Hemi tick

[Runaround]

I have a 2015 5.7 Hemi with approximately 180,000 miles that has developed a tick at start up. How do I know if it is exhaust manifolds leaking due to broken bolts or lifter problems?

 

[Jaymwbrown]

My understanding, at least when my 2011 did that, if the tick only happens on a cold start really, or goes away after about 1 minute of warmup it's the manifold.

Jason

 

[EdGs]

When the engine is cold, reach in through the wheel wells and grab the corners of the heat shields, and see if they are loose. If they are, broken bolts it is.

Usually the tick will subside when the engine warms up, but not always. My '15 got quieter, but tick was still there. I had the top rearmost bolt broken on both sides, and my exhaust manifolds were warped and twisted, too.

 

[RAM208]

Late to the party but I had 2 go and could hear a loud clacking noise for about 3-5 seconds and then it would quiet down unless it was super cold. However I've noticed a tick noise and got underneath the truck and could see carbon buildup on the driver side (unrepaired) thinking my driver side has only one bolt broke at the moment and planning to take it in to get fixed. Find a reputable muffler shop if you haven't already gotten it fixed. The dealer will give you a new manifold and it wont mount up to your down pipes/cat right and will leak. Muffler shops will resurface your manifolds and replace the bolts

 

[Daniel Ortiz]

@RAM208 you mention muffler shops will do a resurfacing job. Do you find that this is a reasonably prevalent task they know about and have done? I'm looking for someone in the Houston, TX area to do this for me (whenever mine warp), and if a good muffler shop has the experience and know-how, that may be my best bet.

 

[DILLIGAF]

How do I know if it is exhaust manifolds leaking due to broken bolts or lifter problems?

Well you open your hood and look for broken bolts is the first step

 

[Runaround]

@RAM208 you mention muffler shops will do a resurfacing job. Do you find that this is a reasonably prevalent task they know about and have done? I'm looking for someone in the Houston, TX area to do this for me (whenever mine warp), and if a good muffler shop has the experience and know-how, that may be my best bet.

I work for a metal fabrication shop and it makes sense to me to have your old manifolds surface because they have already done all of the warping they are going to do.
Putting new ones on, they will be prone to warping.
A machine shop can resurface them.

 

[Oliver Closehauf]

I'm surprised nobody has created a thick lead crushable gasket so you don't have to deal with milling.