HX 35 Problems

[john krmpotic]

I recently installed an HX35 turbo on my 89. The truck is parked all winter as I only use it to pull my RV 5er. I have now taken it out for a test drive and am finding the intake horn is turning from the point where I indexed it. There is no apparent pressure on it. I have new motor mounts and transmission mounts. Rad hoses, exhaust pipe and pipe from intercooler to intake are giving no problem. Therefore I have no reason to suspect I have too much engine rock or movement. My old H1C never moved, however they were held with a V band clamp. I called the vendor and he suggested the snap-ring that holds the housing together is not fully seated from when I indexed it. I have checked it with a long punch as best I can on the truck and it appears to be fully seated. Today, I will remove it and get a better look. I was wondering if anyone else has had this problem, and if so what else can I look for? If I cannot see anything I will call the vendor again and see about exchanging it and try again. Other than that it works beautifully and spins up 35 on the boost gauge in a heartbeat. Thanks, John.

 

[Greenleaf]

Well, I installed a similar turbo last night, and it was not indexed. I had a tough time turning the compressor housing. That's a tough snap ring they got on there. Vice grips! The hose from the horn to the inter-cooler would also help hold this housing even if the snap ring won't. I'm just as as you are here. It would only move with the assistance of a large hammer. I would think.



-S

 

[john krmpotic]

Well I removed the turbo from the truck and the snap-ring appeared to be fully seated. So I removed the snap-ring and removed the snail. The o-ring appears to be undamaged and in the correct place. The only thing I see that holds this from turning is the crush from the o-ring pushing against the snap-ring to create enough resistance to stop turning. I reassembled the unit this time positioning the snap-ring opening away from the engine so it can be adjusted on the engine. I however will not reinstall it until after I speak with the supplier on Monday. He may have some other area to check that I have overlooked. Thanks, John.

 

[dpuckett]

You must have some BIG Vase GRips, Greenleaf. I had to use 12" ChannelLocks on mine to clock it up to the crossover. It is a bear to get just right sometimes.



John-

Try taking the snap ring off, and keep it off the impellar with the Vise Grips, what have you. Take a hammer and GENTLY tap the housing around the front side, and make sure it seats into where it is supposed to be. Put the snap rign back on. It should go right in. If not, I'm outta ideas without pictures.



Daniel

 

[BushWakr - RIP]

It is not too common to have the turbo "unclock" itself.

It is really something that would be a bit unusual. As noted above, the only real reason this would happen is if the snap ring is not fully seated.

I have "clocked" turbo's on other guy's trucks using a very sturdy set of needle nose pliers... very sturdy...

A few taps with a good sized rubber mallet and we're good to go.



Pb