smoke from passenger vent
 

I went out for a drive this morning and as I started to hear a rattling sound and someone told me that smoke was coming out of the passenger vent. The good thing is taht this started when I was about a half a mile from the house and when I got home I smelled antifreeze and smoke was coming out of the passenger vent. I looked under the car and I saw something had leaked out and that it was causing the smoke. The other thing is that the ABS light, Traction Control Warning light ( The one with the ! symbol on it) and I lost all power steering as I turned into my drive way.

I am waiting for the car to cool down and I welcome any thoughts on what this could be from.

Thanks in advance!

Not sure about Porsches but an antifreeze smell and smoke from the vent is generally a sign your heater core is shooting craps. Let's see what others think.

I think he means the exterior vent on the passsenger side of the car. Perhaps the motor threw the belt?

Definitely the belt, but with possible waterpump/power steering pump involvement.

Determine what is leaking - coolant or power steering fluid.

Before replacing the belt, be sure both ancillaries are turning freely.

My guess is that one of them, the waterpump or power steering pump siezed which caused the belt to wear through and break.

Waterpump is most likely cause as you still had power steering until you hit your driveway. If the bearing seized, the seal is on the same shaft and likely went as well explaining the leak.

BTW, how many miles?

Thanks a lot for the feedback, LilB.

I checked it this morning as the car was cold. I started her up and the coolant tank was empty. I poured in some fluids into the coolant tank it leaked out. Also the same warning lights are still lit. She is a base model year 2000 and I have about 89000 miles on her.

Is a major repair and what do you think this might cost. Is it a belt, the water pump and or the power steering pump. When you refer to the bearing is that the bearing on the water pump?

Also, any advice on finding a local shop with a trustworthy mechanic or tech would be of great help because the shop I usually take my car to is about an hour away and I don't want to risk any further damage by driving the car. I would do it myself if there is a peace written that gives directions on how to fix it. Provided it is a simple solution I might be wiilling to try it myself as I have very basic mechanical skills.

Replacing the Waterpump and the belt is a very easy DIY.

You'll need a replacement belt, new or rebuilt waterpump (a rebuilt uses only the existing casting - all other parts, the shaft, bearing, seal and impeller are new), and a gasket. Tool requirements are minimum - 10mm socket, U-joint drive, 19mm socket, E-12 Torx Bit, Pliers.

The PN#s are:

Poly-Rib Belt - 996.102.151.64

Waterpump - 996.106.011.53

Gasket - 996.106.340.51

If you PM me an email addy, I'll send you the procedure as a WORD document.

Thanks LilB

Just sent you a PM with my addy

Get the rear service cover off and see what is going on with the water pump and belt.

I removed the rear service cover and my belt was chewed up pretty good and I have to replace the water pump. I just wonder what could have caused that to happen? I have taken my car to Porsche for everything since I got her a few years ago. Appreciate any aditional feedback. I am going to try to do it myself with the help of a mechanic buddy when my water pump arrives. I just bought a new one on ebay for $107. Here is the link if anyone needs to get one.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&_trkparms=tab%3DWatching&vi ewitem=&item=250240037342&_trksid=p3907.m32

Thanks again for eveyones help. Please post or message me any photos or diagrams that you think might be helpful.

Thanks again LilB, I look forward to hearing from you with regards to the installation directions.

Where in Fl are u??

west palm beach

The bearing in the water pump failed. This causes the pulley for the pump to wobble and the belt is not happy, since that belt also runs the alternator and power steering. That is why you had the warning lights and no power steering.

Here is the pump. Engine is out of the car for this picture, because it is hard to take a picture of the pump with the engine in the car.

The aftermarket pumps have a metal impeller. The factory pump has a plastic impeller. You will note this difference when you replace the pump.

Thanks Toolpants!

Should I assume that the metal impeller will be better and stronger than the plastic ones found on the factory pump.

Actually, there are pros and cons for each type of impeller. The metal ones are usually pressed pot metal. They could react more than the nylon ones if you allow your coolant chemistry to go sour and wear more. The nylon ones are maybe lighter and so draw slightly less HP. The differences are probably so minimal that it really doesn't matter.

Besides, this is not what failed (nor does it usually). The bearing is the likely culprit and either caused the pump/pulley to sieze, or as ToolPants described, it started wobbling, taking out the shaft seal with it (which is where the leak is coming from).

I've replaced maybe a dozen waterpumps in my time and always used a rebuilt one with no issues whatever. In fact, in a couple cases, the rebuilds lasted longer than OEM. Plus, they are almost always significantly cheaper.

Be sure to inspect the old pump when you remove it to account for all the mass. You wouldn't want to have pieces of the old seal or impeller flowing through your cooling system where they could cause blockage. If you find debris, or that impeller is very worn, you might think about flushing the system as part of the repair.

There is a debate about the metal vs. plastic impeller.

I have formed no judgment yet.

Here is the factory pump with a plastic impeller. A local owner gave it to me. The bearing failed.

Do you guys think I should change the thermostat and the hoses too?

Personally, I would swap the 'T'stat, and at least check the hoses...

By chance I was talking to a mechanic today about the use of a plastic vs. metal impeller.

This mechanic works at a dealership so he has never seen a metal impeller pump on a Boxster, as that is not what Porsche uses or sells.

He did say that VW use to use a metal impeller and when the bearings failed the impeller would grind away at the aluminum engine case, and perhaps that is why Porsche uses plastic.

I like the idea of using quality aftermarket parts that cost less then what Porsche charges. I'll bet that ebay pump is aftermarket with a metal impeller. Take some pictures of it and your old pump. If the Porsche water pump was so great to begin with, then it would not have failed so soon. I say put it in.

