Scoring Valves 993
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3rd Gear
Joined: Jun 2023
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Scoring Valves 993
Dear 993 owners. I'm in the process of buying a 993 3.6 Cabrio, model 1997 model 100.000 miles on the odometer [last air cooled Porsche engine]. Are their any specifics I should be aware of like scoring, valves, etc..
Much appreciated
Much appreciated
Three Wheelin'
Joined: Apr 2009
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What is your location... US or ROW?
But simply put, there do not tend to be any engine problems. Same as any old car, look for rust to indicate accident damage, but otherwise the 993 only may rust around the front and rear screens.
But simply put, there do not tend to be any engine problems. Same as any old car, look for rust to indicate accident damage, but otherwise the 993 only may rust around the front and rear screens.
Thread Starter
3rd Gear
Joined: Jun 2023
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thanks for replying and good to know. Other forums indicate valves and carbon issues and possible cylinder scoring causing costly engine repairs. The 1997 engine update should be updated to these 3.6 liter issues! I may consider a full technical survey.
Three Wheelin'
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Not sure where you've obtained that information, but I did ask what is your location.
In the US, the 993 engine has a secondary air injection system, or SAI, which can 'carbon up', but the ROW engines do not have this.
Never heard of any bore scoring on the air-cooled engines; that's a 9x6/9x7.1 problem, possibly connected to high ethanol fuels.
In the US, the 993 engine has a secondary air injection system, or SAI, which can 'carbon up', but the ROW engines do not have this.
Never heard of any bore scoring on the air-cooled engines; that's a 9x6/9x7.1 problem, possibly connected to high ethanol fuels.
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While a 95 is OBD 1 it doesn’t have the extra HP of the Varioram 96-98. 96-98 are better just buy the best and well maintained and you will have zero issues. Too many are hung up on OBD1 95 cars which is B.S.
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If you want vram you can have vram on a '95 and 3.8 or 4.0 etc, and far easier to chip tune the final setup
Here's what you get '95 3.8RS w/ custom chip and no immobilizer
RL Community Team
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Hi Frederik,
The 993 engines tend to be bulletproof from an internal engine repair standpoint.
If you overfill the oil, something that is easily done, the engine will appear to be burning oil. Enterprising shops will try to sell an unnecessary top-end rebuild based on this.
Once in the life of the car, the hydraulic lifter cartridges under the valve covers will need to be replaced if the engine sounds like a bucket of ball bearings rattling around at startup.
The steering rack will need to be rebuilt usually sometime between 80 and 120K miles on the odometer for leaking.
Here is my page on what to look for when considering purchasing a 993:
https://993servicerepair.blogspot.co...-purchase.html
Andy
The 993 engines tend to be bulletproof from an internal engine repair standpoint.
If you overfill the oil, something that is easily done, the engine will appear to be burning oil. Enterprising shops will try to sell an unnecessary top-end rebuild based on this.
Once in the life of the car, the hydraulic lifter cartridges under the valve covers will need to be replaced if the engine sounds like a bucket of ball bearings rattling around at startup.
The steering rack will need to be rebuilt usually sometime between 80 and 120K miles on the odometer for leaking.
Here is my page on what to look for when considering purchasing a 993:
https://993servicerepair.blogspot.co...-purchase.html
Andy
Last edited by pp000830; Jun 12, 2023 at 05:18 PM.
RL Community Team
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Hi Cactus,
Generally, both owners of Varioram and non-Varioram cars are happy with their vehicles. The later cars have incrementally more power at certain RPMs but also have the Varioram actuators that will need to be replaced at some point in the car's life. In the US the Varioram cars are also OBD-II cars so they report issues with the catalytic converter and the supplemental air injection system both requiring repairs to make the Check Engine Light go out. Both are non-issues with the OBD-I cars.
So, my view is that there are plusses and minuses to each, all in all not enough to dissuade me from buying one over the other.
Andy
Generally, both owners of Varioram and non-Varioram cars are happy with their vehicles. The later cars have incrementally more power at certain RPMs but also have the Varioram actuators that will need to be replaced at some point in the car's life. In the US the Varioram cars are also OBD-II cars so they report issues with the catalytic converter and the supplemental air injection system both requiring repairs to make the Check Engine Light go out. Both are non-issues with the OBD-I cars.
So, my view is that there are plusses and minuses to each, all in all not enough to dissuade me from buying one over the other.
Andy
Last edited by pp000830; Jun 12, 2023 at 07:54 PM.