Check your intake manifold bolts

[PT-4]

Still haven't found a YouTube video on this.

 

[Wild one]

Still haven't found a YouTube video on this.

I'm gonna go out on a limb here,and say if you need a video to torque the intake bolts,you probably shouldn't be working on your truck.Just my 02 though. Red posted the torque sequence,and i gave you the size of socket you needed,plus gave you a good tip of where the bolts are ,it's up to you to go look at the manifold from there.

 

[pacofortacos]

I checked mine a few years ago and they were tight, haven't checked them since.

 

[ThunderMug95]

I ordered a new pcv so I will check my intake bolts this weekend when I do some wrenching…I have some fun stuff to do this weekend.
I will be glad to make a YouTube video, just donate a Moe’s ported 6.4 intake I will make it happen!

 

[Wild one]

Just to change this thread up a bit,has anybody used the Fel Pro intake gaskets ,they're alot cheaper then buying them from Ma Mopar.

Intake Manifold Set Fel-Pro MS97089 | eBay

Find many great new & used options and get the best deals for Intake Manifold Set Fel-Pro MS97089 at the best online prices at eBay! Free shipping for many products!

www.ebay.ca

 

[huntergreen]

I'm gonna go out on a limb here,and say if you need a video to torque the intake bolts,you probably shouldn't be working on your truck.Just my 02 though. Red posted the torque sequence,and i gave you the size of socket you needed,plus gave you a good tip of where the bolts are ,it's up to you to go look at the manifold from there.

Very little I can do anymore. Don’t have the skills or correct diagnostic tools. That being said, I can torque bolts if needed. Lol again thanks for the advice and diagram for proper sequence.

 

[BadHemi2014]

Glad you brought this up again. I saw this issue on this forum before, and checked mine. Sure enough they were a bit loose, and retorquing them did fix a P219 code. That's been a while, I'll go check them again.

 

[grizzstang]

Maybe it's time to check these again.

I torqued mine a couple of times a few years ago and I figured I would leave them alone after that.

I didn't want to risk cracking the intake but if that is not really a concern and some are doing it every year with no issues, I will have to take a look at them.

 

[RedSRT4Me]

Sorry to be the heterodox again, but while the theory is good I'm not so sure the expansion/contraction of the intake manifold is causing the intake bolts to turn (loosen).

The gasket used in this application is a elastic rubber-like compound O-ring. Over time they lose some of their elasticity due to heat. This results in loss of elastic pressure with resulting loss of force against any two components being sealed. Like a lot of intake manifolds these days, new ones almost always come with new O-ring seals.

I've asked techs if they've ever found an intake seal that cause a problem on a Hemi, and the answer has always been "no". Of course, it doesn't mean it can't happen. But I suspect periodic retightening is only bringing the intake surface closer to the cylinder head and eventually the intake surface will be in full contact with the head. This could cause the intake to crack.

Regards,
Dusty
2019 Ram 1500 Billet Silver Quad Cab 2WD, 5.7 Hemi, 8HP75, 3.21 axle, 33-gallon fuel tank, factory dual exhaust, 18” wheels. Build date: 3 June 2018. Now at 82990 miles

I agree I don't think it's contraction, my research leads to vibration as the root cause.

37's, Driveshaft needs u joints and carrier bearing and the list goes on.

I do know when we have 50° F swing days from cold to hot in Arizona contraction is playing some role, but only after vibration does the dirty work.

So as the intake manifold loosens up ever so slightly here is what happens:

Misfire at idle only when cold
P0300
P0304
P0307
P0308

From those codes alone you can tell which cyls were loose so I already knew they would not be tight again.

P-219B also popped which is course for me is definitely telling me the IM is leaking.

So I went through with 105 inlbs torque sequence. No dice they loosened up

Couple days later did 110inlbs in sequence. Same result.

Scratching my head maybe those square gaskets have gone bad? Looked up online saying IM torque is 10ftlbs which equates to 120inlbs.

Retorqued the IM in sequence and all problems are fixed. 120 is the magic number that worked for me.

From a power difference I was loosing up to 50ftlbs of torque between 2500-3000rpms with 30% throttle. Reviewed some data fixing this issue. I was shocked and it's a noticeable seat of the pants difference now.

 

[Daw14]

I just checked my 2014 with 27,000 miles on it and they were as loose as could be. Thanks for the heads up. Everyone needs to check and retighten theirs.