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hemi knocking on startup

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Old May 16, 2012 | 12:11 AM
  #11  
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The oil filter causes lifter noise on cold start. Not the oil. Use a QUALITY filter or a factory and lifter noise should stop.
 
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Old May 16, 2012 | 07:49 AM
  #12  
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Originally Posted by LU229
You might have a couple exhaust manifold bolts broken - Typical, and under warranty.
Once the exhaust manifold heats up, the leak close`s up...hence noise goes away.

Just food for thought:
What synthetic oil & oil filter are you using...? How many miles before you change the oil & filter...? I myself switched to valvoline syn-power 5w20 and i always use the factory MOPAR oil filter, since switching oil`s, i no longer have noise`s on cold starts, nore do i have anymore noise`s after my truck sits for a few days and then start it for the first time. I wont say what synthetic oil i use to use before i switched to valvoline because i dont want to start ANOTHER oil war in here on the forums again. If you use cheap oil filters, the anti-drian back valve in the filter might not be doing its job, or worse yet, not even have a anti-drain back valve in it. This allows the oil to return back down to the oil pan. Then it takes a few seconds to get oil back up thru to the topend of the motor, .......etc etc etc.
I agree, check your manifold edges for soot.

I dont get why people will pay top dollar for oils like RP, Amsoil...etc and use cheap basic oil filters??? Atleast your using what goes on sale or Valvoline... I do to.

I've read alot of information on oil filters from multiple sites and have spoke to a couple of wholesalers regarding oil filters and makers.
Mopar filter is nothing special. Made by Purolator, Wix or Champion Labs whoever is the cheapest at the quarterly purchase or when ever a purchase is made(batches) I'm not saying they suck, but your getting the same filter from the dealer as you can get at the Parts store.
Also, since it's made by the cheapest bidder, this means Paper media and not Synthetic media.
I only use filters with Synthetic media because of their filtering capabilities. They include:
Purolator PureOne
Bosch
Mobil 1
K&N
They are Purolator and Champion Labs made and have the highest filtering largest sq/in of media for maximum filtering capabilities.
Synthetic media fiber is much more dense and grabs many more particles that are much smaller in size. You could technically drive longer with one of these filters, certainly till 7.5kmi where as stock Mopar filter I wouldn't drive past 3-4kmi with.

You want to stay away from Fram. Most other filters are descent. The ONLY downside I can see in using Synthetic media fibered filters is a slight reduce in oil pressure. Would only make sense because of the difference in material that has smaller "orifices" along with more media packed into the same size can. Ofcourse this is all speculation and unproven, my truck will "tick" at idle. Once I bring the rpms up to 950rpm or so, the ticking goes away completely. Odd though, many other 3rd Gen guys say the same thing, so whether it's the Low flow Oil pump(5-6psi at idle) or the filter, I dont know and dont care to put on a stock filter until my next oil change to find out(very soon). Haven't had any cold start-up issue's and my truck always sits for 3-4weeks at a clip, so I've experienced a ton of dry/cold start-ups. I have not had any issue's with Synthetic media on all my other vehicles...ever..
They simply filter better and last longer. end of story
Originally Posted by Huntjunkie41
Are you using 5W-20 Dyno or Synthetic oil? Some guys out west in the hotter climate use 10 weight oils.
This doesn't matter. 5w-20 dino oil and 5w-20 Syhtetic oil both have the same viscosity ratings. They perform all the same. One just provides better protection.
Also, if it's 100*F out, chances are your engine oil temperature is in the 80*+ degree range. A 5w-20 oil isn't going to be a 5w at those temps. More like the 10 you reccomend. Only difference is that 10w won't go any "thinner" than 10w at really cold temps.
 

Last edited by dirtydog; May 16, 2012 at 08:00 AM. Reason: added comment
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Old May 16, 2012 | 07:53 AM
  #13  
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Default Here we go again

Originally Posted by hounddogg
The oil filter causes lifter noise on cold start. Not the oil. Use a QUALITY filter or a factory and lifter noise should stop.
Inferior oil cant cause engines to be noisy...??? I sooooo STRONGLY disagree...!!!
 