This mechanic gave me a pump he had just replaced. You can see the plastic impeller broke when it hit the case when the shaft wobbled due to failed bearings.

As you can see a chunk of the impeller is missing. When I see your pictures I will tell you more.

He does not replace the thermostat or hoses unless there is a reason to do so.

Toolpants, are the blades sheared off on that impeller or are they designed that way? I hope I never need to look at one in person, as my car just broke through 13k miles.

The vanes for the impeller broke off. The middle of the impeller, or what is left of it, is still on the shaft. The bearing on this pump is much worse than the bearing on the pump on the left.

The owner of the pump on the left is a local owner. He heard noises and saw coolant on the ground. I told him is most likely the pump. He took it in right away before the bearing got worse, and before the impeller could break into pieces. Since he caught it quick enough he did not throw the belt.

im having a similar problme i still have powersteering however but also have steam coming out only light that come on was the one on the temp guage the one that flashing when it gets too hot. Funny thing is that the temp guage said i was in the right temp but the light kept flashing till steam came out and antifreeze as well what does this sound like to u guys

Thanks ToolP and LilB for all of your help. I changed the water pump and replaced the serpentine belt with the help of a friend. I mixed porsche coolant and water to replace the coolant athat was lost and fired her up. The only problem is that almost all of the antifreeze leaked out and I the temp started to run above the normal 180 or so that is normal. I shut the car off and there was steam coming from the reservoir.

The hose that connected to the waterpump was a little worn and I had to special order it because almost everybody was out of stock. I have not gotten underneath her just yet but I am going to replace it as soon as it comes in in the next day or so. I could use any suggestions with regards to the car running hot and the steam from the reservoir. The fans in the front and rear are working fine and the thermostat looked alright.

Also, about how much coolant will I need?

The rear fan is just an engine bay exhaust fan - does not cool the engine at all, it prevents heat build-up in the engine bay.

Steam from the reservoir could be a bad cap, an open Bleed valve or a cracked Reservoir (not to mention hoses, clamps, spillage, etc.).

Hope you used Distilled water and not Tap water to mix the coolant.

Don't forget that when you fill the system with coolant after a water pump replacement you need to bleed the air out of the system. Remove the black plastic plate under the caps and you will see the metal lever for the bleed valve.

FOund the bleed valve is there any particular technique?

A few years ago Porsche started using a vacum filler device, which most people are not going to have. Before then there was the old method. I assume you do not have a tiptronic.

Lift up on the lever. Warm up the car a while and keep the tank full. Put the cap on run the engine at 2,500 rpms for 10 minutes to get the thermostat opened. Make sure the tank is still filled. Run the car at 2,500 again for 5 minutes and every 30 seconds briefly rev the engine up to 5,000 rpm.

All this is for a car in a shop setting. When I bled my system at home a few years ago I filled the tank. Put the cap on and lifted the lever. Then I went for a 20 minute drive. I brought water with me in case the low level warning light came on to top off the tank, but it did not. When I got home I filled the tank to the max and closed the lever.

Don't burn yourself.

Thanks ToolP. I will try that in the morning.

I hope that means you are not going to try burn yourself.

Any pictures of the old and new pump? Does that ebay pump have a metal impeller?

Thanks again ToolP, I will do my best not to get burned.

The new pump has the metal impeller and I did not take a picture of it before I installed it. Sorry about that. I will take a picture of the old one and post it for you in the am when I get out to the garage to work on it.

Thanks again ToolP I bled it like you suggested and so far so good no leaks. I used distilled water and I will drive it a little tomorrow morning and see how she reacts. If no leaks then I will flush and fill with proper coolant.

The temp ran a little just past the 180 mark on the temp gauge, the fan came on and off. Topped off a little and put down the bleed valve and closed her up. The warning light was blinking the whole time while I was bleeding her. Am I to assume that is normal since I did all of this while the car was in my garage? Door open of course.

Here are a few pics of the old water pump

The blinking light is because of the low level in the tank. If you fill the tank up to the max while it is blinking and the engine running it will continue to blink. But once you turn off the car and start it up again the blinking stops.

If you did not get all the air out then, as I said, you can drive around with the bleed valve open for a while. If you see the level going down a bit then you know there was still some air that has come out and replaced by the coolant.

Can't see the first 2 pictures. The pulley is cockeyed and wonder if the impeller took a hit.

Any indication on the pump or packaging as to who makes it and in what country?

Thanks again for all your help.

It looks like the bearings went out and then the plastic impeller got beaten up pretty good.

I did not see any obvious label on the pump. I did see a small marking that says SEM on it. I edited my initial post. The pics should be better now.

I wanted to replace the hose that connects to the water pump but as usual Braman Porsche ordered the wrong hose and their excuse was priceless. "We don't know we usually just swap out the part when the tech brings it to us."

Do you know the part number for that hose?

I looked at PET and see why the wrong hose was ordered. There is a page of spaghetti hoses. A diagram of every hose in the cooling system and then the poor parts guy has to figure out which one go where. No written descriptions. And of course the water pump is is on a different page. I do not want to guess at it either.

If you want to get under the car again you can look for a part number on the hose. Or, just leave it alone.

As for the impeller on your old pump. It went bye bye.

One of your pictures.

Thanks again ToolP, I took her out for a short drive on Friday and she had no leaks but ran a little warmer than normal. There was no smoke or leaks as I found before I bled her. Am I correct to assume she ran a little warmer than normal is because I used distilled water?

Once I get the hose replaced I am going to flush the coolant and replace with coolant and she should be back to normal. BTW is this the hose that connects to the water pump from your picture below?