Re: thread chaser taps, which ones to get
[Re: sportfury70]
#2697227
09/13/19 02:56 PM
09/13/19 02:56 PM
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Joined: Aug 2019
Posts: 10,089 Super Spudsville
Mr PotatoHead
Half Baked
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Half Baked
Joined: Aug 2019
Posts: 10,089
Super Spudsville
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Ive never had anything crusty enough to feel the need to chase or run a tap down anything and its never caused me a problem. I will spend 2-3 hours cleaning a block after the machine work is done and use a good SS brush in all holes. Brake clean each hole and blow them out then after the 2-3 hours do the finial big soapy wash. So myself have never seen the need to chase every thread, hole, ect.
If you just spent $1700 on manchine work on a block Id hope the shop might of done this already if it was needed.
STOP POTATO HATE!
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Re: thread chaser taps, which ones to get
[Re: Mr PotatoHead]
#2697238
09/13/19 03:53 PM
09/13/19 03:53 PM
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Joined: Feb 2005
Posts: 20,273 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,273
PA.
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Ive never had anything crusty enough to feel the need to chase or run a tap down anything and its never caused me a problem. I will spend 2-3 hours cleaning a block after the machine work is done and use a good SS brush in all holes. Brake clean each hole and blow them out then after the 2-3 hours do the finial big soapy wash. So myself have never seen the need to chase every thread, hole, ect.
If you just spent $1700 on manchine work on a block Id hope the shop might of done this already if it was needed. Not unless you tell them to and pay them to do it. Even then they probably wouldn’t do it. You do know that the holes aren’t tapped the whole way to the bottom during manufacturing of a stock block, right?
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.38@138.67
Livin and lovin life one day at a time
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Re: thread chaser taps, which ones to get
[Re: pittsburghracer]
#2697243
09/13/19 04:08 PM
09/13/19 04:08 PM
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Joined: Aug 2019
Posts: 10,089 Super Spudsville
Mr PotatoHead
Half Baked
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Half Baked
Joined: Aug 2019
Posts: 10,089
Super Spudsville
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Before I reply to what I think I should reply,
"You do know that the holes aren’t tapped the whole way to the bottom during manufacturing of a stock block, right?"
In your opinion whats the significance of that?
STOP POTATO HATE!
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Re: thread chaser taps, which ones to get
[Re: Mr PotatoHead]
#2697246
09/13/19 04:14 PM
09/13/19 04:14 PM
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Joined: Feb 2005
Posts: 20,273 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,273
PA.
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Before I reply to what I think I should reply,
"You do know that the holes aren’t tapped the whole way to the bottom during manufacturing of a stock block, right?"
In your opinion whats the significance of that? Proper torque I’m thinking but what do I know. Just a self taught engine builder here
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.38@138.67
Livin and lovin life one day at a time
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Re: thread chaser taps, which ones to get
[Re: pittsburghracer]
#2697256
09/13/19 05:08 PM
09/13/19 05:08 PM
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Joined: Aug 2019
Posts: 10,089 Super Spudsville
Mr PotatoHead
Half Baked
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Half Baked
Joined: Aug 2019
Posts: 10,089
Super Spudsville
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Thank you for your reply and I understand that reply to a point but every arp stud ive ever installed has never had a thread left exposed on the stud and put in hand tight as arp says do not tq the stud in the hole, finger tight and ive seen some people go as far as it will go them just a hair back. But maybe you have encountered holes not drilled/tapped fully. One thing I have noticed I dont like on some mid 70-s blocks, although my dislike dosent mean its wrong is but you can tell when they drilled and tapped the holes for the main caps in the block and they did it so forcefully it turned the immediate area around the holes black from heat. I wont drop the shops names because of the bashing ways of the internet but some machine work ive had done by well known mopar shops, ex racers, then machine shop owners that involved areas concerning the mains and caps and such upon align boring and honing, none ever questioned or suggested to tap out more material when I take them a studded block to work on. But I also take them already hot tanked and cleaned blocks. But I understand why people do it and do so on more crusty core blocks that have been in the elements for a while or are in humid areas. Before I reply to what I think I should reply,
"You do know that the holes aren’t tapped the whole way to the bottom during manufacturing of a stock block, right?"
In your opinion whats the significance of that? Proper torque I’m thinking but what do I know. Just a self taught engine builder here
STOP POTATO HATE!
