991 GT3 Running in...
Discussion
http://yel.pca.org/porsche-engine-break-in/
Ive read all the threads here but I found this via google and wondered what you guys think?
Im already running higher rpms than suggested but have yet to cross the 7500rpm but was considering going for the 9k rpm this weekend now im over 1000 miles on the new engine.
Ive read all the threads here but I found this via google and wondered what you guys think?
Im already running higher rpms than suggested but have yet to cross the 7500rpm but was considering going for the 9k rpm this weekend now im over 1000 miles on the new engine.
giggle said:
http://yel.pca.org/porsche-engine-break-in/
Ive read all the threads here but I found this via google and wondered what you guys think?
Im already running higher rpms than suggested but have yet to cross the 7500rpm but was considering going for the 9k rpm this weekend now im over 1000 miles on the new engine.
What makes you think any else outside of Porsche knows more about these engines?Ive read all the threads here but I found this via google and wondered what you guys think?
Im already running higher rpms than suggested but have yet to cross the 7500rpm but was considering going for the 9k rpm this weekend now im over 1000 miles on the new engine.
Follow the owners manual regarding break in.
My only advice regarding "break in" would be to at least at the end of "break in" have the engine oil/filter changed unless this is prohibited by the owners manual.
I put break in in quotes because break in continues long after the nominal break in period has passed.
Its an interesting one this changing the oil after the 'running in' period....I am not so sure. If Porsche considered it necessary they would specify it in the servicing requirements to maintain the warranty and no doubt charge for the privilege (similar to BMW M cars which some years ago the 1200 mile running in service was free...unfortunately no longer so 
) so I remain sceptical whether it is at all necessary......
) so I remain sceptical whether it is at all necessary......av185 said:
Its an interesting one this changing the oil after the 'running in' period....I am not so sure. If Porsche considered it necessary they would specify it in the servicing requirements to maintain the warranty and no doubt charge for the privilege (similar to BMW M cars which some years ago the 1200 mile running in service was free...unfortunately no longer so ) so I remain sceptical whether it is at all necessary......
Unfortunately Porsche along with many (all?) other automakers have gotten away from an early oil/filter service.) so I remain sceptical whether it is at all necessary......I can tell you based on my experience of rebuilding engines a new engine sheds a lot of metal trash, particulate matter. This trash is caught by the filter. But a problem arises if there is an oil pressure bypass that routes unfiltered oil around the filter during cold starts with high oil pressure.
The engine then gets lubed with this dirty/unfiltered oil.
Additionally a new engine is notorious for contaminating oil with combustion byproducts. This stuff dilutes the oil something fierce.
The only way to ensure the engine doesn't get fed unfiltered and dirty oil at cold start and at all times diluted oil is to change the oil and replace the filter.
After I bought a new 08 Cayman S I changed the oil/filter at 750 miles. The filter housing oil was full of very fine alum. (mostly alum.) metal particulate matter, to the point the oil had a metallic sheen to it. On my other computer I have a picture of this oil.
Then after another nearly 750 miles I changed the oil again and the particulate matter was much reduced to the point the stuff didn't even show up in pictures.
Then at 2K miles, at the end of "break in", I had the oil/filter service done at the dealer. I didn't even bother to check the oil the tech just removed the filter housing and dumped the oil and filter out into the drain basin.
One may not elect to change the oil as many times as I did before the end of engine break in -- I did this to just confirm modern engines built at a factory shed as much trash/particulate matter as I remember from engines I either helped rebuild or rebuilt on my own -- but I would urge anyone with a new Porsche to change the oil/filter at least at the end of break in, provided, always provided this is not forbidden by the owners manual.
Rockster said:
I can tell you based on my experience of rebuilding engines a new engine sheds a lot of metal trash, particulate matter. This trash is caught by the filter. But a problem arises if there is an oil pressure bypass that routes unfiltered oil around the filter during cold starts with high oil pressure.
As a general rule I think your comments are entirely fair, but haven't all these new GT3 engines been tested / run in at the factory, hence the issues you identify should be less of an issue?hondansx said:
After 1,000 miles, get an oil service and you're away!
Has anyone done this and noticed what came out?Im old school and have booked in at local OPC for oil and filter change on Saturday morning.
Engine will be circa 1150 Miles by then.
Its £271 inc. and Im going to get a stamp in my book too
I intend to keep my car for many years so I think even if entirely unnecessary I will always know it was done and the £271 will long be forgotten.
I have bypass exhaust fitted and was concerned about the OPC seeing it and it somehow affecting my warranty so I asked if it was best to refit the standard pipe first.
I was told my warranty is not affected apart from if the problem was caused by the part being fitted.
Edited by 5517 on Wednesday 7th January 15:33
sidicks said:
As a general rule I think your comments are entirely fair, but haven't all these new GT3 engines been tested / run in at the factory, hence the issues you identify should be less of an issue?
It is not clear to me that engines are run in much if at all at the factory. After a while the factory could rely upon its procedures to ensure satisfactory engine production success rather than actual testing.Regardless, the oil that is in the engine is not replaced. The engine leaves the factory and is installed in the car with the same oil that it had in it when it was first assembled.
So whatever running in the engine received at the factory it still has the beginnings of what will soon prove to be filthy oil.
When I had my Cayman S in for its final oil change at the end of break in I showed the tech pictures of the oil and filter element and housing from the first oil/filter change.
He said he never bothers to look at the oil as the oil change set up just has the oil draining into a large standard oil catch basin which directs the oil to a holding tank. The catch basin has a coarse plastic mesh filter to catch drain plugs and washers and filter elements and such.
The tech also said he never really pays any attention to filter element but did admit the appearance of my car's oil filter housing was consistent with what he sees. In this case the housing threads were treated with some light colored "grease" and there were water droplets on the threads. He said this is common as the car sit at the dock awaiting loading into a boat and then spend a week or more in the boat making the trip here and even after they arrive can spend some time near the ocean until they are picked up and trucked to their final destination.
I believe they use compressed air to run the engines post build to check that they are not too tight.
Certainly not a part of the running in process ...
For the sake a a filter and sump full of oil, I changed my Cayman R at 1000 miles and then again post run in I believe at 5000 (then including a couple of track days). I changed the gearbox oil a the same time.
It says everything about the care I took in running the car in properly --- which is precisely what I as a secondhand purchaser would want to know ...
Money in the bank ....
Certainly not a part of the running in process ...
For the sake a a filter and sump full of oil, I changed my Cayman R at 1000 miles and then again post run in I believe at 5000 (then including a couple of track days). I changed the gearbox oil a the same time.
It says everything about the care I took in running the car in properly --- which is precisely what I as a secondhand purchaser would want to know ...
Money in the bank ....
(0.8 Litres is the figure obscured by stamp on pic above)
It was interesting watching the technician plug the lap top in and it tells him exactly how much oil to add or remove.
However when he got it to read 0.00 it showed as having 204.79% oil against a maximum of 200%.
He dropped some oil and the 0.00 stayed the same but the % went down to 196%.
looking at the notes he used above it does say that on the cars oil measurement screen it should have the top two bars unlit but i only have one unlit and it shows oil level to maximum.
Edited by 5517 on Sunday 11th January 19:01
My GT3's just gone over the 1000 mile mark. I've been trying to restrict the revs to around the 5k area so now i'm thinking it's time to do the oil change. Not having dealt with Porsche service centres yet can anyone give me a ball park figure of what to expect to be charged for an oil and filter change ? Plus my two closest dealers are Cambridge and Colchester, anyone recommend one over the other ?
Many thanks.
Dean
Many thanks.
Dean
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