Author Topic: I need your help a knock in my 1970 Challenger 340  (Read 1045 times)

Offline 70chall440

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Re: I need your help a knock in my 1970 Challenger 340
« Reply #15 on: December 04, 2020 - 11:18:28 PM »
The heat technique can work but you need to be very careful as there are other things there that can be affected such as the radiator shroud etc. For things like that I normally use MAP gas, a lot easier to deal with in tight confines. All this said, you should be using tubing wrenches and not normal open ended wrenches, but since you are going to replace them, just cut them off, let them drain and then you can use whatever (vice grips) to get them off.
Current Mopar
70 Challenger RT 440-6 EFI, 73 Cuda 416-6 EFI
05 Hemi Durango, 01 Ram 4x4, 14 Ram 2500 4X4, 10 PCP Challenger 6 spd RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR (under const)
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)




Offline jimynick

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Re: I need your help a knock in my 1970 Challenger 340
« Reply #16 on: December 05, 2020 - 10:30:56 PM »
"The heat technique can work but you need to be very careful as there are other things there that can be affected such as the radiator shroud etc." You're right Mike, but I use a #2 tip and the heat control is pinpoint. Maybe I'm confused (ya think?) but I thought the man's issues were at the trans. Either way it works well, but as mentioned, be careful and I always have a squirt bottle of water handy as well as a decent fire extinguisher. We've never had to use it, but safe is safe.  :cheers:

Offline 70chall440

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Re: I need your help a knock in my 1970 Challenger 340
« Reply #17 on: December 05, 2020 - 11:55:53 PM »
Well like all things car related, it quickly spirals. His issue is that the flex plate is loose, but as you well know this can easily turn into a whole host of other problems and issues.

I agree with your tip/s, very handy.
Current Mopar
70 Challenger RT 440-6 EFI, 73 Cuda 416-6 EFI
05 Hemi Durango, 01 Ram 4x4, 14 Ram 2500 4X4, 10 PCP Challenger 6 spd RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR (under const)
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)

Offline brotow

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Re: I need your help a knock in my 1970 Challenger 340
« Reply #18 on: December 06, 2020 - 05:22:23 PM »
Got the flex plate out, crank holes look good, converter holes look slightly egged, opinions, should I replace?  Bolts look good , I already ordered new. Check out my "engine stabilizer,"transmission jack".






70 Chall. vert.(in process) - 73 Amx -74 Javelin- 87 Wrangler-02 Sebring conv. 2005 Crossfire srt roadster

Offline jimynick

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Re: I need your help a knock in my 1970 Challenger 340
« Reply #19 on: December 06, 2020 - 09:38:12 PM »
If the holes are elongated, I'd change the flex plate for sure. You don't want to be doing this a second time. If the bolts look good, I'd probably reuse them, but I'd also put a wee drop of Loctite on them as well, and torque them twice.  :cheers:

Offline 70chall440

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Re: I need your help a knock in my 1970 Challenger 340
« Reply #20 on: December 06, 2020 - 11:33:38 PM »
Personally, I would definitely replace the flex plate, it is compromised. Unless the TC bolts were loose, the TC should be good.
Current Mopar
70 Challenger RT 440-6 EFI, 73 Cuda 416-6 EFI
05 Hemi Durango, 01 Ram 4x4, 14 Ram 2500 4X4, 10 PCP Challenger 6 spd RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR (under const)
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)

Offline 1970TA

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Re: I need your help a knock in my 1970 Challenger 340
« Reply #21 on: December 07, 2020 - 04:40:55 PM »
Since you have it apart, I'd upgrade to the B&M flexplate, 10230.
That's what I did when my stock flexplate holes were elongated.
https://www.summitracing.com/parts/bmm-10230

Offline brotow

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Re: I need your help a knock in my 1970 Challenger 340
« Reply #22 on: December 07, 2020 - 05:10:48 PM »
My flex plate is still good.....yesss
70 Chall. vert.(in process) - 73 Amx -74 Javelin- 87 Wrangler-02 Sebring conv. 2005 Crossfire srt roadster

Offline 70chall440

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Re: I need your help a knock in my 1970 Challenger 340
« Reply #23 on: December 07, 2020 - 10:08:22 PM »
what makes you think it is good? It might be but you said the converter holes were elongated previously.
Current Mopar
70 Challenger RT 440-6 EFI, 73 Cuda 416-6 EFI
05 Hemi Durango, 01 Ram 4x4, 14 Ram 2500 4X4, 10 PCP Challenger 6 spd RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR (under const)
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)

Offline brotow

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Re: I need your help a knock in my 1970 Challenger 340
« Reply #24 on: December 08, 2020 - 07:26:37 PM »
After taking a closer look the holes seem fine.





70 Chall. vert.(in process) - 73 Amx -74 Javelin- 87 Wrangler-02 Sebring conv. 2005 Crossfire srt roadster

Offline 70chall440

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Re: I need your help a knock in my 1970 Challenger 340
« Reply #25 on: December 29, 2020 - 12:25:06 AM »
Yeah the holes don't look bad, just make sure you use a little loctite on the crank bolts and converter bolts, not a lot and not the HD crap (red), just use the blue stuff 222 or 242.
Current Mopar
70 Challenger RT 440-6 EFI, 73 Cuda 416-6 EFI
05 Hemi Durango, 01 Ram 4x4, 14 Ram 2500 4X4, 10 PCP Challenger 6 spd RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR (under const)
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)