Boost leak around injector orings?
Thread Starter
TECH Fanatic
iTrader: (5)
Joined: Aug 2007
Posts: 1,053
Likes: 1
From: colorado springs Elevation: 6035 ft
Boost leak around injector orings? I have the truck intake with siemens deka 80lb injectors. I'm boost leak testing it and the orings going into to the intake, leak. Seems like a fatter oring is needed? Anybody else had this problem? Anybody know what orings to use?
I had this problem with my Pro Flow intake. Make sure the injectors are in the holes properly and not angled or pushed off center. A couple of my injectors were touching the fuel rail brackets and not allowing them to sit in the hole correctly.
Last edited by THADD; Mar 31, 2015 at 09:51 AM.
I had this same issue just last week with my injectors. They are the same 80# siemens injectors, and I have the proflo xt manifold. My stock orings were in fine shape, but just didn't seal up. I tried the petroleum jelly trick on the stock orings, but to no avail. So finally I was forced to buy oversized orings from Katech. I just put them in the bottom, since that is the only leak I had. Now, no leaks, and my car even picked back up 1 more pound of boost that it was losing.
As I remember there was diff size o rings bet an LS1 and LS3, but cant remember which was thicker
I switched from LS3 injs to the LS1 style, and I had to swap the o rings
maybe the LS3 was the thicker ones
I switched from LS3 injs to the LS1 style, and I had to swap the o rings
maybe the LS3 was the thicker ones
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo Thread Starter
TECH Fanatic
iTrader: (5)
Joined: Aug 2007
Posts: 1,053
Likes: 1
From: colorado springs Elevation: 6035 ft
The problem I found with the stock orings on the siemens 80's is the ID of the oring was to big for the injector letting boost escape. Some tiny orings that fit tight on the injector and installed them above the original oring and poof no more boost leak.