HX-35 Bites the Dust

[Partyat33]

The combination of larger injectors and the PMAX3 was too much for the ole stock HX35.



I bought a new one from Piers and it comes with instructions. Understanding that my mechanical experience is pretty limited, if you have an tips or suggetstions please let me know.



Also if you could give an indication of duration to do the change that would help too.





Dennis

 

[Ramboy]

How much boost did it take to break it? I hit 45 lbs. on mine a few times before setting wastegate to 35. It's still going strong.

 

[Rob Thomas]

I'm also cuious, I hit 45-46#'s daily without problems. Yet!



Later, Rob

 

[Partyat33]

38 PSI killed it.

 

[Mark_Kendrick]

Bummer

Must have been a Monday morning turbo



A turbo change should take less than an hour with a COLD truck. Assuming that the cleanup after the old one is not extensive.

 

[DEZLPWR]

Yep....

You musta had a bad turbo from the factory... . 38psi should not have killed the turbo. Was that the highest it had ever hit?

 

[Briar Hopper]

Here's some tips, Dennis. The oil line fitting on top of the turbo has two o-rings in it. DO NOT LOSE THEM. The fitting will require a 17mm open-end wrench on the middle section, to hold it in place, while you use a 19mm wrench to break loose the oil line connection. Then you can remove the fitting to use on the new turbo. All the clamps I've found on the intake system of these trucks take an 11mm deep well socket (something you should keep with you in the truck at all times)The nuts on the turbo mounting bolts at the exhaust manifold flange can be a bear to break loose. Tap the free wrench end with a mallet, that'll break 'em loose.

When installing the new turbo, after running the nuts home on the mounting bolts, be very careful to line up the oil return line flange with the bottom flange on the turbo. The gasket can shift, a SMALL dab of Permatex blue will help hold it in place, but will make the whole process longer by 5 minutes as you wait for it to "tack". If the turbo halves are even slightly off in relation to each other, the oil return flange will not line up properly. This is critical, as these bolts are small, and strip out easy, or crossthread. If it's "off", you'll have to "clock" the turbo. It's easy to do. The bolts on the face of the exhaust housing that clamp down the two half moon clips will have to be loosened. (not removed!) then you can rotate the center section in relation to the exhaust housing. After the flange lines up, the outlet of the intake section on the turbo may not line up with the tube to the intercooler. So... a big pair of channelocks on the clamp behind the intake part of the turbo, squeeze the ring tabs together, without removing the ring, and youll be able to rotate the intake housing.

Of course, the 35 should be shipped to you perfectly in alignment, but I've never had any turbo that was, and I've changed a bunch of 'em ! If you get stuck, call me, I'll walk you through it.

 

[Partyat33]

Thanks for the Tips Tom. I might make it as a mechanic yet. Only 2. 5 hours to swap my injectors this time.



I'll be doing the swap today. Wish me luck



Dennis

 

[Mark_Kendrick]

hopefully that 2. 5hrs included a sixpack or 2



my wife wonders why an oil change takes all day and a case of Corona

 

[DHRA]

wisea$$

Originally posted by Briar Hopper

If you get stuck, call me, I'll walk you through it.

What kind of sick joke is that?

 

[Partyat33]

Gee only 5 and 1/2 hours to do the turbo. Course I did not have any instructions, well I do have a service manual, wonder if that would have helped. So far the PDR HX35 is running good. Still breaking it in before I break it.



Dennis