best way to bleed a turbo's oil lines (twisted)

[Mod800R]

hey all,

took my turbo off to change the oil and do some maintance, and was wondering whats the best methoid to beed the turbos oil lines and pump?

was thining

-filling the lines with oil
-filling the turbo with oil
and bleed the pump (pump fully open) with the machine running...

also, how much 5w30 does a m8 race gas extreme turbo oil tank take?

thanks alot
paul

 

[hatchers]

are you just doing this for annual maintenance?


me?.....remove most of the oil in the res. and fill here up as needed.....look in down the top fill port with a flash light, notice the angled tube that is welded on the outer wall, the opening at the bottom should be half submerged in in oil

snowstar can explain this better

 

[Tonysnoo]

I 'T'ed in a standard fuel primer in the oil pump supply line and the output line right at the pump. You can just pump away and fill the whole system as well as pressure up the turbo. Its surprizing how fast you can bleed/fill the system with the primer.

I generally give it a pump after I shut the motor off while the turbo is spinning down. I'm thinking it's not neccesary but it's piece of mind for me.

I get funny looks cause I have two primers(one for fuel) on my dash.

 

[UPandOVER]

I used a large 50 cc plastic syringe and attached a piece of plastic gas line to syphon the oil out. I would leave a bit in the bottom like Hatchers mentioned so that you don't have to bleed the oil lines again. Then fill to the tube location mentioned.

 

[Dano702]

I put in about 1/2 to 3/4 of a quart of Mobil 1 0w-20. I also have the feed line spliced to run a filter . I run it for the first few rides to make sure nothing got in the tank when i changed the oil . Then i go back to no filter , after i feel safe.


Get a buddy to help , you need one guy with his finger on the compressor wheel to keep it from turning while the sled is running. It takes a long time to get the oil to the top of the compressor , even with the cam arm on the pump locked in the wide open position.


I wrap the line in paper towels and hold it at install height , and fill the tube over and over . After a while it will be pumping all the way up to where it mounts on the turbo .

After that i install the tube and let the pump lube the bearings for a few . Never let the wheel spin untill you confirm there is oil all the way to the compressor. And if you run a filter change it often , or just take it off after a few rides.

 

[Dano702]

I 'T'ed in a standard fuel primer in the oil pump supply line and the output line right at the pump. You can just pump away and fill the whole system as well as pressure up the turbo. Its surprizing how fast you can bleed/fill the system with the primer.

I generally give it a pump after I shut the motor off while the turbo is spinning down. I'm thinking it's not neccesary but it's piece of mind for me.

I get funny looks cause I have two primers(one for fuel) on my dash.

Really cool idea Tony ! I am stealing that one for sure . Vintage AC parts must look cool on an M. I remember the one on my Panther.

 

[Mod800R]

thanks alot for the filter and primer tips!

awesome guys!!!

 

[Snowstar]

Sounds like you got it already. Good advice on here. Like said when I am only servicing the oil I suck it out of the oil tank and refill with 1/2 quart. If you have to pull oil lines for service and have the throttle bodies off, there is a 10mm head bolt on the front of the oil pump, if you pull that bolt out with the oil tank full that will prime the line from tank to pump and make bleeding the turbo feed line much faster. From there you can start the sled and either have someone hold the compressor wheel from spinning (wear gloves, if it backfires on start up it will suck your finger in and take a chunk off, personal experience) or use cheap oil can luber fitted to the turbo and manually pump oil to the turbo as the feed line primes.

 

[Mod800R]

thanks snowstar!

am going to be bleeding it this evening, and with all your help i am sure it will be done correctly!

am hoping to get a gauge or light for my oil pump feeding rate asap...alot cheaper than a turbo! lol

 

[Dunatic]

From there you can start the sled and either have someone hold the compressor wheel from spinning (wear gloves, if it backfires on start up it will suck your finger in and take a chunk off, personal experience)

I had that happen to me! dang that hurt

 

[Tonysnoo]

This doesn't really pertain to the question, but I thought this might be of interest.

When I was testing oil pumps for flow I found the injector pump pumps about 1/2 of a cap full out of the bottom port that went to the case for every 4-6 oz that flow out of the two main ports.

I just left the bottom line hooked up to the crankcase to oil the shaft and gears. I use Mobil I, 0-20.

I "use" about 1-2 oz of oil every ride. I just top the tank off every two or three rides and I'm hoping that I may not need to service the oil if I constantly use it up?????

I used to use a grease zerk on a blank plate, but this is way easier and I haven't seen any adverse effects. What are your thoughts on this scheme?

Sorry to hijack the thread.

 

[Mod800R]

am not having any luck!

am thing to get oil to the injector pump without any luck, 10mm bolt is out of the pump...and i even blew in the tank to build some pressure, but no go...could it be the pump is ty wrapped wide open? would i have to let the lever go to get oil through it?

there is a inline filter too...

also, do you guys run the pump wide open for the turbo?>

and the inlet for the oil is on top of the turbo with a 9/16 fitting...?

looks like the coolant lines are the larger fitting and go horizontal across the turbo...

thanks alot..

 

[Snowstar]

It takes a little longer for oil to get to the pump with a filter but it will go as long as the filter isnt plugged. Try applying some pressure to the oil tank to force the oil to the pump.

 

[Mod800R]

hey snowstar,

got it done now just took longer than expected...3-4 times till the engine got warm then cooldown...roughly 10min

we used a funnel over the line and filled the funnel with oil...then as it bled bubbles came to the surface...when the bubbles stopped, we then cleaned the line and wraped it with a paper towel...and sure enough it was pumping a small amount of oil steady...

then i filled the turbo itself with oil and hooked on the line as it was still pumping...after a couple of seconds i tightened the line fully...and let the turbine spin...

perfect...cant thank you guys enough...

the filter was on the machine when i bought it...should i remove it after a few rides?

i used 5w20 mibile 1 oil...

 

[Snowstar]

I would leave the filter in and just replace it every year.

 

[Mod800R]

sounds good,

am gonna get a primer ordered up and a new filter...

summertime mods...

anyone have a link to install a gauge or light to check keep an eye on the oil pumps operation?

 

[Mod800R]

also, how much play should there be in the turbo bearings?

 

[Snowstar]

I little play is normal as long as the fins dont touch the housing.

 

[hatchers]

also, how much play should there be in the turbo bearings?

more then you would think.....had my hands on a bad cartridge a couple weeks ago....you could hear the oil/air seal grinding, this was from too muhc oil pressure applied to the turbo and pushing oil across the seal......this wont happen on a twisted setup

 

[Mod800R]

great info guys, mine a little play but nothing dangerous...

guess the sled oil pump on wide open pumps at a good rate...very interesting...