more bolt sizes needed - flexplate & torque converter - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**guyryan100** · 09-14-2004, 09:50 PM

Ok, bolt size experts... here's an intermediately difficult one for ya (beats the heck out of me). I need to know the size of the 6 bolts between flexplate and engine and the 3 bolts tween flexplate and torque converter. 350 engine if that is relevant (wouldn't think so).

Thanky,

Ryan

Tx Firefighter · 09-15-2004, 06:58 AM

Flexpalte bolts are fine thread for sure, 7/16 I think.

There are two different types of torque converters. Some take bolts that screw into the converter, others take little short 3/8 bolts and nuts.

JimKshortstep4x4 · 09-15-2004, 08:02 AM

Those are pretty special bolts, I would suggest buying the ones made for the flexplate/torque converter.

Jim

**guyryan100** · 09-15-2004, 08:40 AM

my torque converter is the type that doesn't require nuts - has threaded holes. Thinks the parts house guys would have the specialized bolts? (This is the only thing preventing me from installing engine today!!)

**guyryan100** · 09-15-2004, 09:12 AM

Update - AutoZone carries the specialized bolts. That makes it easy!

mrein3 · 09-15-2004, 01:32 PM

Quote:

Originally Posted by guyryan100

Update - AutoZone carries the specialized bolts. That makes it easy!

You beat me to it. I was going to add that I took a th350/np205 out of a 1972 Blazer doner. It had the bolts and nuts holding the flex plate on the torque converter. I sent the th350 to a reputable (sp?) rebuilder down in St. Paul. They suggested a new torque converter which they had in stock. It took the specialized bolts with no nuts. I believe they are metric but I never bothered to check because they fit and the swap was too long ago to remember if I had to go find a metric wrench to tighten them.

LostMy65 · 10-23-2015, 09:30 AM

Searched and found my answer.
Thanks

09-14-2004, 09:50 PM	#1
guyryan100 Registered User Join Date: Sep 2001 Location: Cumming, GA Posts: 485	more bolt sizes needed - flexplate & torque converter Ok, bolt size experts... here's an intermediately difficult one for ya (beats the heck out of me). I need to know the size of the 6 bolts between flexplate and engine and the 3 bolts tween flexplate and torque converter. 350 engine if that is relevant (wouldn't think so). Thanky, Ryan

09-15-2004, 06:58 AM	#2
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Flexpalte bolts are fine thread for sure, 7/16 I think. There are two different types of torque converters. Some take bolts that screw into the converter, others take little short 3/8 bolts and nuts. __________________ I'm on the Instagram- @Gearhead_Kevin

10-23-2015, 09:30 AM	#7
LostMy65 But Found Her 25yrs Later! Join Date: Oct 2010 Location: Oregon City, Oregon Posts: 10,530	Re: more bolt sizes needed - flexplate & torque converter Searched and found my answer. Thanks __________________ I lost my 65 - Found it 25 years later: http://67-72chevytrucks.com/vboard/s...d.php?t=426650 66 C20 Service Truck: http://67-72chevytrucks.com/vboard/s...d.php?t=428035

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09-15-2004, 08:02 AM	#3
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	Those are pretty special bolts, I would suggest buying the ones made for the flexplate/torque converter. Jim

09-15-2004, 08:40 AM	#4
guyryan100 Registered User Join Date: Sep 2001 Location: Cumming, GA Posts: 485	my torque converter is the type that doesn't require nuts - has threaded holes. Thinks the parts house guys would have the specialized bolts? (This is the only thing preventing me from installing engine today!!)

09-15-2004, 09:12 AM	#5
guyryan100 Registered User Join Date: Sep 2001 Location: Cumming, GA Posts: 485	Update - AutoZone carries the specialized bolts. That makes it easy!



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