I decided the noise I heard was just normal turbo operation. After replacing the turbo with a new unit. The noise came back but never got as loud as the first time. .

I was able to use my mechanics stethiscope and rev the engine in the garage to hear the whine from the turbo. I could not hear it on the compressor body, but once I put the tip of the scope on the exhaust manifold, I could hear it clear as day. I'm thinking the exhaust side bearing in my CHRA is bad ...

I took my intake out again and found my intake tube had a notch taken out of it. I dont think it is effecting the sealing though. I thought at first that I may be able to hear the turbo operating (and unfiltered air was being sucked into the turbo) through the notch, but I don't think this is the ...

I just realized how ignorant I've been. While on lunch break, I drove the car again and popped it into Neutral. I could slightly hear the noise again, probably because its getting worse. But I noticed when I pop the car into neutral and hold the throttle at the same position the RPMs skyrocket ...

But the engine is still producing exhaust gasses in park and neutral, and those exhaust gasses pass by the turbine blade. So the blade must be spinning, which means the compressor wheel is spinning too. Unless in park, the wastegate opens all the way, or all the pressure from the compressor is ...

I think rpm is rpm. So if the engine is spinning at 3600, the turbo is spinning too, regardless of load or not. But, there it could be linked to loading is when the engine moves. It must move slightly under larger load so if there were some type of exhaust leak, I guess its possible it could "flex ...

Hello all,

I posted this over at V70r.com but not a lot of traffic there now. Here's whats going on:

So, quick back ground. Earlier this year I burnt 2 valves. First one went in January, second one went in May. Decided to rebuild my top end. While I was down there, I wiggled my my turbo shaft ...

I am thinking of going with Clearwater. Had 2 burnt exhaust valves. Has anyone else been concerned about getting a R/R head and using your original cams? I'm overly cautious, but it would seam like your original head would be better to use since the cams are "used" to it already.

Wow, I did not intend for all that dialogue to occur after my response. As was stated, both by myself and the original author, this "fix" is for increased blow by usually occurring on start up of the engine. During start up, the combustion chamber is cold and the piston ring end gap is larger ...

mecheng is correct. I design fluids based labs for a university dealing with laminar and turbulent flows. The point were the pressure increases is usually the point of "obstruction". You can think of this as an orifice. I just did this fix on my 1998 V70 R AWD with MAJOR oil leaking from the rear ...