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Some of you might find this trivial, but to break up the work today when I took snow tires and wheels off of 3 vehicles and put on summer treads, I decided to document the process. I hope those who have not tried this might be inspired--the rest of you can just laugh.
So here we go step by step:
1. Park the vehicle on a level hard surface. Engage the parking brake.
2. Fetch the wheel lug key socket from the tool kit, left side of the frunk.
3. Get your floor jack and Porsche adapter puck.
4. Everyone has a soft-sided lug socket, right? A cordless impact wrench really helps.
5. And also some guide lugs?
6. Jack up the car, using the rear jack point under the sill. This will lift both the rear and front wheels.
7. Remove 2 lugs. I like to remove one nearest the top and another lower down. Screw in the guide lugs.
8. Remove the other lugs, and side the wheel off. The guide lugs will help prevent bumping the inner rim against anything. Once the wheel is off, do a quick inspection of brakes (especially pad thickness, leaks) and all other bits.
9. Slide the replacement wheel and tire onto the hub, using the guide lugs. Install and snug up 3 lugs. Remove the guide lugs and install the last 2 lugs. Remember the "official" Porsche protocol: the center crest bottom should point at the inflation valve, and the locking lug should be above the top of the crest!
10. Let the car down, do the other side, and when all 4 corners are done and on the ground, torque the lugs to the designated spec (160 N-m or 120 ft-lbs for me).
11. Fire up the compressor and set front and rear tire inflation to desired spec. Put everything away and all done!
Thanks for putting this out there, Mr. Kranz! Just one tweak you should make in your process: Use a jack stand in addition to your floor jack. The way you're lifting your car is unnecessarily risky. You don't want your jack to fail and have that car drop to the floor.
Lift the car from the rear, like you're doing, but lift it high enough to place a jack stand under the front jack point, just in case. That way if the jack fails, at least the front of the car will rest on the jack stand and keep the rear from hitting the ground, or worse, crushing your foot.
what about guide lugs and puck best ones to buy and where ?
If you don't mind , I have been thinking about doing the brake work myself but need these parts to do so. Since I have about a month off of work , I figured it would be a good time to get into it.
As a suggestion..... get rid of the funky wheel bolts that require the key.
I had an "oh crap" moment when I went to install my winter wheels and could not find that key.
<-------- not to name names but someone didn't put it back where it belonged.
Luckily the dealer tech lives a few miles away and brought home the wheel lock master set they use at the dealer along with 4 new bolts so I could change them out.
As a suggestion..... get rid of the funky wheel bolts that require the key.
I had an "oh crap" moment when I went to install my winter wheels and could not find that key.
<-------- not to name names but someone didn't put it back where it belonged.
Luckily the dealer tech lives a few miles away and brought home the wheel lock master set they use at the dealer along with 4 new bolts so I could change them out.
+1,000,000
The first accessory I bought when I got my '06 Cayman and then '15 991 was 4 normal wheel bolts to get rid of the anti-theft bolts. I autocross so I tend to change wheels/tire more than most, so those things have to go.
I guess it depends where one lives, but I can't recall ever seeing a car sitting on cinder blocks absent the wheels, so I assume thieves don't bother stealing just the wheels and simply take the whole car.
Thanks for putting this out there, Mr. Kranz! Just one tweak you should make in your process: Use a jack stand in addition to your floor jack. The way you're lifting your car is unnecessarily risky. You don't want your jack to fail and have that car drop to the floor.
Lift the car from the rear, like you're doing, but lift it high enough to place a jack stand under the front jack point, just in case. That way if the jack fails, at least the front of the car will rest on the jack stand and keep the rear from hitting the ground, or worse, crushing your foot.
You are correct. My excuse is that I trust my AC jack for the short period I have each wheel off. If not taking photos, I swap each corner in about 5 minutes. If I have more protracted work, I use jack stands--and I put one of the removed tires and. wheels under the car for backup.
what about guide lugs and puck best ones to buy and where ?
If you don't mind , I have been thinking about doing the brake work myself but need these parts to do so. Since I have about a month off of work , I figured it would be a good time to get into it.
Porsche makes the guide lugs too. You really need just one, but 2 probably make it work even easier. I found that the Porsche one is made of soft metal as to not damage anything, Eventually the threads of the guide bolt get beat up over a few years of changing many wheels. Then you just buy a new one. Well at least thats what I do.
04-07-2020, 10:48 PM
991 Tire and Wheel Change
