HX35 Gas producer garrett style

[notjet]

Hi guys,

I have been trying to launch this build thread for some time now, but currently there are some huge school projects i have to prioritize, which is why i am starting it now to just finally get it of my list...

Some background:

Im a Dutch Student living in Switzerland for about 2.5 years now. I have experience wrenching around on small vehicles and machines but not really alot fabricating.

This year of school all who chose to do Projekten Recherche (building stuff instead of music or drawing lessons) are tasked with planning, building and documenting their Project.

Since i was always fascinated by jet engines as a kid (fueled by my father who took me to all these engine shows) i decided now was the time...

The Engine:

It will be a Garrett gtcp style gas producer with a HX35 as a core, keeping the original turbine and compressor housing but i plan to modify them by removing the turbine flange (ft will b kept in place by housing) and shorting the comp outlet so i can fit it all in a nice round housing

How i will do this all exactly will probably change as i go along but i like to have some kind of plan.

I will use an annular flametube with 10 evap tubes and i plan to just run it propane until testing is done...

Here are some images of the Turbo:

I consider it a good buy for where im located. I ended up paying 165 for the turbo (school pays 50 so actually 115) it doesnt really have any shaft play, core seems practically brand new so im happy with that

As you can see the inside if fairly clean (tho i already did some minor cleaning)

It will be some time until i post here again as im still gathering materials and working on my school projects at the same time

cheers, Neo

[notjet]

Oh i forgot to mention: the turbine bolts and housing are totally seized..

do any of you have some good tricks t get those off? I tried soaking in wd40 but somehow that doesnt seem to do anything so far...

Cheers, Neo

[notjet]

Hi guys,

I have some questions regarding the Oil pump, im wondering what kind pressure i need since i cant find any manuals for my HX35.

I found this marco pump online and wonder if its good enough, it says 1,5 bar pressure... 

www.ebay.de/itm/112146372269

Cheers, Neo

[racket]

Hi Neo

You may need some heat on the bolts as well as the WD40 .

The turbo needs at least the same oil pressure as it had on the engine it came off , 1.5 Bar isn't enough , 2 Bar might be OK for low power settings , but at least 3 Bar for higher ones .

Cheers
John

[turbinenjoe]

Dec 11, 2022 15:47:03 GMT -5 notjet said:

Oh i forgot to mention: the turbine bolts and housing are totally seized..

do any of you have some good tricks t get those off? I tried soaking in wd40 but somehow that doesnt seem to do anything so far...

Cheers, Neo

Have you managed to get them loose?

Are the bolts to tight to turn or are the heads round and fucked up?

Do you have a welder? It always worked out for me to weld a Nut on the head of the bolt. The heat of the welder is usually sufficient to loosen the stuck bolt. And you can also use the hex head of the nut if the original bolt is already screwed.

To get off the housing you can gently tap its back side (the side that is closer to the core) with a hammer while holding the turbo suspended in air. But be carefull to hit it gently in two or three opposing positions. Otherwise the housing can tilt so much that the inner wall bridges the clearance/gap to the blades of the turbine and bend them.

regards,
Matthias

[turboron]

Neo, my experience for removing stuck turbocharger turbine bolts is to heat them with a propane or MAPP torch until they are red hot and then let them cool to room temperature. Repeat twice for a total of three times. Once this is done you can back off the bolts with a wrench and a hammer. When the bolts are loose you can use them as jack screws to apply a load to the struck housing. At his point, I suspend the turbocharger on a chain hoist by the compressor end BS Heat the housing with the torch. Now you can use a punch and a hammer to free the turbine housing. Good luck. Be patient.

Thanks, Ron

[CMDR_Boom]

Yep, what that guy said. 😁
Heat is about the best option after lube doesn't work, and if all else fails, cutting it off is the best, last resort. Fortunately for us, having surrounding ancillary equipment isn't as much an issue so using a hot torch isn't a problem, but when you do work on tightly packaged generators, cars, trucks, etc., my go-to tool is an electric bolt induction heater. It only heats the bolt head and a small surrounding area, so if you have coolant, electrical or fuel lines in the way that would be more problematic to remove than deal with in place, voila! They have a lot of different brands anymore depending where you are in the world (one factory, many names kind of thing), but have gotten cheap enough that it's toolbox level to have one and not pay for torch gas all the time.

On the oil pump, having 40-60 psi with a decent feed rate is about as low as I would go for a turbo of any decent size and capacity regardless of what it came off of, as you might not always know 100% in like a salvage situation. There's a lot of relatively small and affordable pumps that can hit that rate, usually a smaller marine pump or a diesel transfer pump have been my pocketbook-friendly options (depending on quality, $25-65 US). That said, they will be a diaphragm style and last a fairly limited length of time, though probably fine for as little run time as these engines get. IF you want a one and done, aka cry once buy once, rotary vane is the way to go that will last.

[finiteparts]

Holset service manuals can be found online and they tell you exactly what the lubrication requirements are.

Here is the HX35 lube requirements that are shown on the installation page of the service manual:





Good luck!

Chris

[notjet]

Hi guys
Please excuse my late reply, ive been unable to respond for some time but my burner arrived and ill be updating you guys on the state of the turbine housing soon. Everything is in fine condition its just stuck but i soaked it in wd40 for days now and with some heat i really cant see myself fail...


Cheers, Neo

[turboron]

Neo, that is the sprit. If there is a will there is a way.

Thanks, Ron

[notjet]

Hi guys,

Got my burner up and running but the thing is a literal hazard, sometimes going full throttle flame mode by just moving it so i will set up a safe space tomorrow to remove the housing bolts..
I did however bend the snap ring tabs so i can put it on again which is nice and atleast another step forward

Cheers, Neo

[slittlewing]

Hi neo

Assuming the bolts are out, try this

jetandturbineowners.proboards.com/post/22852/thread

Cheers

Scott

[notjet]

Hi guys,

I damaged my turbo while trying to remove the turb housing so i had lost hope. It didnt turn smoothly anymore and i couldnt afford a new turbo so i lost motivation and just left it...

However, im back at it again and the jet is going to end up a bit differently from the original garrett style layout...

Ill update you soon (with puctures aswell) about all of this since i really want to get it done before school ends...

Greetings, Neo

[notjet]

Hello all,

I have a question regarding the oil system. I want to use an audi power steering pump as an oil pump but i am quite clueless as to how I install it. I would appreciate it very much if you can tell me what bits qnd pieces i need.

Greetings, Neo

[racket]

Hi Neo

That might be a hard question to answer :-(

Are you going to use mains power or 12 volt ??

Do you want direct drive or belt drive with pullies ??

What does an Audi PS pump even look like ??

What are its internal controls ??

Cheers
John