My turbos have about 40k miles on them. I'm running high boost so they're about done. I'm getting lots of lag and my primaries are coming on very late. I probably have some cracks on em as well. Can I rebuild a turbo thats as bad as these? especially if they have cracks on them? If so how and how much?

 

Contact BNR. click their banner taht you see on top of this page to get there contact info.\

 

You should take them to BNR and have them checked out .

 

Unless you're into needlessly spending money, why not do a little detective work and diagnose exactly why "...getting lots of lag and my primaries are coming on very late." I suspect that the solenoid located under your intake and above the secondary fuel rail may be on the way out.... You didn't define "High Boost" so, I can't speak to that... but try checking that solenoid out with an Ohm meter.... should read about 30 to 40 as memory serves... but as it goes bad.. it's a gradual deterioration from heat soaking, it's resistance shoots up to 300 to 400 and funking things happen to boost and turbo spool up... Also,,, try pulling your heat shields and checking that you not lost a retainer clip for the waste-gate controller linkage rod or the pre-controller linkage rod... just a thought

 

BTW... the High resistance reading on that solenoid only shows up when the solenoid is HOT.... When cool... the readings are normal...

 

Generally speaking, if the exhaust manifolds are severely cracked, it will be very difficult to weld/fill the cracks without failure soon thereafter. The carbon seals used on the inside of the turbine are hard to find nowadays and rebuilders have a nasty habit of re-using your old ones. Old, heat-fried carbon seals will leak oil forever-and-ever. Furthermore, a lot of turbo rebuilders are not that familiar with the HT-12's and/or are used to big diesel turbos, so they skimp over the really important things ... like glass-beading the compressor housing tunnels, sanding down the surfaces, and PROPERLY balancing the turbine assemblies.

It's not cost effective getting your turbos rebuilt. They will inevitably fail ... probably within the first six months. Drop $900-1500 every 6-12 months -OR- buy some brand new turbos (~$3500) and not have to worry about this for the next 5-6 years. Also, what is high boost? .... 15, 16, 18, 20psi? I assume you already know this, but the HT-12's efficiency range bottoms out at around 16psi. Running them at higher boost only wears them out faster.

 

for david HIgh boost = 17+ PSi

 

I went through this (at 40k miles too!) and the bottom line is you won't know if they're rebuildable until they're disassembled. You can look at the housings and see no cracks from the outside but still have cracks on the inside. Obviously if you have no cracks then you're ok, and the iffy area is when you have small ones. If they aren't leaking any oil or smoking, and its just an issue of boost response, I would venture that they are fine and its the control system.

 

Damn! Someones just gonna have to lend me about $3500 Any takers?