When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I put new fuel injectors in and what a PITA. The passenger side was a more difficult than the driver side (after removing the coolant tank).. pulling the tank was well worth it 100%! With the tank in place I could barely get a h d in. With the tank out I can get both arms fully in the cavity.
Nice work Just had mine cleaned, tested and reinstalled,77,000 miles.
1/2 were dripping so Raby is right.
AFAIK, the idea that bore scoring is caused/exacerbated by leaky injectors is still just conjecture. I haven't watched a Jake Raby video in a few months but last time I did, he was saying it was just a theory. In the absence of more definitive evidence, I'm still leaning on the theory that bore scoring is a manufacturing issue.
It can't hurt to replace high-mileage injectors, and in full disclosure, I had mine replaced at 87k miles but that was in the process of trying to track down a fuel pressure leakdown situation. It might also be a good idea if your oil analysis shows fuel dilution.
As a purely preventative measure, it's terribly expensive--especially if you're paying a shop the 8 or 9 hours of labor the book calls for.
This was my understanding as well. I asked my Indy about fuel injectors on the .1 and he said not to proactively change them unless I have a problem. He told me the same thing regarding chain tensioners, which I had also inquired about.
As you pointed out, if you're experiencing high fuel dilution in your UOA's and you're not regularly taking your car on short trips, it might be worth looking into it more. But it's an expensive and time consuming task for something that doesn't have a regular maintenance interval.
Next time my car is at my Indy, I might have him check the fuel trim levels and the camshaft deviation (chain tensioners) but as long as everything is within the specs it should be, I'm not going to change the fuel injectors nor the chain tensioners.
installed Fabspeed headers. install would have been insanely quick and easy, but i broke a bolt while torquing them down. 2 hours later, i got it out and finished up. they sounds so nice and full
DIY'd up some semi solid motor and trans mounts with 30a silicone rubber, replaced my oil pressure switch because of a p1163 fault code, and performed my first oil service on the car. Adding 5w-40 plus Ceratec for piece of mind at my high mileage... have had great experiences with LiquiMoly products of all types. My old VWs love the MoS2 moly additive. Will likely run that or MolyGen oil in the 997 after this cycle with Ceratec.
07-21-2020, 11:52 AM
Thanks for sharing.
