Crack in Exhaust Manifold...
05-04-18, 01:01 AM
#211
Driver School Candidate
05-04-18, 06:47 AM
#212
You can add me to the list as well. Why hadn't I dug further into this when the symptoms started?! Sadly, my ticking began late last summer @ ~72k miles when I arguably would have been covered under the EPA's 80k/8yr emissions warranty. Some here had dismissed it as valve ticking prior to oil pressure developing. It's slowly gotten louder and is obviously not valves, and now now she's at 81k, just outside the limit.
We'll see what my local SM has to say... Otherwise, I've been interested in headers anyway, as I'm hopefully going w/RRR's SC in the next year or so. Still, given the safety implications, I'm also surprised there has not been a recall or at least TSB on this. Yes, as Lance mentioned, many here are discovering theirs outside of the standard Lexus warranty period, but statically there have to be many "non-obvious" failures starting well within the 80k mark.
I do know an exceptional class action attorney and may reach out to him on behalf of the community. He'd, nearly single-handedly, won the landmark $663M whistle-blower fraud suit against Trinity Industries a few years ago. Anyone know if CL might be able to help with a user questionnaire?
We'll see what my local SM has to say... Otherwise, I've been interested in headers anyway, as I'm hopefully going w/RRR's SC in the next year or so. Still, given the safety implications, I'm also surprised there has not been a recall or at least TSB on this. Yes, as Lance mentioned, many here are discovering theirs outside of the standard Lexus warranty period, but statically there have to be many "non-obvious" failures starting well within the 80k mark.
I do know an exceptional class action attorney and may reach out to him on behalf of the community. He'd, nearly single-handedly, won the landmark $663M whistle-blower fraud suit against Trinity Industries a few years ago. Anyone know if CL might be able to help with a user questionnaire?
05-04-18, 05:16 PM
#214
The following users liked this post:
UCrazyKid (05-07-18)
06-30-18, 02:02 PM
#220
Pole Position
No issues will result in driving the car with the cracked manifolds.......the car might pull timing based on the knock sensors mistaking the noise from the manifolds as knock but that's about it. Get headers and be done with the issue and let the car breathe the way it's suppose to!
06-30-18, 02:17 PM
#221
No issues will result in driving the car with the cracked manifolds.......the car might pull timing based on the knock sensors mistaking the noise from the manifolds as knock but that's about it. Get headers and be done with the issue and let the car breathe the way it's suppose to!
Thanks for the heads up!
06-30-18, 03:24 PM
#222
An exhaust manifold leak can cause burned exhaust valves, improper fuel trim as the leak introduces extra oxygen that is picked up by the oxygen sensor, and slow warm-up time which also causes high fuel consumption, which will also cause your catalytic converter to fail prematurely, and the exhaust fumes can easily enter the vehicle cabin through the heating system and cause the passengers to get carbon monoxide poisoning, etc,etc. Have the leak fixed pronto!
Lou
07-01-18, 09:17 AM
#223
Pole Position
^^^^^^Lol well there you go and more of a reason to get headers..........but that being said, that's an extreme case you pulled from Google and not what we've seen from this issue with the ISF. The majority of cracked manifolds (broken flanges) including mine that have happened are the welds on the flange breaking off and not necessarily the example you provided above, though could happen, but hasn't really been documented here on CL that I know of.
When I pulled my stock manifolds off both my flanges had busted off and there we no signs of a leak per se just the sad example of the stock manifolds that this motor was suppose to breathe through and rectified with PPE headers
When I pulled my stock manifolds off both my flanges had busted off and there we no signs of a leak per se just the sad example of the stock manifolds that this motor was suppose to breathe through and rectified with PPE headers
07-01-18, 01:36 PM
#224
I was in your position last last year, slight knocking noise, gasket from OEM headers the culprit etc. Xmas time is the worst time to try to save any $$$........however..............
I know there are faster cars out there but i love my ISF as its a great sounding V8, somewhat more unique than the german competition and decent power. So when you get around to installing headers, the sound becomes so much better (didnt think that was possible but yes, the sound completely changes). Im not even close to getting bored of the sound. As for power, well it has definitely helped in that department as well (even more so if you get it tuned after).
So it ticks the boxes on all fronts, its just a pricey mod to carry out. I wasnt looking forward to handing over all that $$$ for them but everyday driving it, justifies my purchase with a smile on my face. You'll love it.
I know there are faster cars out there but i love my ISF as its a great sounding V8, somewhat more unique than the german competition and decent power. So when you get around to installing headers, the sound becomes so much better (didnt think that was possible but yes, the sound completely changes). Im not even close to getting bored of the sound. As for power, well it has definitely helped in that department as well (even more so if you get it tuned after).
So it ticks the boxes on all fronts, its just a pricey mod to carry out. I wasnt looking forward to handing over all that $$$ for them but everyday driving it, justifies my purchase with a smile on my face. You'll love it.
07-01-18, 03:08 PM
#225
Driver School Candidate
Headers
IMO if you live in a lenient smog state it's worth getting headers since from what I understand it's a reoccurring problem with stock headers gaskets breaking. Cali on the other hand is a hassle and money switching them our for smog checks every 2 years. I just bought a warranty and got them fixed and now I'm covered for any other mishaps down the line. The car is already fast and getting headers isn't going to make it that much faster. It's the driver that will make your car faster with some good tires lol.