fergy12 Posted October 31, 2009 Share Posted October 31, 2009 Ive got a 6.4L with a ticking noise you can hear through the wheelwells and is most prominant under the vehicle at the rear of the engine/bell housing area. vehicle ran fine besides an injector miss on #2 which i replaced the injector, manual compression all ok. Now attempt 1 led me to find a bent/broken #8 intake pushrod, a mushroomed intake valve and piston to valve contact on cylinder #8. Piston potrusion was ok so i installed a piston, head, 2 lifters, all rocker arms, pushrods, front cover and water pump (cavitated). Retested... noise was still there. Next try had be replace the short block, so replaced that and noise is once again still present. It sounds like it is coming from the middle of the engine at the rear and gets louder as it warms up. When you rev it up it increases as well, sounding like a ratchet sound. Injector cancelling makes no difference, and the FSE is leaning me towards it being normal as per the noise TSB. But i believe it to be extreme (can hear it with windows rolled up in the cab) and haven't heard any other truck make this noise, and if it was that noise it should have changed somewhat with the new short block installed you would think. Anyway have you run across high pressure pumps making noise? All thats left is the RH head and high pressure pump. And when the customer comes back i will definately be pulling the trans to make sure thats not it. Quote Link to comment Share on other sites More sharing options...
Aaron Posted October 31, 2009 Share Posted October 31, 2009 Wasn't there something awhile back on here about someone with a HPFP that the geartrain wasn't right on causing a horrific knocking noise, something like what you are describing? Quote Link to comment Share on other sites More sharing options...
Jeff Clyde Posted October 31, 2009 Share Posted October 31, 2009 Have seen rocker arm bridges pitted along with rocker arms where bridge contact is made cause a similar noise. Changed valve travel just enough to make the noise, but comp test and cutout tests showed everything ok. Good luck Quote Link to comment Share on other sites More sharing options...
fergy12 Posted October 31, 2009 Author Share Posted October 31, 2009 Hotline told me about teeth missing on crank/camshaft gears but no teeth were found damaged or missing. as for the HPFP geartrain not being right i'll look around and see if i can find anything. I changed the complete rocker arm assemblies including mounting bar due to the picots being partially seized as well. Quote Link to comment Share on other sites More sharing options...
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