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Re: thread chaser taps, which ones to get
[Re: Mr PotatoHead]
#2697308
09/13/19 08:35 PM
09/13/19 08:35 PM
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Joined: Jun 2005
Posts: 6,257 gulfport, ms, west mi
rowin4
master
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master
Joined: Jun 2005
Posts: 6,257
gulfport, ms, west mi
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I bought a set of thread chasers from Jegs many years ago. Have used them on many builds with no problem. Chuck them in my drill on slow speed . No taps ever!!!. There is no reason to use a tap, why would you want to cut metal out of a torque holding surface ?
it's ok to butt heads, just don't do it with a butthead
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Re: thread chaser taps, which ones to get
[Re: gzig5]
#2697441
09/14/19 12:17 PM
09/14/19 12:17 PM
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Joined: Sep 2003
Posts: 20,272 north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
Joined: Sep 2003
Posts: 20,272
north of coder
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I have a set of the cheap Summit ones and have used them effectively. If you are really cheap or just in a fix then just cut a vertical slot or two in the threads of a bolt and use that, you'll get the same result. For the price of the Summit ones, it's probably cheaper just to buy them than make your own.... This^^^. For $10 the summit ones are nice to have. But if you are missing a size, a grade 8 (preferably) bolt and dremel cutoff wheel will create the exact same thing it about one minute. as a former machinist of 42+yrs, i have done this many, many times on odd size female threads if a chaser is not available, or i needed a job completed without enough time to procure one. a dremel is nice, but if you don't have one, a hacksaw will, and does, work. one thing to watch, however, if you don't want to bottom tap your female holes. [yes, that is the proper nomenclature ! i can hear the jokes and comments already.] make SURE your aftermarket bolts or studs do not bottom out on the existing threads. this is especially important for using bolts. even 1/2 a thread can give you false torque readings, plus bad clamping loads.
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Re: thread chaser taps, which ones to get
[Re: moparx]
#2697537
09/14/19 05:10 PM
09/14/19 05:10 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
OP
Circle Track
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OP
Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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^^^ are you sayin just to check thread engagement/shank protrusion so the bolt does not go all the way to the bottom (which I certainly see how that would appear to be torqued/tight but not near enough clamping load in a borderline deal. this block was baked clean & looks pristine & what is behind this is in some prior SB builds the head gaskets were not compressed to what felpro says they should compress to (& that is with the std torque amt on the OE head bolts, I forget the #) & that got me thinking that I want to avoid that in this 408 build with .040 cometics that I want to get .040 quench.
live every 24 hour block of time like it's your last day on earth
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Re: thread chaser taps, which ones to get
[Re: RapidRobert]
#2697604
09/14/19 08:48 PM
09/14/19 08:48 PM
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Joined: Jan 2003
Posts: 12,814 Benton, IL.
DaveRS23
Master of nothing...
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Master of nothing...
Joined: Jan 2003
Posts: 12,814
Benton, IL.
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For me personally, as a non professional, if the bolt will thread through to the bottom with little resistance, I am good. That usually means with my fingers, not a wrench. If the bolt meets enough resistance that I need a wrench, I will chase the threads until it runs in finger tight. Whether that means with a tap, a thread chaser, or a grade 8 bolt with slots cut doesn't matter much to me. It is usually just the one time. The HF taps and dies have gotten me there for years with no problems. Not bad for the $15 of so I paid for them. If the bolt happens to bottom early, I just throw a washer or two under the head of the bolt. This may not be the professional way to do it, but I have never had an issue doing it this way. I usually make sure the head bolts will run down all the way without the head gasket or the washers in place. If they will all run down with a small amount of torque without the head gasket and washers, then I feel that they will torque down fine with the head gasket and washers. Just cheaper and easier for me rather than having a bunch of different expensive taps. Just my
Master, again and still
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Re: thread chaser taps, which ones to get
[Re: DaveRS23]
#2697702
09/15/19 10:10 AM
09/15/19 10:10 AM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
OP
Circle Track
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OP
Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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^^^ Dave that is top notch info, thank you!
live every 24 hour block of time like it's your last day on earth
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Re: thread chaser taps, which ones to get
[Re: BradH]
#2697883
09/15/19 09:12 PM
09/15/19 09:12 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
OP
Circle Track
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OP
Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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Agreed, nothing can be assumed/taken for granted.
live every 24 hour block of time like it's your last day on earth
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