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post #1 of 17 (permalink) Old 10-12-2014, 05:43 PM Thread Starter
 
Join Date: May 2013
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Turbo issues

Got an issue with my turbo......probably self inflicted.

Our September trip went well but ended up with a brake problem where the rear caliper was hanging and caused enough heat to melt the seals in the caliper and losing brakes completely. The car was running great up to that point and when I realized that, I stopped the car and the brake rotor was glowing red and so was the turbo housing. I let it cool down and then limped it back to camp with no brakes.

So we just went on an October trip........I fixed the brakes and changed the oil. Made sure I had good oil pressure turning the motor over before ever firing it up. Upon taking it out for the first time, I soon knew there was a problem. The turbo made some squeaking noises and would not boost. I got out and looked things over and the housing was glowing red.

I removed the turbo and took it apart and it didn't have any indication of rubbing but did seam to have a slight catch in the rotation so I took it apart, cleaned up the shaft real good and installed a new bearing assy and it still screeched at rpm. I had already double checked and made sure it was oiling (gauge said 80psi) and the AFR looked good as well.......starts and runs fine.......the rotating assy just must not be free enough to spin correctly......hence it turning red.

So AFR is good, temp is fine, oil pressure is fine, drain line is fine.......did I screw something up with it when I got it hot while driving with my brakes dragging?

Any info on trouble shooting is greatly appreciated!!

Jeff Harper
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post #2 of 17 (permalink) Old 10-13-2014, 10:03 AM
 
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Re: Turbo issues

LOL. I did the same thing when mine was glowing red (freaked out)
They are suppose to glow red. If it is NOT then you have problems.



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post #3 of 17 (permalink) Old 10-13-2014, 11:52 AM Thread Starter
 
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Re: Turbo issues

If its supposed to glow red then I guess I had never noticed it before.......so the red is normal.

Not sure what caused my problem......when I took it apart......the bushing was not shiney at the contact location and the shaft had some slight grooving on the exhaust side......I assume thats not normal and should be completely smooth.

Even though I put the new bearing assy in it, I couldnt do anything with the grooves so I assume thats what is still making it squeal and make noise.

I plan to move my oil gauge bleed port over to the stator side (where my turbo oil line feeds from) just to verify the oil pressure at that location.

I figure my problem is in the grooves in that shaft.........surfaces need to be prefectly smooth to produce the right oil film for that kind of RPM?

I have not pressed apart the pressure side yet though.....I will do that soon and make sure there is nothing in there but I sure dont think there is. It turned over nice and smooth after the rebuild........but squealed upon trying to spool up under much throttle at all.

Another thing I noticed is that after the oil change, although the oil pressure was good and everything, it seamed to warm up really quickly........I kinda figure now it is because the turbo shaft was not spinning freely backwashing the exhaust?
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post #4 of 17 (permalink) Old 10-13-2014, 02:38 PM
 
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Location: St. Louis Missouri
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Re: Turbo issues

Cherry red in the middle of the dunes at 11 or 12pm at little sahara my first year with the turbo.


I got out to smoke a cig and take a break and that is what I saw. I freaked out, called Chad the next morning...... and ........ he laughed at me. LOL


It is freaky looking but that is what it is suppose to do. You can almost see through it seems like.


Looks like it is time to rebuild it. They say they need to be sent off and balance when rebuilt. Like $700 for Weber to do it.
5 years on mine. I will send mine off when the time comes.
Make sure your return line is not pinched off or too small. Poor flow will burn one up. Redline 20/50 full synthetic has worked well for me.


Never had mine apart so I really am no help with internals. But if you have no rub marks on the internal housing you are a step ahead already. LOL



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post #5 of 17 (permalink) Old 10-13-2014, 03:21 PM
 
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Re: Turbo issues

Quote:
Originally Posted by Harper View Post
Got an issue with my turbo......probably self inflicted.

Our September trip went well but ended up with a brake problem where the rear caliper was hanging and caused enough heat to melt the seals in the caliper and losing brakes completely. The car was running great up to that point and when I realized that, I stopped the car and the brake rotor was glowing red and so was the turbo housing. I let it cool down and then limped it back to camp with no brakes.

So we just went on an October trip........I fixed the brakes and changed the oil. Made sure I had good oil pressure turning the motor over before ever firing it up. Upon taking it out for the first time, I soon knew there was a problem. The turbo made some squeaking noises and would not boost. I got out and looked things over and the housing was glowing red.

