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What size "TAP " 3800 by Lou6t4gto
Started on: 07-11-2013 01:07 AM
Replies: 11 (336 views)
Last post by: Lou6t4gto on 07-14-2013 03:00 AM
Lou6t4gto
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Report this Post07-11-2013 01:07 AM Click Here to See the Profile for Lou6t4gtoClick Here to Email Lou6t4gtoSend a Private Message to Lou6t4gtoEdit/Delete MessageReply w/QuoteDirect Link to This Post
What size tap is needed to "Chase" the Head Bolt Holes in a 1997 3800 ? Thanks
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sco77
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Report this Post07-11-2013 02:06 AM Click Here to See the Profile for sco77Click Here to Email sco77Send a Private Message to sco77Edit/Delete MessageReply w/QuoteDirect Link to This Post
7/16-14

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86 Fiero GT 4spd - (pending L67 swap: VS cam, GenV) Build Progress eta: 8/13
98 GTP - Some mods

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jb1
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Report this Post07-11-2013 02:07 AM Click Here to See the Profile for jb1Click Here to Email jb1Send a Private Message to jb1Edit/Delete MessageReply w/QuoteDirect Link to This Post
7 /16 x 14

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87 GT
series 1 3800sc (7.597 @88.53 1.579 60ft)
(series II swap in progress)
85GT Northstar
86GT 3800 n/a

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1fast2m4
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Report this Post07-11-2013 06:20 AM Click Here to See the Profile for 1fast2m4Send a Private Message to 1fast2m4Edit/Delete MessageReply w/QuoteDirect Link to This Post
Obviously your going to use a thread chaser NOT a tap. A tap will cut new threads if you run off course even a little bit. A chaser won't.
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Lou6t4gto
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Report this Post07-11-2013 01:23 PM Click Here to See the Profile for Lou6t4gtoClick Here to Email Lou6t4gtoSend a Private Message to Lou6t4gtoEdit/Delete MessageReply w/QuoteDirect Link to This Post
yes, just cleaning the threads.
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Jncomutt
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Report this Post07-11-2013 09:21 PM Click Here to See the Profile for JncomuttClick Here to Email JncomuttSend a Private Message to JncomuttEdit/Delete MessageReply w/QuoteDirect Link to This Post
I took an old bolt and cut lengthwise groves in it. Seems to have worked well enough.
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Lou6t4gto
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Report this Post07-11-2013 11:08 PM Click Here to See the Profile for Lou6t4gtoClick Here to Email Lou6t4gtoSend a Private Message to Lou6t4gtoEdit/Delete MessageReply w/QuoteDirect Link to This Post
sounds good, "home tool". what did you do, 4-6 grooves ?
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trotterlg
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Report this Post07-11-2013 11:40 PM Click Here to See the Profile for trotterlgClick Here to Email trotterlgSend a Private Message to trotterlgEdit/Delete MessageReply w/QuoteDirect Link to This Post
One nice cut with a die grinder will be just fine. And using a tap will not hurt anything at all. Larry

[This message has been edited by trotterlg (edited 07-11-2013).]

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Lou6t4gto
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Report this Post07-12-2013 12:09 AM Click Here to See the Profile for Lou6t4gtoClick Here to Email Lou6t4gtoSend a Private Message to Lou6t4gtoEdit/Delete MessageReply w/QuoteDirect Link to This Post
OK, I've already got a reg tap. thanks
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DIY_Stu
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Report this Post07-14-2013 01:54 AM Click Here to See the Profile for DIY_StuClick Here to visit DIY_Stu's HomePageSend a Private Message to DIY_StuEdit/Delete MessageReply w/QuoteDirect Link to This Post
use fingers only with that tap. slight wobble to keep it loose. you can cut the threads. destroyed a block using Taps to clean threads. then I learned how. but I own a full set of thread chasers now.
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sco77
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Report this Post07-14-2013 02:20 AM Click Here to See the Profile for sco77Click Here to Email sco77Send a Private Message to sco77Edit/Delete MessageReply w/QuoteDirect Link to This Post
Yeah you definitely don't want to damage the threads here, most of the holes go right into coolant passage, if you damage the thread it will be harder for sealant to work and you might get hidden coolant leaks into your valve covers.

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86 Fiero GT 4spd - (pending L67 swap: VS cam, GenV) Build Progress eta: 8/13
98 GTP - Some mods

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Lou6t4gto
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Report this Post07-14-2013 03:00 AM Click Here to See the Profile for Lou6t4gtoClick Here to Email Lou6t4gtoSend a Private Message to Lou6t4gtoEdit/Delete MessageReply w/QuoteDirect Link to This Post
I've been doing chevy, Pontiac, ford & chrysler V8s for 30 years with a Tap., I think I can manage it. just needed to make sure of the size,( that the threads weren't metric). Thanks
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