Hey all. Well, my car is finally running and we're having a problem and I want some input, APS and any others that want to comment. My problem is that the oil is being dumped into the exhaust, WHY? I've asked peter and he said check the scavenge pump to see if its working. It is. Dan (speedyD) advised me to check the breather tubes, if the right tube is going into the intake tube that the oil could be coming from that. Well, all my valve cover tubes are vented to atmosphere. My shop told me that Les (LoBoost) was working with peter about this and he was advised to install a .031 restrictor in the oil feed lines to the turbo's. My shop did this on a GTO and its been flawless since, low 10's even. So tell me whats up with this? Peter says that they have 50 GTO's, none running a restrictor. I haven't heard a single thing from any C5 owner about having excessive oil in there exhaust, so someone please help with my issue.

Its so close too. Atleast its running, waiting to be finished tuned and off to the dyno.

 

What shop did your install????


Kevin

 

Not yours

 

What method did you use to check the scavenge pump? I cant see how this could be happening other than the oil isnt getting pumped out correctly. Are there any kinks in the return lines?

 

Perhaps you are pumping to much oil pressure into the turbocharger which is blowing passed the seals of the turbo & burining off in the exhaust ...

Did you pull off an intake pipe to see if its full of oil to ?

 

Jimmy first off I am sorry to hear you are having a oiling issue with your kit, my problem was different and I also have different turbos than you.

So here goes I have GT2886 BB garretts in my kit it was the earlier kit for the GTOs prior to the new kits that are out now with the same turbos as you. I installed a LS4 oil pump when I installed the kit and GT2-3 cam since I wanted the extra volume of oil just in case I needed a oil cooler.

My oil pressure was around 35psi hot at idle and close to 75 at higher rpms, the garrett ball brg turbos do not like to see more than 40psi at any time otherwise the oil will overwhelm the seals this is per Garrett technical. So I made a restrictor .038 because I was pushing some oil into the exhaust and smoking. I have not a had a problem since 19000 miles on the kit now.

I think you should first verify that the pump is working properly and installed and wired properly so that it is sucking oil if the wiring is backwards the pump will push instead of suck.

Verify you or the installer did not get the check valve betwen the v/c and the pump installed in the wrong direction. You should be able to blow through it from the pump side but not from the valve cover side.

Are your lines leading to the pump at a down hill slope all the way to the pump, are you sure the pump is still running after the car starts maybe the pump is incorrectly wired and turning off after start up instead of continuing to run.

What is your oil pressure? you may want to verify the actual pressure going to the turbos with a mechanical gauge adapted to fit in between
the distribution block and the turbo using a T adaptor.

I am not sure of what the minimum oil pressure to the turbos can be on your particular turbos without damage. I believe Peter will need to answer that. But I do believe your concern is unique since I have not heard of any other issues of oiling the exhaust on the new turbos and there are a lot of them running around now. It is also possible you have a defective turbo but not likely unless it was starved for oil some how on startup or just plain defective.

Hope I helped even if its just ideas.

Les

 

Hey Jimmy I just found this post because I thought I read it somewere, you are not using the scavenge pump supplied buy APS since it was somehow lost correct?

It may be a compatebilty issue or possibly you changed fittings to adapt it and there is some sort of restriction or the pump just cant keep up. My kit uses a Weldon pump made specifically as a fluid transfer pump, also I know APS hired a company to develop the pump supplied in there kit to a strict set of tolerances and specs.

Les

 

You might try calling forum vendor LAPD and talk to Al. I believe they have installed the most APS kits to date. They might be able to point you in the right direction.

 

Thanks all. I was informed that the pump is working when its running, by opening the oil fill cap and seeing the oil pumping into the valve cover. The pump was a little different but it was the pump that APS told me to get from Kinsler. I believe its a Welden 9200A pump. It is mounted next to the rack about level with it. I mounted the pump when I was there helping and the shop wired it, relay wise. In, comes from the turbo's after its y'd with the supplied block and out goes to the check valve, arrow facing correctly, toward the valve cover I believe. I am running the same pump you are Les and a large rev pattern cam.

Thanks
James

 

James I am not familiar with your engine is it stock besides the cam? or is it a forged engine with upgraded oil pump etc? I think you should try and check the oil pressure going to the turbos with a mechanical gauge. You may want to remove the drain lines and verify there is no blockage at the turbo drains such as a poor fitting gasket or a fitting that may not have been properly drilled.

Les

 

How much oil is being lost ? Just enough to give blue smoke ... or visible loss via exhaust ?

 

The weldon 9200a is also adjustable with a slider ring in the body. I think there are four allen head bolts in the top of the body that allow the piece to slide. Make sure the pump is set up for full flow or it WILL back up oil into the turbos. Once the oil is in the exhaust it will take about 20 minutes of driving to burn it off and stop smoking.

 

Sorry to here your having problems with the APS kit. Anything that is new on the market and not proven will have there issues. Hope you get them sorted out.

 

to many chefs in the kitchen

jim do me a favor and post a pic of the valve cover on the passenger side. i wanna seeb were the oil return line is. more speculation wll not help.

 

The oil return is going in under the oil fill cap. I'm not sure about the pump but I was assume since it came from Kinsler that they are set up for full flow. Les, I'll have them check that but I'm pretty sure all that is intact and set up correctly. It smokes really bad and there is oil dripping from the exhaust. Les, also it is a stock motor, large cam and the same pump you are using. He wants to try it with the restrictors, but our concern is why are no other C5 kits having this problem? So I want to think its with the install and you all are giving good ideas and I thank you.

 

If it gets really bad you may have to put in new seals on those turbos.

 

please take a pic....

 

Well if you are using the same LS4 oil pump as me then you are most certainly overwhelming the turbos with excess pressure. Do a pressure check to the turbos because if you do restrict the oil you will need to know exactly how much pressure you are getting to the turbos. Also the LS4 pump has such a large oil volume it is probably really putting a lot of oil through the turbos.

Les

 

I'll get some pics tomorrow guys. So the restrictors are a good thing if I'm using a LS4 pump huh. I'm guessing no one with an APS kit is using a large volume pump? I'll see if I can go look at the car a little closer tomorrow and I'll report back.

 

Its not really fair to assume that its the APS kit thats wrong here. Since an "Aftermarket" scavage pump is being used, it could very well be the pump itself and NOT the "Unproven" kit..

Not to mention that the pump is clearly adjustable, as stated by member "Madboost"


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