Torque converter bolt problem

[44067gtdart]

I have recently put a PTC torque converter behind my 512 stroker motor, the problem I am having is the 7/16 bolts bottom out before they contact the flex plate. I am using three-quarter inch long bolts. Has anybody else had a problem like this? And if so what is the fix?I think if I put washers to take up the gap, it may contact the back of the block. Any help is definitely appreciated.. Thank you.

 

[Inertia]

Myself,, I'd use vicegrips to hold it,, and take them to the grinder,, trim whatever is nec,, BUT I would be dunking it in cold water every few seconds so it doesn't get hot enuff to affect the bolts "temper".. jmo

(punctuation check,,, it's all good) .. lol

cheers

 

[72bluNblu]

The fix is to use the correct torque converter bolts. They are not standard hardware. The underhead length is only a 1/2", and the bolt head itself is thinner. Standard thickness bolt heads may cause interference, even if you get the underhead distance correct.

http://www.summitracing.com/parts/arp-240-7302/overview/

 

[JBurch]

Moroso also makes converter bolts, as stated above, you need a low profile head on the bolt or risk it hitting the block as it swings.

 

[70aarcuda]

The fix is to use the correct torque converter bolts. They are not standard hardware. The underhead length is only a 1/2", and the bolt head itself is thinner. Standard thickness bolt heads may cause interference, even if you get the underhead distance correct.

http://www.summitracing.com/parts/arp-240-7302/overview/

those

 

[Inertia]

The fix is to use the correct torque converter bolts. They are not standard hardware. The underhead length is only a 1/2", and the bolt head itself is thinner. Standard thickness bolt heads may cause interference, even if you get the underhead distance correct.

http://www.summitracing.com/parts/arp-240-7302/overview/

^^^^^ This.

Mia Culpa,, I assumed (I hate that word), he had proper converter bolts,, that were too long..

my apologies..

 

[RedFish]

Don't allow the bolts to dimple the converter. They have been damaged internally before with bolts too long.

 

[Oldmanmopar]

I have been using 7/16 flex plate to crank bolts in place of the torque converter bolts with no problems. I just cut the heads on a lathe to the same thickness as the original 5/16 bolts. don't clean the edges leave them sharp for a better bite with a box wrench. Works for me and I heve plenty of spares. all early mopar autos have at least 6.

 

[72bluNblu]

Those ARP bolts I linked are 7/16". And they cost $11. Why mess around cutting the wrong bolts down on a lathe when you can just buy the right bolts for $11? Not only that, but they're larger heads and 12 point bolts, so grip won't be an issue.

 

[44067gtdart]

Thanks for all the help.. That's exactly what I needed to know..

 

[transman]

Contact PTC. I'm surprised they don't supply the mounting bolts.

The converter company I worked for ALWAYS supplied converter bolts with every high stall they sold. On race converters they even asked the customer if he required special length bolts, or when the converter was built, did he need a specific size thread.