoxy to use for closing throttle body idle hole? Make that "real good with a TIG", since you
can't stand any warpage.
If you chamfer front and back so the epoxy
is physically "kept" then it will be more
reliable. Ditto if you let it be a little
proud to the surface, don't grind it flush.
If you had some lead, dead soft copper or
even soft aluminum, you could sort of "cold
rivet". But this would fully plug the hole
(as would epoxy).
Plugging and redrilling will make either of
these pretty weak.
Sometimes people suggest peening the metal
back into the hole, for minor mis-oversizing it
could do the trick for you. Take it in small
"bites" with a flat punch on a dead flat
piece of steel, mash the metal inward. Stop
every once in a while, reinstall and and see
if you like the diameter (idle speed) yet.
Hopefully you won't make a whistle.
Or, just buy a junkyard TB for its blade and
start over.
can't stand any warpage.
If you chamfer front and back so the epoxy
is physically "kept" then it will be more
reliable. Ditto if you let it be a little
proud to the surface, don't grind it flush.
If you had some lead, dead soft copper or
even soft aluminum, you could sort of "cold
rivet". But this would fully plug the hole
(as would epoxy).
Plugging and redrilling will make either of
these pretty weak.
Sometimes people suggest peening the metal
back into the hole, for minor mis-oversizing it
could do the trick for you. Take it in small
"bites" with a flat punch on a dead flat
piece of steel, mash the metal inward. Stop
every once in a while, reinstall and and see
if you like the diameter (idle speed) yet.
Hopefully you won't make a whistle.
Or, just buy a junkyard TB for its blade and
start over.
03-05-2003, 04:59 PM
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Re: What Epoxy to use for closing throttle body idle hole? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by jimmyblue:
<strong> Make that "real good with a TIG", since you
can't stand any warpage.
If you chamfer front and back so the epoxy
is physically "kept" then it will be more
reliable. Ditto if you let it be a little
proud to the surface, don't grind it flush.
If you had some lead, dead soft copper or
even soft aluminum, you could sort of "cold
rivet". But this would fully plug the hole
(as would epoxy).
Plugging and redrilling will make either of
these pretty weak.
Sometimes people suggest peening the metal
back into the hole, for minor mis-oversizing it
could do the trick for you. Take it in small
"bites" with a flat punch on a dead flat
piece of steel, mash the metal inward. Stop
every once in a while, reinstall and and see
if you like the diameter (idle speed) yet.
Hopefully you won't make a whistle.
Or, just buy a junkyard TB for its blade and
start over. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Aren't we talking about blocking the air bypass passage. Not plugging the throttle plate hole. You definitely wouldn't use epoxy to close it.
<strong> Make that "real good with a TIG", since you
can't stand any warpage.
If you chamfer front and back so the epoxy
is physically "kept" then it will be more
reliable. Ditto if you let it be a little
proud to the surface, don't grind it flush.
If you had some lead, dead soft copper or
even soft aluminum, you could sort of "cold
rivet". But this would fully plug the hole
(as would epoxy).
Plugging and redrilling will make either of
these pretty weak.
Sometimes people suggest peening the metal
back into the hole, for minor mis-oversizing it
could do the trick for you. Take it in small
"bites" with a flat punch on a dead flat
piece of steel, mash the metal inward. Stop
every once in a while, reinstall and and see
if you like the diameter (idle speed) yet.
Hopefully you won't make a whistle.
Or, just buy a junkyard TB for its blade and
start over. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Aren't we talking about blocking the air bypass passage. Not plugging the throttle plate hole. You definitely wouldn't use epoxy to close it.
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03-05-2003, 06:46 PM
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Re: What Epoxy to use for closing throttle body idle hole? I think I am going to go with JB weld. I am talking about closing the original whole in the tb blade and drilling another in another location on the blade.
03-05-2003, 07:06 PM
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Re: What Epoxy to use for closing throttle body idle hole? You can use jb weld, quicksteel or some other epoxy. But just be sure to chamfer the edges to give the epoxy something to hold onto so it doesn't slip out of the hole. When you epoxy it in, use something to press it in real good and compact. You shouldn't have any problems.
03-05-2003, 10:01 PM
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Re: What Epoxy to use for closing throttle body idle hole? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by DailyAluminumBlock:
<strong> I think I am going to go with JB weld. I am talking about closing the original whole in the tb blade and drilling another in another location on the blade. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Better way to control idle and a way to idle your engine where ever you want is to epoxy the air bypass passage and then drill a small hole to reopen the passage so the engine doesn't die. You probably won't even have to block the throttle plate hole if you use this method. You will be able to set your idle anywhere you like with the stop screw.
<small>[ March 06, 2003, 06:58 AM: Message edited by: Larry ]</small>
<strong> I think I am going to go with JB weld. I am talking about closing the original whole in the tb blade and drilling another in another location on the blade. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Better way to control idle and a way to idle your engine where ever you want is to epoxy the air bypass passage and then drill a small hole to reopen the passage so the engine doesn't die. You probably won't even have to block the throttle plate hole if you use this method. You will be able to set your idle anywhere you like with the stop screw.
<small>[ March 06, 2003, 06:58 AM: Message edited by: Larry ]</small>
