Anybody ever check their upper intake bolts?

[tidefan1967]

Apparently the composite upper intake on the 5.7/6.4 Hemi's has a problem with the intake bolts loosening up over time. After noticing that the idle on my newly acquired 2016 Challenger is not as smooth as that of my 2017 RAM I started wondering about what the difference could be. I checked the intake manifold bolts on the Challenger and they were no tighter than 40 in/lbs tops against a 105 in/lb spec. It did improve the idle somewhat by the way. I decided to check the truck yesterday just for the hell of it and they were even looser than those on the Challenger. Anyway i was just curious if anyone else had ever read anything else about this or had a similar issue.

 

[Hemi395]

Damn gonna have to check mine now, thanks!

 

[ajs3]

Yup, loose as ****. I check them every oil change.

Sent from my XT1650 using Tapatalk

 

[McBroom]

Would lock washers help prevent them from coming loose?

Good preventative maintenance is crucial to the longevity of any vehicle.

Blue Mule

 

[grizzstang]

No I haven't checked mine but I would not be surprised to find them loose.

105 in/lb you could almost do with your bare hands. Kidding of course.

I am concerned that torqueing them back down on an older brittle plastic intake might cause it to crack.

 

[Hemi395]

Big thanks to @tidefan1967 for finding this. ALL of my intake manifold bolts were loose. Several in the middle and toward the throttle body were barely finger tight.

If your truck is a few years old or you have a good amount of miles on it it's worth the 15 mins to check them. Just go slow and easy, 105 in/lbs is fairly light. It's an 8mm bolt fyi.

 

[U&A]

NICE FIND TIDE!!!

I wont ever make jokes again about how you eat tide pods[emoji1787][emoji1787][emoji1787]

Seriously though. Thank you for posting this sir! Im going to check tonight and post the results[emoji1303][emoji1303][emoji1303]


Sent while firmly grasping my redline lubed RAM [emoji231]

 

[Burla]

Thanks Tidefan, great info.

 

[Hemi395]

Also the service manual specifies loctite on the bolts. Mine was off back in 2016 for warranty work at the dealer. Bets on they never used loctite?

 

[pacofortacos]

Thanks! I will check mine (hopefully I remember) when it gets a bit warmer. 30's is too cool for me to crawl around on the motor.

I wonder if loctite is needed.

 

[Tim Garceau]

Haven’t heard of anyone having a vacuum leak caused by this but the expansion rates between materials would make this logical if a thread lock was intended.

 

[U&A]

Haven’t heard of anyone having a vacuum leak caused by this but the expansion rates between materials would make this logical if a thread lock was intended.

VERY much so.

got ride of that plastic thread on my spin on filter in my 66RFE because of this very reason.




Sent while firmly grasping my redline lubed RAM [emoji231]

 

[Bigpaul13]

Thanks for the heads up, will have to check this weekend. I just had some warranty work done where they replaced the seals (or orings, don't rememeber) because I saw some oil leaking through. Hopefully they tightened them correctly.

 

[huntergreen]

Thanks Tidfan. Great info.

 

[Hemi395]

Thanks for the heads up, will have to check this weekend. I just had some warranty work done where they replaced the seals (or orings, don't rememeber) because I saw some oil leaking through. Hopefully they tightened them correctly.

What seals did they replace?

 

[Bigpaul13]

What seals did they replace?

On the intake. If I remember correctly there were 8 of a part number listed on the sheet. Took it in for manifold bolts and I saw an oil stain near the intake so had them check it out. Think they did the pcv orings too. I ordered a catch can after seeing that and the amount of oil just sitting in my S&b intake.

 

[Wild one]

On the intake. If I remember correctly there were 8 of a part number listed on the sheet. Took it in for manifold bolts and I saw an oil stain near the intake so had them check it out. Think they did the pcv orings too. I ordered a catch can after seeing that and the amount of oil just sitting in my S&b intake.

Those damn intake seals are pricey little buggers,i replaced them on mine awhile ago,and by the time the dealer was done with me,i walked funny,lol

 

[OCDTech]

,and by the time the dealer was done with me,i walked funny,lol

I usually say that, or my favorite, The proper way to walk into the dealer is to bend over, turn around and back in.

 

[R.L.K.]

Thanks Tide ! Ill be checking mine tomorrow [emoji106]
I have about 95k on my truck [emoji848][emoji848][emoji50]

Sent from my SM-G930V using Tapatalk

 

[Burla]

Those damn intake seals are pricey little buggers,i replaced them on mine awhile ago,and by the time the dealer was done with me,i walked funny,lol

If you don't want us to laugh at your pain, stop bringing jokes.