2012 ram 2500 5.7 hemi tick

[Gueeda]

My truck recently had a misfire code come up I changed the coil and all spark plugs and still no fix. It has always had a little tick noise on cold starts. Also recently my gas mileage is thru the roof and I'm getting a little oil blowback in filter box but not burning any oil at all. We did a compression test on the cylinder in question "3" and it was about 115psi. My mechanic says the rings are shot but I'm looking for other suggestions.

 

[MADDOG]

What were the compression readings on the other cylinders? He may be right but I am not sure what the acceptable range is for the 5.7L

 

[Burla]

Search hemi tick this comes up weekly and so much info that doesn't need to be re-typed. If you still have questions after that post back here. Just curious, what oil have you used? Use top tier gas? Up on maintenance? How many miles? PCV ever changed? Blue smoke ever? Did you drop a cleaner down the spark plug hole? Drop a little tranny fluid in the spark plug hole, tranny fluid has the highest detergents. Run some redline s1 for a while as well.

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It is rare that Hemi tick would be rings, it seams to be lifter related in your case, or the other 1/2 of the time exhausts bolts. It may be you have lifter tick and also crud around the rings. Not related, two separate issues.

 

[Gueeda]

Full synthetic castrol

 

[Gueeda]

210000km

 

[Gueeda]

No smoke and doesn't burn oil

 

[Burla]

When you say your mechanic, how much do you trust the guy? How can he tell the ring is toast? And he thinks all the rings are toast?

If there is no smoke, the ring might be ok despite the lower psi. I would clean that cylinder with 1/2 ounce or so tranny oil right down the plug and run Redline S1 in your gas tank for a long time. Maybe some sea foam right in that hole after the tranny oil, and it will smoke on both of those but it is normal. Do tranny oil first let it burn off then maybe sea foam that, don't want to over load. Mise well do a sea foam all around as well, clean all of those.

That's a lot of miles, that isn't out of the realm of normal considering the ethanol gas's we use today, and if the pcv is clogged, I would certainly expect your syptoms. Castrol is good oil but you might want to search out high detergent PUP for a run just to hyper clean that. Have you changed your PCV? That might really likely be the culprit, should be changed every 45k or so give/take. You might escape this with a good cleaning strategy man. It is worth a shot because replacing even one ring is a fawk all type of job. I'd run a PEA cleaner in your gas tank from here on out. But that will stop future sludge buildup, you likely need to clean that piston head. I'd boroscope that piston.

You run a catch can? Another thing I'd do just so you know for a fact the pcv is flowing.

Gonna move up to 0w40 PUP? Penzoil Ultra Platinum, you may want to be thicker for a while to you solve it. I surely wouldn't be running 20 weight.

I'd still research Hemi Tick, but I would wager a burger king hot dog that you have two issues. Lifter tick is separate from what you got going on in that cylinder. Many guys on the board have solved this with running high moly oils, research it. GL, B

I checked something out and on this list a worn down cam is definitely a symptom downstream of lifter tick, and can cause your issue. The problem is again how do you diagnose that?