Going to Put in Rebuilt Injectors in my Motor
01-15-2019, 10:14 AM
#31
I'm putting new in mine. They aren't that expensive if you don't buy from Porsche! It's not worth it to me to put used/cleaned/qualified/rebuilt/(you choose which word you like best) at the chance that they might leak fuel into the cylinders washing the oil film off and possibly creating a long term engine fatal problem. That's just my choice...to each their own.
01-15-2019, 10:46 AM
#32
01-15-2019, 05:00 PM
#33
Rennlist Member
01-15-2019, 05:09 PM
#34
Rennlist Member
But Mr. 996AE, maybe apologize for coming across as an accusatory tone?
I mean Jake has nothing to gain from his post, and I think his credibility has more than proven himself. You can have your opinion - and quite frankly, your experience does count and is of value. I think we just need to change how we come across.
The truth is, I, too, have countless examples of rebuilt auto parts being worse off than the used part I picked up at the junkyard.
01-15-2019, 07:22 PM
#35
01-15-2019, 08:16 PM
#36
Mine is an MK-II 2005 C4S. I told the mechanic new, no rebuilt, He will confirm prior to ordering. Swear I saw a post above that Pelican Bosch are new?? Maybe it was WH33. Maybe both.
01-15-2019, 08:29 PM
#37
I agree that new is the way to go. Until Jake shares his trick, a new set of injectors for an MK-I car is $1200 just for the parts.
01-15-2019, 09:30 PM
#38
RL Community Team
Rennlist Member
Rennlist Member
They're also cheaper than Pelican Parts.
Make sure you use the Rennlist discount!
01-15-2019, 11:14 PM
#40
Rennlist Member
I have tried every brand of rebuilt injector. We have also had local shops specializing with injectors work with them. The results have never been the same as a new injector. We've tested them back to back, and I've even ran tests where 1 bank of the engine has new injectors, and the other has rebuilt. The differences in fuel trim were notable, as well as the rough running index on each bank.
The bigger issue with rebuilt injectors lies in the fluid that was used to clean them, and how long they have been on the shelf. As part of what we do, we work with wholesalers of parts that are having issues with products. A couple of years ago one company lost a lot of money selling rebuilt injectors due to warranty issues. I was asked to figure out the issue and it was determined that the fluid that was being used had a shelf life in the injector of 30 days, after that period it would actually begin to corrode the injector internally.
That said, cleaning and "rebuilding" injectors is done in a lab environment. The injector is being tested in a perfect scenario. Put that perfect injector on a hot engine that has just been shut down, and see if it will hold 60 PSI of dead headed fuel pressure without bleeding down overnight without puddling fuel in the intake ports and cylinders that have open intake valves. Give it a shot. Injectors have been fighting us for 5 years, and when I recommend to you to replace them with new units, this all comes from direct experience, pain, and suffering.
The bigger issue with rebuilt injectors lies in the fluid that was used to clean them, and how long they have been on the shelf. As part of what we do, we work with wholesalers of parts that are having issues with products. A couple of years ago one company lost a lot of money selling rebuilt injectors due to warranty issues. I was asked to figure out the issue and it was determined that the fluid that was being used had a shelf life in the injector of 30 days, after that period it would actually begin to corrode the injector internally.
That said, cleaning and "rebuilding" injectors is done in a lab environment. The injector is being tested in a perfect scenario. Put that perfect injector on a hot engine that has just been shut down, and see if it will hold 60 PSI of dead headed fuel pressure without bleeding down overnight without puddling fuel in the intake ports and cylinders that have open intake valves. Give it a shot. Injectors have been fighting us for 5 years, and when I recommend to you to replace them with new units, this all comes from direct experience, pain, and suffering.
My issue is your blanket statement. Rebuilt, balance, tested can be worse.
Jakes quote.
The "rebuilt" ones you are buying may be worse than what you already have.
Not trying to pick a fight with Jake, just not a fan of blanket statements.
01-16-2019, 12:17 AM
#41
Rennlist Member
Agree. Well, questioning might be OK if one is seeking to understand.
But Mr. 996AE, maybe apologize for coming across as an accusatory tone?
I mean Jake has nothing to gain from his post, and I think his credibility has more than proven himself. You can have your opinion - and quite frankly, your experience does count and is of value. I think we just need to change how we come across.
The truth is, I, too, have countless examples of rebuilt auto parts being worse off than the used part I picked up at the junkyard.
Came off harsh.
Less than honest inappropriate.
Assuming every 996 owner is rich and can afford to pay for new parts and making blanket statements that your rebuilt, balanced and spray pattern tested injectors by a reputable company maybe worse than before (you paid to have them rebuild) is a pretty bold statement condemning every rebuilder of injectors.
Again, not every Porsche owner can afford to replace injectors. Many will need to rebuild and take their chance.
01-16-2019, 01:10 AM
#42
Rennlist Member
I have some of each 996.1 and 996.2 injectors , but only the 996.1 are out on the shelf and have the fuel rail with them...They each have a index notch and a groove for the safety clip, but I remember them being the same...
01-16-2019, 12:05 PM
#43
Rennlist Member
01-16-2019, 12:15 PM
#44
Rennlist Member
The "rebuilt" ones you are buying may be worse than what you already have.
YES!
The point I poorly attempted to make is a professional, good reputation shop rebuilds, balance, spray pattern tested injector "maybe" worse is a bold statement even from the God of Porsche hard to swallow.
Thank you for the clarification.
YES!
The point I poorly attempted to make is a professional, good reputation shop rebuilds, balance, spray pattern tested injector "maybe" worse is a bold statement even from the God of Porsche hard to swallow.
Thank you for the clarification.
01-16-2019, 01:46 PM
#45
Originally Posted by wyovino
I agree that new is the way to go. Until Jake shares his trick, a new set of injectors for an MK-I car is $1200 just for the parts.
99660612001 is part number , not sure if this is the mk2 injector as mk1 is superseded or could be a good deal!!
Anyone know if this is the original mk1 part number??