need advice quick! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

67pro-street · 01-28-2004, 11:03 PM

i was changing the spark plugs on my engine and i was putting in the last plug when i accidentaly screwed up the threads on the engine. What should i do to fix it. I didnt screw up all the threads. I felt it turning kinda hard so i backed out the plug and it only screwed up like the first thread. So would i be able to just get a tap and fix the threads. And can i just leave everything together, or do i need to take the head off to do it. any help would be appreciated. I need to get this thing running soon as it is my daily driver.

thanks,

67pro-street

Tx Firefighter · 01-28-2004, 11:07 PM

Get a thread chaser at the parts store. It's kind of like a tap. It just fixes little boo-boos like you have. No need to remove the head.

melloyello · 01-28-2004, 11:07 PM

I'd say pull the head

krue · 01-28-2004, 11:10 PM

Fill the grooves on the thread chasers with grease to catch any metal shavings.

walker · 01-28-2004, 11:10 PM

You can use a tap, just make sure it is the same thread as your spark plug, try it in another hole first too. before you tap it put grease on the tap to catch the shaving. Do it very slow and carefull.

68c10owner · 01-28-2004, 11:18 PM

i agree with TX. you a chaser instead of a tap. the tap will cut the treads more where a chaser with just clean them up. the tap could cut them too much and could cause a problem. also there is a special chaser and tap for some plugs because some tapper. i can`t remember if the car heads are but i know harley heads are. be carefull and definately put grease on the threads of the chaser.

67pro-street · 01-28-2004, 11:24 PM

thanks a lot fellas. I really appreciate the help

gotmud · 01-29-2004, 09:14 PM

Agree....A Chaser with lots of greese.

01-28-2004, 11:03 PM	#1
67pro-street Registered User Join Date: Jan 2003 Location: Bellingham, WA Posts: 218	need advice quick! i was changing the spark plugs on my engine and i was putting in the last plug when i accidentaly screwed up the threads on the engine. What should i do to fix it. I didnt screw up all the threads. I felt it turning kinda hard so i backed out the plug and it only screwed up like the first thread. So would i be able to just get a tap and fix the threads. And can i just leave everything together, or do i need to take the head off to do it. any help would be appreciated. I need to get this thing running soon as it is my daily driver. thanks, 67pro-street

01-28-2004, 11:07 PM	#2
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Get a thread chaser at the parts store. It's kind of like a tap. It just fixes little boo-boos like you have. No need to remove the head. __________________ I'm on the Instagram- @Gearhead_Kevin

01-28-2004, 11:07 PM	#3
melloyello Registered User Join Date: Nov 2002 Location: Spokane WA Posts: 66	I'd say pull the head __________________ 67 C/20 camper special 350

01-28-2004, 11:10 PM	#4
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,450	Fill the grooves on the thread chasers with grease to catch any metal shavings. __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

01-28-2004, 11:10 PM	#5
walker Registered User Join Date: Jul 2003 Location: north of Phx AZ about 30 miles Posts: 698	You can use a tap, just make sure it is the same thread as your spark plug, try it in another hole first too. before you tap it put grease on the tap to catch the shaving. Do it very slow and carefull. __________________ Andy,Phx AZ '67 C-10 (Ahhh, done at last. Well there is that disk front end I want to put in and...) "23 C-Cab-sold '48 Ford 8N tractor(still working) '67 Scout(Now on the road) '70 MG B.-sold

01-28-2004, 11:18 PM	#6
68c10owner Registered User Join Date: Oct 2003 Location: Carmichael, California Posts: 3,006	i agree with TX. you a chaser instead of a tap. the tap will cut the treads more where a chaser with just clean them up. the tap could cut them too much and could cause a problem. also there is a special chaser and tap for some plugs because some tapper. i can`t remember if the car heads are but i know harley heads are. be carefull and definately put grease on the threads of the chaser. __________________ Anthony

01-28-2004, 11:24 PM	#7
67pro-street Registered User Join Date: Jan 2003 Location: Bellingham, WA Posts: 218	thanks a lot fellas. I really appreciate the help

01-29-2004, 09:14 PM	#8
gotmud Registered User Join Date: Oct 2003 Location: Cumming, Ga Posts: 234	Agree....A Chaser with lots of greese. __________________ Glenn Cumming, Ga (68 C/10 Fleetside LWB 307 (64 C/10 Fleetside Shorty Custom 350, with 73 donor parts aplenty) (2001 Porsche Boxster S - 168 MPH of fun) (2005 Chevy Avalanche Z71 1500)



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