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Old May 16, 2012 | 08:14 AM
  #14  
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If its the correct spec 5w20 it won't! No matter who's oil. So what do you call inferior oil? Non detergent 30wt? 20w50? 10 year old 10w40? If so you are correct.
 
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Old May 16, 2012 | 08:30 AM
  #15  
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Originally Posted by dirtydog
I agree, check your manifold edges for soot.

I dont get why people will pay top dollar for oils like RP, Amsoil...etc and use cheap basic oil filters??? Atleast your using what goes on sale or Valvoline... I do to.

I've read alot of information on oil filters from multiple sites and have spoke to a couple of wholesalers regarding oil filters and makers.
Mopar filter is nothing special. Made by Purolator, Wix or Champion Labs whoever is the cheapest at the quarterly purchase or when ever a purchase is made(batches) I'm not saying they suck, but your getting the same filter from the dealer as you can get at the Parts store.
Also, since it's made by the cheapest bidder, this means Paper media and not Synthetic media.
I only use filters with Synthetic media because of their filtering capabilities. They include:
Purolator PureOne
Bosch
Mobil 1
K&N
They are Purolator and Champion Labs made and have the highest filtering largest sq/in of media for maximum filtering capabilities.
Synthetic media fiber is much more dense and grabs many more particles that are much smaller in size. You could technically drive longer with one of these filters, certainly till 7.5kmi where as stock Mopar filter I wouldn't drive past 3-4kmi with.

You want to stay away from Fram. Most other filters are descent. The ONLY downside I can see in using Synthetic media fibered filters is a slight reduce in oil pressure. Would only make sense because of the difference in material that has smaller "orifices" along with more media packed into the same size can. Ofcourse this is all speculation and unproven, my truck will "tick" at idle. Once I bring the rpms up to 950rpm or so, the ticking goes away completely. Odd though, many other 3rd Gen guys say the same thing, so whether it's the Low flow Oil pump(5-6psi at idle) or the filter, I dont know and dont care to put on a stock filter until my next oil change to find out(very soon). Haven't had any cold start-up issue's and my truck always sits for 3-4weeks at a clip, so I've experienced a ton of dry/cold start-ups. I have not had any issue's with Synthetic media on all my other vehicles...ever..
They simply filter better and last longer. end of story

This doesn't matter. 5w-20 dino oil and 5w-20 Syhtetic oil both have the same viscosity ratings. They perform all the same. One just provides better protection.
Also, if it's 100*F out, chances are your engine oil temperature is in the 80*+ degree range. A 5w-20 oil isn't going to be a 5w at those temps. More like the 10 you reccomend. Only difference is that 10w won't go any "thinner" than 10w at really cold temps.
Mopar factory oil filters:
If people are still under their 5yr/1000,000 drivetrain warranty period, why would "you/they" take the chance of voiding it by using aftermarket oil filters. The factory mopar oil filters work just fine with synthetic oil. Some chrysler vehicles come thru with synthetic oil in them right from the factory. When i turned wrenchs in dealerships for 30+ yrs and had a vehicle come in with a faulty engine, if it had an aftermarket oil filter, the distirct rep`s would NOT approve to pay for it under warranty, customer was instantly on their own to pay the complete bill. I`m sure this still happens today, if not more stringent. I dont want to give them an excuse NOT to repair my truck if it should ever need it, so i use ONLY the factory oil filters. If they were THAT bad of a filter, chrysler wouldnt use them because they dont want to pay for an engine seizing up out of their pocket.

Synthetic oil filters:
You`ll have a slight loss in FLOW, not PRESSURE...!
Loss in "oil flow" is worse than having low oil pressure.

"end of story"
 
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Old May 16, 2012 | 09:27 AM
  #16  
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I am not going to get into the whole oil thing, but it depends on how "loud" the tick is too. I use 5w-20 castrol synthetic with the factory filter, and I hear a SLIGHT tick. But as far as my understanding goes that is the illusive "hemi tick" You really only hear it if your paying close attention, and on the warm days when the fan kicks in you can't hear it at all. This is something within the build of the Hemi, but I have been told its nothing to worry about. Its done it on my truck since day 1 (5kms!) my old 07 also did this. I will also add that it does this most of the time, not just on engine start-up.

