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Rusted and Broken Cradle Bolts?

Tiny
LEMONCAR
  • MEMBER
  • 2010 DODGE CHALLENGER
  • 3.5L
  • V6
  • 2WD
  • AUTOMATIC
  • 178,000 MILES
I discovered two engine cradle bolts snapped from corrosion. I can't seem to find the correct part number, hoping this site could tell me.

i looked at a parts supplier diagram but it doesn't show me how many engine cradle bolts that I have. 2 or 4?
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Sunday, August 28th, 2022 AT 7:40 PM

9 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,256 POSTS
Wow, you don't see that every day, thanks for the images. You will need to call the dealer for the bolts because they are special to the car and they don't give us part numbers for them, but I did find out how to remove the cradle, you will need an engine sling to do the job. I would spray wd40 and let it sit for a day with it on the bolts. Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.
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Monday, August 29th, 2022 AT 10:56 AM
Tiny
LEMONCAR
  • MEMBER
  • 36 POSTS
So, I got one half out. It was brutal. But I am struggling to find a replacement bolt. Absolutely no help or response from Mopar. I'll have to measure the bolt I am guessing to figure out the thread spacing and length of the head is a 18mm.
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Friday, September 2nd, 2022 AT 10:03 AM
Tiny
LEMONCAR
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  • 36 POSTS
It is the driver side and so the new bolt whenever I find it won't have anything to hold on to. I'll need to weld new steel and pretty much just refab the structure, brutal.
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Friday, September 2nd, 2022 AT 5:46 PM
Tiny
LEMONCAR
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  • 36 POSTS
Got it, just the hex part is ceased and I accidentally rounded it with the 18mm so I'll have to use vise grips or a 17mm hammered on socket to get the hex head out.
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Friday, September 2nd, 2022 AT 6:32 PM
Tiny
KEN L
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  • 47,256 POSTS
Wow, great job getting those at, I have never seen so much rust on these parts, if you get a new car someday undercoat the heck out of it. Also, if you have an acetylene torch it can help remove the rust. I believe the thread pitch of the bolt is 1.5 let me know what happens.
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Saturday, September 3rd, 2022 AT 11:47 AM
Tiny
LEMONCAR
  • MEMBER
  • 36 POSTS
Thanks, I got most of it out just need the hex head out from the driver side and the screw plus nut from the passenger side, then I'm home free. I found out more information on the bolt should help me find replacement quicker now. It's a M18 x 1.5 x 180mm long.
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Sunday, September 4th, 2022 AT 3:40 AM
Tiny
KEN L
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Yep, sounds correct, do you have an industrial hardware store near you?
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Monday, September 5th, 2022 AT 9:16 AM
Tiny
LEMONCAR
  • MEMBER
  • 36 POSTS
I checked and most of the stores around me don't have that size or the grade 10.9. However, after many calls to Dodge dealerships around my city, one finally responded, and they pointed me to this part that should fit 06508734AA. Unfortunately, it has to be ordered from the American Mopar warehouse and it'll take 10 days to get here (Ontario).

V6 3.5L engine cradle bolts, engine cradle screws. Part number 06508734AA
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Monday, September 5th, 2022 AT 12:35 PM
Tiny
KEN L
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Nice work, we are here to help, please use 2CarPros anytime.
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Tuesday, September 6th, 2022 AT 10:39 AM

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