Check your intake manifold bolts

[Wild one]

Here is the torque sequence

View attachment 510854

Yes it is the car manifold as the TB faces the drivers side.

It also fixes the P219-A and P219-B if you wind up with those codes.

Thanks for posting the torque sequence Red.

 

[mikeru]

Heat expands the composite intake,then it shrinks when it cools off,eventually the bolts loosen up.Do a search on here,you'll find the odd thread/post about the issue.If you don't believe me,go out and check yours.If your truck is a couple years old and has gone through a few heat cycles,good chance the bolts will need retorquing. Not gonna argue about it,just giving the guys that don't know about the issue a heads up.It's up to you to check them or not if you want,but you've been given a heads up about the issue. One of the reasons i hate the stupid engine cover FCA used to put on the 5.7's,i think it compounds the issue,plus you have to remove it to get at the bolts.The bolts are in behind the injector fuel rail if you decide to check yours,but are easy to get at with a 1/4" drive extension and 5/16's socket,a 3/8's drive socket and extension can be used,but is a bit harder to get on the bolts

I'm not disputing your claims, it's just that I hadn't heard anything about this being an issue. I've owned quite a few vehicles with composite intakes and I haven't had any issues with the bolts needing to be retorqued. It could just be a case of not owning any of those vehicles long enough to have issues with them. It's a good suggestion and I'll definitely check ours when I do the next oil change in a couple months. Thanks for bringing it up.

 

[Wild one]

I'm not disputing your claims, it's just that I hadn't heard anything about this being an issue. I've owned quite a few vehicles with composite intakes and I haven't had any issues with the bolts needing to be retorqued. It could just be a case of not owning any of those vehicles long enough to have issues with them. It's a good suggestion and I'll definitely check ours when I do the next oil change in a couple months. Thanks for bringing it up.

It's also fairly common on the 5.7 /6.4 Chargers / Challengers / 300's etc..Pretty well any composite intake manifold needs a bit of maintence eventually.

 

[Douglas Walouke]

Great tip! I've had these break at least once on my 2014 1500. May take a crack at doing this myself. Before I go out and search, is there a YouTube video on how to find these bolts? I'm not totally incompetent, but I'm no gear-head!

Thanks!

 

[Wild one]

Great tip! I've had these break at least once on my 2014 1500. May take a crack at doing this myself. Before I go out and search, is there a YouTube video on how to find these bolts? I'm not totally incompetent, but I'm no gear-head!

Thanks!

Once you take the intake cover off,you'll see them in behind the fuel rail.They're 5/16" / 8mm,and are easier to get at if you use a 1/4" drive socket and extension,a 3/8" drive socket and extension can be used,but it's a bit harder to get the socket in between the fuel rail and onto the bolt head.

 

[plainsman]

I recently took my 2015 1500 Laramie 5.7 in for a checkup as I was going off extended warranty (86,000 mi). He said they tightened up some loose manifold nuts. Not sure the details but glad I had things checked while on warranty.

 

[Dusty]

I'm not disputing your claims, it's just that I hadn't heard anything about this being an issue. I've owned quite a few vehicles with composite intakes and I haven't had any issues with the bolts needing to be retorqued. It could just be a case of not owning any of those vehicles long enough to have issues with them. It's a good suggestion and I'll definitely check ours when I do the next oil change in a couple months. Thanks for bringing it up.

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

 

[huntergreen]

Thanks for posting the torque sequence Red.

Thanks for the advice and link.

 

[ILLXJ]

Printed out & filed in my RAM folder.

 

[Wild one]

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've been staying on top of my intake bolts for 8 years now,last thing i've worried about is it cracking because it's to tight.You're only torquing it to 9 lb-ft/108 in-lbs,which isn't much more then you can crank by hand with a 1/4" nutdriver.Maybe if you got onto it and heaved it tight,and went way over the torque spec,it might crack.It's 2 machined surfaces that are mating together