Keith Browning Posted September 23, 2008 Share Posted September 23, 2008 One of my techs is chasing a noise in a 2004 F350 6.0L. The "noise" sounds similar to a whining power steering pump but running the engine with the belt off disproved that. He originally thought it was the trans pump but the noise is not loud under the truck at all and three guys in the shop agree it is somewhere up top. We inspected the turbo and it had a bit of play in the shaft so he changed it thinking we had it. Nope. /forums/images/%%GRAEMLIN_URL%%/banghead.gif We suspect the HPOP maybe? Has anyone heard one of those make a noise like this? The Hot-Line suggested controlling the IPR so we did and I don't think there was enough of a change in the sound to be sure. I dont really see what else it could be... unless it is the trans after all. Eeesh! That would suck! /forums/images/%%GRAEMLIN_URL%%/eek.gif Quote Link to comment Share on other sites More sharing options...
mchan68 Posted September 24, 2008 Share Posted September 24, 2008 Can you upload a video clip of this sound with the engine running and the belt off? Quote Link to comment Share on other sites More sharing options...
Steve Mutter Posted September 24, 2008 Share Posted September 24, 2008 remove the torque converter,re install the trans and see if your noise goes away,that way you can rule out any kind of trans noise, just thinking out loud Quote Link to comment Share on other sites More sharing options...
iceman Posted September 24, 2008 Share Posted September 24, 2008 some how or another i remember reading something about hpop gear whine somewhere on the ford site. I have heard alot of trucks making this noise but they never complain Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted September 24, 2008 Author Share Posted September 24, 2008 The plan is to remove the trans today and run the truck. I expressed concern about running the engine without the torque converter bolted to the flex plate as its mass acts as a flywheel. According to the Hot-Line it can be done. I am curious as to how it will run. Quote Link to comment Share on other sites More sharing options...
GregH Posted September 24, 2008 Share Posted September 24, 2008 I had one that was whining, and it was caused by the high pressure pump. Sounded just like a power steering pump. Replaced the pump and all was well... Quote Link to comment Share on other sites More sharing options...
F350SD55 Posted September 24, 2008 Share Posted September 24, 2008 I have replaced one HPOP for a power steering type noise. It wasn't as loud as a power steering pump, but very simular. I don't remember what year truck was or any other details as this was a couple of years ago. Quote Link to comment Share on other sites More sharing options...
mchan68 Posted September 24, 2008 Share Posted September 24, 2008 The plan is to remove the trans today and run the truck. I expressed concern about running the engine without the torque converter bolted to the flex plate as its mass acts as a flywheel. According to the Hot-Line it can be done. I am curious as to how it will run.It is actually very easy to do, since the starter is bolted to the adapter as you are already aware. I did this awhile back, when one came in on the hook from a garage that misdiagnosed a failed starter. Removed the transmission and found the flexplate completely torn off the mating flange to the crank. Replace the flexplate, and ran the engine without the transmission bolted to it, to verify there wasn't any further damage done to it, before reinstalling the transmission. Quote Link to comment Share on other sites More sharing options...
Mekanik Posted September 25, 2008 Share Posted September 25, 2008 Keith, we had an ambulance with what I think was a whinning noise. It was not a constant noise. I think it was off idle, but it turned out to be the HP oil pump. /forums/images/%%GRAEMLIN_URL%%/2cents.gif Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted September 25, 2008 Author Share Posted September 25, 2008 It turned out to be the HPOP. Its the old style pump. With a little input from you guys and reasoning I recommended to the tech that we forgo the transmission removal and replace the pump. It even felt funny turning the gear by hand. I guess this is not as rare as I thought! Anyway, thanx for the input guys. /forums/images/%%GRAEMLIN_URL%%/notworthy.gif Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.