HY35 going south?

[tmacc]

I was changing the oil last evening and as usual, since I take the rubber intake duct off, I spun the impeller. It felt kind of weird, so I grabbed the end of the shaft and moved it back and forth. It moved a lot. So, I got out the manual and looked up how to check it and here's what I got. Now I don't have the narrow feeler gauges like the book suggests, but w/ my reg. gauges when I pushed the shaft towards the housing I got . 008" feeler gauge in and when I pushed the shaft away from the housing I got a . 017" in. This was a little tough, but I was able to finese it. These mesurements could be off by no more than . 001" The difference of . 009" is outside the range of . 0128" to . 0195" that book says is the limit. It goes into the dealer on Tues. I have had problems getting the dealer to make warranty repairs in the past on my front end. (A long story, don't ask)Any suggestions from someone out there on how to approach this, since we probably know more about this than they do? The truck has 36K on it. Thanks in advance.

Tom

 

[SnoKing]

Check your math, . 009 is less than . 0128 the last time I checked. SNOKING

 

[tmacc]

Thank you, but my math is just fine.

Perhaps, I wasn't clear in my original message. The allowable range is . 0128" MIN. to . 0195" MAX. If it's outside of these specifications, which . 009" is, then the turbocharger assembly should be replaced. Page 11-16, section (5), sub-section (e), 2001 Ram Service Manual, Vol. 2.



I'm interprating this to mean, above the MAX or below the MIN. I'm not saying this makes complete sense. Let's say I got measurements of . 004" on the low side and . 021" on the high side. The difference of . 017" would put it in the allowable range, but it would seem to indicate that there is more bearing radial clearance. (wear, slop, or what ever you want to call it. ) This wouldn't be the first time that the manual is wrong either. Why not just say "If it's above the Max of . 0195", it needs to be replaced"?



I talked to another tdr member and he said that his was tight. No play at all. Anyone else want to put the ol' wiggle on their turbo to see what they find?

Thanks,

Tom

 

[Snow man]

On my 96,it was tight,and smooth,no play,my 2000 has the hx35 too,it is loose,it concerned me at first,but it hasnt affeted the performance. My dads '01 is little loose too,even with only 10K on it.

 

[SnoKing]

I would think that the range of . 0128" to . 0195 means the . 0128 would be the minimum and . 0195 is the max measurements. You must likely need wire gauges to do these measurements.



SNOKING

 

[Todd T]

we had a panic moment a few months back at a meet. one of the guys grabbed the turbine and felt that play and thought the same thing on his truck.



we checked four or five other trucks, and they all did it to some degree. his was an HY too.

 

[tmacc]

Snow King, The manual did recommend narrow feeler gauages or wire type feeler gauges. The wire type would be more accurate in this application. I just don't happen to own a set.

Todd T and Snow Man, your replies have relieved some of my concerns. Boost levels seem fine. I'll just keep an eye on it.

Thanks,

Tom

 

[tmacc]

Normal cond.

Just wanted to let others know that after taking the truck to the dealer and having the turbo checked, the tech came out (and this is a first) because he couldn't depend on the service writer to relay the info. The tech was a little puzzled about it too, because, normally when he gets a bad turbo, it is obviously bad and they just replace it. After feeling the play in the impeller, he called STAR and they said that the impeller relies on oil pressure to center it. W/ the engine not running there's no pressure, so there may some play. They told him that unless the impeller is rubbing the housing it's fine. Makes sense to me. Maybe one of the turbo gurus would contribute his $. 02 worth. Saw another post on this subject, so I'm not the only worry wart out there. LOL

Tom

 

[Snow man]

At least you know now,mine is is looser than I'd like too.