Now if it seems louder then what I was stating then yes I would check into getting those bolts looked at. I could be wrong, but my truck has done this since day 1, so chances of those bolts being broken out of the factory are slim to none...
 
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Old May 16, 2012 | 09:51 AM
  #17  
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Originally Posted by LU229
Mopar factory oil filters:
If people are still under their 5yr/1000,000 drivetrain warranty period, why would "you/they" take the chance of voiding it by using aftermarket oil filters. The factory mopar oil filters work just fine with synthetic oil. Some chrysler vehicles come thru with synthetic oil in them right from the factory. When i turned wrenchs in dealerships for 30+ yrs and had a vehicle come in with a faulty engine, if it had an aftermarket oil filter, the distirct rep`s would NOT approve to pay for it under warranty, customer was instantly on their own to pay the complete bill. I`m sure this still happens today, if not more stringent. I dont want to give them an excuse NOT to repair my truck if it should ever need it, so i use ONLY the factory oil filters. If they were THAT bad of a filter, chrysler wouldnt use them because they dont want to pay for an engine seizing up out of their pocket.

Synthetic oil filters:
You`ll have a slight loss in FLOW, not PRESSURE...!
Loss in "oil flow" is worse than having low oil pressure.

"end of story"

This is the dumbest thing I've ever heard. You cannot void your warranty by aftermarket oil filter. That's like saying you'll void warranty for aftermarket oil...rofl The ONLY WAY is if they prove the filter caused the issue!
Sounds like a total dink move to me unless they can prove that was the issue. Magnuson-Moss act.

I knew exactly what I meant. BUT, the slight loss in flow directly impacts the pressure on the opposite side of the filter. Flow is directly proportional to the Square root of the differential pressure(differential pressure being the difference on each side of the filter)
 
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Old May 17, 2012 | 11:02 AM
  #18  
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Originally Posted by dirtydog
This is the dumbest thing I've ever heard. You cannot void your warranty by aftermarket oil filter. That's like saying you'll void warranty for aftermarket oil...rofl The ONLY WAY is if they prove the filter caused the issue!
Sounds like a total dink move to me unless they can prove that was the issue. Magnuson-Moss act.

I knew exactly what I meant. BUT, the slight loss in flow directly impacts the pressure on the opposite side of the filter. Flow is directly proportional to the Square root of the differential pressure(differential pressure being the difference on each side of the filter)

Rich, come on man, you know as well as i do that ther are way more junk oil filters out there on the market today than ther is, bad oil. You have no clue of what i`ve seen in 30+ yrs wrenching in dealerships that factory rep`s will do and what they are capable of. As for oil flow vs oil pressure, whatever dude, i`m not going to go any firther with this particular debate.

To get back to the original OP`s noise....
I`ve heard some fuel injectors be kind of loud/noisey, some people may make the mistake thinkin they have lifter clatter when it MIGHT be just loud injectors.
 
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Old May 17, 2012 | 12:54 PM
  #19  
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My 09 has just under 90K on it now. Had a ticking noise on startup about 30K miles ago. Turned out to be the manifold bolts, which were a known issue and had been listed as a recall item. Take it into the dealer. They can tell you quick if that's it or not.
 
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Old May 14, 2013 | 04:04 PM
  #20  
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Default Ditto on the exhaust

Originally Posted by wenied
Guys,
I have a 2009 with the hemi and 49,000 miles on it.
Starting 2 weeks ago my engine makes noise when i start it.

It sounds like the lifters or valves tapping for about 30 seconds after a cold start. I changed the oil and the sound is still there upon startup.

I first noticed this after my truck sat at the airport for two weeks. The first time starting after two weeks seemed reasonable to have noise but now it does it every single time i start it. Any ideas?

****I am having the same exact problem with my pick-up truck: 2009 Ram Hemi 1500 TRX4. My truck has 49,600 miles on the odometer. It's become obvious [especially on the cold start up] in the last 24-hours that I have an exhaust leak. I'm hoping exhaust manifold bolts are an easy fix as purported to be the problem itself.
 
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