Should I rebuild or replace?? my hy35
 

Yeah I was tinkering on my truck some today. Decided to remove the intake into the turbo.. Well I discovered some play in the shaft. up and down play. How much play can there be before it gets into the housing and causing it to be junk?
Looking for experience on this type of fix. Usually when the bushing are replaced, it should take care of the play. seeing they are brass, and the shaft being steel??
opinions and advice please.

there will always be up and down play. the turbine rides on a film of oil. if it were super tight the charger would last about 30 seconds. chances are your charger is fine. but if it does decide to go capput get rid of that little thing and put an air mover on your truck.

I'd say just do a hx35w swap. That's a pretty common fairly cheap swap. I take it you have an auto?

Yes I have an auto. I'm looking for a different turbo. If I knew of a HX35w for sale cheap. I'd swap it out.
Back to my turbo, how much movement is OK?? i was looking into reasons why my truck will only build 17 psi at wot with the comp on 5x5. I'm thinking the wastegate may be stuck open or opening to soon. possible interecooler tubing boots may be leaking..

check your wastegate for proper function. but even with a stuck open gate with a good box eventually you should see more boost than that. how is your fuel pressure? if you are sucking the lines dry you are begging for a new vp44 and will have sub par power until you kill the pump. personally i would not call an hx35 an upgrade over an hy. they are nearly the same beast. i would always perfer the hx over the hy but not waste my money swapping them out for one another. and if you can grab hold of the compressor and push it side to side while spinning it and never get it to touch its usable. from what your are saying about your charger it is in fine working order.

My fuel pressure is about 18psi at idle, it'll drop to the lowest I've seen it 15psi at WOT.

So take a hold of the compressor spin it while pushing on it to see if the blades are actually touchy. OK I will do that. OK, Know let me ask this, Should I be able to grab a hold of the waste gate rod and move it at all? I did just that awhile ago and couldn't move it. reason I am thinking it may be not working properly.

My truck has 234K on the clock, I'm not sure 100% how much the PO did do it. I know I should adjust the valves. I wondering if the low boost PSI how bad that is efecting my overall MPG.

BarryB ive also got the hy35 and with my edge juice on 5 at wot i can hit 33psi with it. what about swapping to an he351?? dont know how much better it is than a hx35 but have seen plenty of guys do it

no, you should absolutely not be able to move the wastegate rod. test it with regulated air. it should open around 20psi. if you have an adjustable rod make the linkage shorter so that the gate stays closed longer to gain boost. a 351 is a much better charger but its not quite a bolt on. you will have to spend a little more on adapters and build a charger pipe.

if you have an hy35 you will want to pre load the wastegate with a turnbuckle.

We have some take off hx35's in good condition.

I'm thinking, after reading the the post here. I will remove my turbo, do an over all assessment. If it could use new bushings, bearings, Another thing that has me concerned is the amount of oil residue on the intake opening. also give the waste gate a good look and test also.

Jkidd, so what do you ask for a good hx35??

oil residue is probably from your oiled air filter. should never EVER run an oiled air filter on a turbocharged truck.

Really? Ive never heard that before. What type of filter should I use. This set up was on my truck when I bought it. And dang it, I just cleaned and re oiled the thing. LOL!

AFE makes dry filters. I believe jacob from DAP also carries the dry filters.

basically unlike the average turbo gasser, a turbo diesel makes a significantly greater amount of boost and sucks HARD on air filters...well lets use this as an example...what happens when you suck on a wet rag or towel? the water comes out! well same thing happens with oiled filters when enough suction is put on them...your turbo quite literally sucks the oil right out of the filter which gunks up the turbo compressor with oil and lets dirt through.

http://a.cdnbrm.com/images/products/...nt_filters.jpg

so you can use the same style filter, just don't want the oiled ones on a turbo diesel or any forced induction vehicle really..

I think what I can do is then. Take my filter off
clean it out really well. Then purchase a pre filter for it. I dont live in real dusty area. Also my truck is not a daily driver.

amsoil makes a really good nano fiber filter that is dry from day one. We also have a pre filter that will keep all the big dirt and bugs out of your element. I let one get too full of oil from an oil leak once and collapsed it, but I let maintenance go for too long

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I would probably still get rid of that sorry a$$ hy35. I like my hybrid really well. I push about 40 psi

Wondering if someone could tell me, If I set my dial indicator up on the shaft. How much play is acceptable? I can move quite a bit in my opinion. It seems to spin fine, with no interference. But I would like to double check before I decide not to rebuild just yet.

disassemble your charger. measure ID and OD of the bearings. compare those numbers to a new bearing. measure your turbine shaft. check your shaft for roundness. they normally are fine unless they have made contact. i believe the HY and HE351 use the same rebuild kit. there is an extra oil groove in the thrust bearing, possibly a little bit different alignment pin location as well compared to the hx30-40 kit. if its not puking oil than there is a very high likely hood that it is perfectly fine. with lots of shaft play comes worn piston rings and worn piston rings allow oil to pass by which gunks things up. so no gunk means good rings. good rings means no shaft play and no shaft play in that little bugger means run it harder you arn't trying hard enough. LOL hope that is what you are looking for. i think i have a set of STD he351 bearings laying under my bench. would you like me to measure them for you?

I haven't messed with my truck much. Been working alot and doing other projects.