Lifter noise: very seldom... Steve Weiner?
12-14-2013, 08:07 AM
#16
Three Wheelin'
My car had 64k when I picked it up. No lifter noise at all. Drove it home, switched to 0-40 as recommended by the dealer. Drove it daily for a yrar and approx 14k miles. At 78k +/- the car was now in floroda for the winter. The first trip I made down, the car had sat for approximately a month since it was last run. Noisy as hell. This occurred several times, several people assured me it was not something that needed immediate attention. Upon returning to NH I switched to 20-50 and resumed daily driving. No more noise. If I let it sit for a weeek or so in NH during the summer w 20-50 in it, the noise returned. Was it the switch to 0-40, the mileage, a combination of issues? When I pulled the lifters, the orings were brittle and maybe one or two came out in one piece.
12-14-2013, 09:58 AM
#17
Drifting
My car had 64k when I picked it up. No lifter noise at all. Drove it home, switched to 0-40 as recommended by the dealer. Drove it daily for a yrar and approx 14k miles. At 78k +/- the car was now in floroda for the winter. The first trip I made down, the car had sat for approximately a month since it was last run. Noisy as hell. This occurred several times, several people assured me it was not something that needed immediate attention. Upon returning to NH I switched to 20-50 and resumed daily driving. No more noise. If I let it sit for a weeek or so in NH during the summer w 20-50 in it, the noise returned. Was it the switch to 0-40, the mileage, a combination of issues? When I pulled the lifters, the orings were brittle and maybe one or two came out in one piece.
Dealer probably recommended it because it's commonly used in newer cars.
12-14-2013, 10:39 AM
#18
Race Director
not only the additives, its also just too damn thin.
12-14-2013, 03:26 PM
#20
Technical Guru
Rennlist Member
Rennlist Member
12-14-2013, 03:40 PM
#21
Race Director
12-14-2013, 09:06 PM
#23
Technical Guru
Rennlist Member
Rennlist Member
Porsche motorsports specified regular Mobil-1 5w40 for the 993 GT2...
Your 993 left the factory with a 40 weight (who knows what your dealer may have used for regular servicing). And almost twenty years later they are still saying it is ok to use a 40 weight.
Originally Posted by Linnm
Factory fill was Mobil 1 15/50
12-15-2013, 02:11 AM
#24
Race Director
The hint here is that the 40wt is not the problem...the 0w is.
12-15-2013, 07:05 PM
#25
Technical Guru
Rennlist Member
Rennlist Member
Wouldn't that make things thinner?
Based on what? Have you looked at the kinematic viscosity of 0w40 and 5w40 at 10C? How do we end up with threads like THIS suggesting the person immediately dump out their oil? What's the range of values that's considered good for bearings? If a 0 weight oil was not thick enough for the bearings on a cold startup, would you not expect to see similar problems with the main bearings on any of the water cooled GT3s built from 1998 to today?
Based on what? Have you looked at the kinematic viscosity of 0w40 and 5w40 at 10C? How do we end up with threads like THIS suggesting the person immediately dump out their oil? What's the range of values that's considered good for bearings? If a 0 weight oil was not thick enough for the bearings on a cold startup, would you not expect to see similar problems with the main bearings on any of the water cooled GT3s built from 1998 to today?
12-15-2013, 07:25 PM
#26
Race Director
Wouldn't that make things thinner?
Based on what? Have you looked at the kinematic viscosity of 0w40 and 5w40 at 10C? How do we end up with threads like THIS suggesting the person immediately dump out their oil? What's the range of values that's considered good for bearings? If a 0 weight oil was not thick enough for the bearings on a cold startup, would you not expect to see similar problems with the main bearings on any of the water cooled GT3s built from 1998 to today?
Based on what? Have you looked at the kinematic viscosity of 0w40 and 5w40 at 10C? How do we end up with threads like THIS suggesting the person immediately dump out their oil? What's the range of values that's considered good for bearings? If a 0 weight oil was not thick enough for the bearings on a cold startup, would you not expect to see similar problems with the main bearings on any of the water cooled GT3s built from 1998 to today?
As I should hope you know, bearings are not the only oiled areas of this engine.
maybe this will help
https://rennlist.com/forums/993-turb...-use-this.html
12-15-2013, 09:08 PM
#27
Rennlist Member
A 40 wt fill could be for break-in purposes. I ran B-P 30 wt when I did the first run-in of my 911 motor, it actually is a break-in oil.
03-30-2015, 07:51 PM
#28
today, my engine made this noise...
this can damage the engine if not replaced soon?
Here the sound: https://*******/e4ch
What do you think?
this can damage the engine if not replaced soon?
Here the sound: https://*******/e4ch
What do you think?
Last edited by irule; 03-30-2015 at 08:13 PM.
03-31-2015, 01:28 AM
#30
RL Technical Advisor
FYI,...Porsche's 10w-60 has less than 1000ppm of Zn &P making this inappropriate for the air-cooled engines. This one is best employed by the water-cooled, 4-valve engines.