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Yeah I already came to that conclusion. I could only imagine how the Turbo sounds! It's just a really BAD sound and as far as I'm concerned NO internal combustion engine should make such a noise, but who am I to say. Thanks for the info

Yeah I found that AMG decoder system on the internet. I just didn't know how Retiredwarhorses knows the last character its a "M" I can't make it out for the life of me. It looks all messed up to me? I guess Retiredwarhorses has more experience and better eyes then me. Oh well it sound good to...

also what is the last character? I cant make it out. thanks

Oh I'm real! The value covers could have been swapped, you never know. It's not unheard of military guys cannibalizing parts! I'm just saying its in the realm of possibility but I agree it's highly unlikely. But enough of that, Can you tell me or direct me as to how you came up with this...

Got it. the numbers are not to eligible but heres what i can make out. 12- 05 (or 06) 11? Also in the valley it says 506 made up with all dots. Thinking its a Navistar cast? it should be because AM took over the 6.5 in yearly 2000 an the my engine has a GEP decal on the valve cover. Of course...

Yeah i also use rotella oil so i will switch brands just in case and just for a little more security i will pour in some lucas also. But speaking of 6.5 GEP's. In my local CL a guy is selling is Humvee and he states in his ad that his engine displacement is a 6.5 GEP and he even state the...

Awful is correct! yeah I have a 6.5 GEP Optimizer and she is loud!. It sounds like the top of the engine isn't getting any oil. I decided to do some testing of the Cold Advance solenoid (CAS) I unhooked 569a and 569b and placed them together and turned the Humvee to on/run position and then...

hey was just wondering if you came to an conclusion on the hamming during cold morning start up? I haven't yet.

Yeah, i will try that.

Yeah i just start it and wait i don't drive my rig until its warmed up and about 30 secs ( Give or take) It sounds like a normal diesel. The oil gauge comes up right away and it seems to clam down but don't know if thats just a coincidence? I'm from the old school and so i thought if the noise...

Thanks for the info. It sure does sound like heck! But this goes away in about 30 Secs, as soon as the oil gauge comes up to 60psi.

Really? It sure sounds like its hammering until the oil gauge gets up there? Oh well.Thanks fro the reply.

Hello. I should know this answer but I'm going to throw the question out there anyways. In the mornings my Rig Makes a pretty good noise and then it goes away after about 30 secs. The noise sounds like a machine gun or a maybe a fast knock then it goes away and she is fine all day until the next...