I removed the turbo and took it apart and it didn't have any indication of rubbing but did seam to have a slight catch in the rotation so I took it apart, cleaned up the shaft real good and installed a new bearing assy and it still screeched at rpm. I had already double checked and made sure it was oiling (gauge said 80psi) and the AFR looked good as well.......starts and runs fine.......the rotating assy just must not be free enough to spin correctly......hence it turning red.

So AFR is good, temp is fine, oil pressure is fine, drain line is fine.......did I screw something up with it when I got it hot while driving with my brakes dragging?

Any info on trouble shooting is greatly appreciated!!

Jeff Harper

While your rear brake was dragging the turbo and the engine were working harder so the red turbo would be normal. Did your bearing have the large oil hole in it? It should have about a 1/4" oil hole on each side of it. The water craft turbo bearing has very small oil holes since it is also water cooled. That bearing comes with most generic rebuild kits and you have to be sure to get a kit that has the large hole bearing. Your turbo may have been rebuilt before with the wrong bearing and that would cause the grooves warn in the shaft from lack of oil and cooling. The only other thing that would cause the squeaking noise would be a wheel contacting the housing or the compressor wheel spinning on the shaft from the nut not torqued properly. Since the boost didn't come up I'd say the wheel was slipping on the shaft.
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post #6 of 17 (permalink) Old 10-13-2014, 06:09 PM Thread Starter
 
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Re: Turbo issues

The bearing in my turbo was the large hole and my rebuild kit had that one and the watercraft bearing in it as well. I installed the large hole bearing but wasn't sure about the shaft. The grooves are very minor but they are there so I don't know if it would even live long like that? It did come apart pretty easy and the nut wasn't all that tight so the compressor wheel spinning on the shaft seams possible. When I take it all back apart, I will check it......before tear down, I marked the shaft and the compressor wheel so I could rebuild it back like it came apart so I can see if it is now mis aligned or not.

So a watercraft turbo core would work if the bearing was changed out?

Thanks for the info!
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post #7 of 17 (permalink) Old 10-13-2014, 06:16 PM Thread Starter
 
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Re: Turbo issues

I could see no evidence of any contact in the housing or the blades.

It sounded like a squeaking wheel........my initial thought was it wasn't getting enough oil or something but I don't know?

I will check pressure from the hole the oil line comes from this weekend and I will check for clogging of the oil line as well.
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post #8 of 17 (permalink) Old 10-13-2014, 06:30 PM Thread Starter
 
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Re: Turbo issues

Pilot, do you know what parts are available for purchase for the turbo?
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post #9 of 17 (permalink) Old 10-13-2014, 08:49 PM
 
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Re: Turbo issues

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Originally Posted by Harper View Post
Pilot, do you know what parts are available for purchase for the turbo?
The water craft cartridge has different wheels on both ends so it will not work for our application. The compressor wheel is available and the rebuild kit you already have. There isn't any other parts available. Polaris has the complete turbo and that is about it. Even Weberpower can't get the complete turbo. It is available in Europe I believe from Weber. We have been forced to buy good used turbos from FST snow mobiles. You can have your cartridge rebuilt by Weberpower or other vendors but if it isn't reparable you will be stuck. Borg Warner makes these things but they are tied up by Weber Germany and Polaris and not available through any body except Polaris in the states. If your oil line is attached to the right hand side of the head you should change that to the left side. You will have to have a longer oil line made up since the hole is towards the front of the head on the left side. The reason for putting it on the left is that is much cooler than going over the hot turbine side with the oil line. You have seen how hot that turbine gets (red). Its not a good place to have your oil supply for the turbo to help cool and lube the turbo bearing. I make the oil line 16" long.

Last edited by Pilot; 10-13-2014 at 08:57 PM. Reason: Add info
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post #10 of 17 (permalink) Old 10-14-2014, 05:55 PM Thread Starter
 
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Re: Turbo issues

Got home from work today and removed the turbo for inspection and it spins so free with no visible contact anywhere......everything seams good so I decide to look around at other things........I find that the charge tube has partially come off at the throttle body!

That explains no boost and some noise......but it sure sounded like a squeaky wheel or something.......I will be amazed if that is all it is and all that noise is from a pressure leak at the charge tube lol!

I will put it back together tomorrow and see what happens and report back.
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