Crack in Exhaust Manifold...
08-09-20, 02:31 AM
#347
Lexus Fanatic
iTrader: (10)
Join Date: Nov 2004
Location: Under an IS F since 2008
Posts: 13,441
Received 1,064 Likes
on
586 Posts
I still wouldn't replace with NEW manifolds... A decent welded repair should do the job just fine for another 5 - 10 years..
Joe Z
The following users liked this post:
ChpEng (08-09-20)
08-09-20, 10:10 AM
#348
Tech Info Resource
iTrader: (2)
FWIW, I never replace nuts or studs unless they're damaged or torqued to angle, and even then I didn't replace the bolts on the ring gear in my diff when I put in the Giken spool. Head bolts are the only ones I will replace on principle because I can't actually measure stretch on them. Rod bolts I can, so I only replace rod bolts on a street engine when they don't stretch properly or show signs of wear/permanent deformation (it's not a bad idea to have a virgin bolt for reference length). If your hardware isn't corroded, the flats are not rounded, and the threads are undamaged, there's zero reason to replace it. Axle bolts are also in the "better have some spares on hand" because they're typically staked in place and they're never pretty when you remove them.
The following users liked this post:
ChpEng (08-09-20)
08-09-20, 02:04 PM
#349
Took the car to my long-time mechanic Friday for a 2nd opinion. His advice was the same. He will inspect the header cracks upon removal and we will only replace them if he determines his TIG weld repair would be unreliable. Bottom line = my bit has been solidly flipped from "0" to "1" (I agree with you). Thanks for persistent advice. :-)
The following users liked this post:
Joe Z (08-09-20)
08-10-20, 08:33 AM
#350
Saturday night was fun.
Also installed mounts, and RR racing intake with CF elbow. Waiting on tune.
No more engine weight shift at WOT and no moh clickety clack from exhaust leak.
The following 5 users liked this post by Wh0pp3r:
ChpEng (08-11-20),
dugahole55 (08-11-20),
flowrider (08-10-20),
MileHIFcar (08-10-20),
Positron (08-10-20)
08-12-20, 11:16 AM
#351
Tune is on the ecm, so far so good.
i laughed at Simons response "Hi Steve, What took so long?!" referring to the fact that its just over a year since i bought everything lol.
car feels amazing. still want to add catback. most likely will go with RR-Racing magnaflows due to quality reviews and pricing. that'll complete the FBO.
i also realized that my axle back isnt stock. prior owner had some PTS poorly welded on. which is fine since im replacing the system anyway.
the fumes are noticeable at idle, cant wait to add cats. and gonna replace the vents in the rear as well.
i also have to note that the sensors in the headers where stuck on, we cut the harnesses on the sensor due to this and lucky i was ready with new sensors.
and one final note.
i did ask my boss about allowing us to do header installs for these cars like i did mine.
we typically are just a maintenance shop, not a modifying shop. so if there are people out there that just want us to do these install with say the engine mounts and starter replacement he said we can for 1000.00.
he did state that we don't offer warranty on aftermarket parts and parts provided.
located in N.Hollywood
edit : price also does NOT include alignment. we will do our best to preserve the alignment, but it is recommended once the work is done.
i laughed at Simons response "Hi Steve, What took so long?!" referring to the fact that its just over a year since i bought everything lol.
car feels amazing. still want to add catback. most likely will go with RR-Racing magnaflows due to quality reviews and pricing. that'll complete the FBO.
i also realized that my axle back isnt stock. prior owner had some PTS poorly welded on. which is fine since im replacing the system anyway.
the fumes are noticeable at idle, cant wait to add cats. and gonna replace the vents in the rear as well.
i also have to note that the sensors in the headers where stuck on, we cut the harnesses on the sensor due to this and lucky i was ready with new sensors.
and one final note.
i did ask my boss about allowing us to do header installs for these cars like i did mine.
we typically are just a maintenance shop, not a modifying shop. so if there are people out there that just want us to do these install with say the engine mounts and starter replacement he said we can for 1000.00.
he did state that we don't offer warranty on aftermarket parts and parts provided.
located in N.Hollywood
edit : price also does NOT include alignment. we will do our best to preserve the alignment, but it is recommended once the work is done.
Last edited by Wh0pp3r; 08-12-20 at 05:08 PM.
08-12-20, 03:20 PM
#352
Tune is on the ecm, so far so good.
i laughed at Simons response "Hi Steve, What took so long?!" referring to the fact that its just over a year since i bought everything lol.
car feels amazing. still want to add catback. most likely will go with RR-Racing magnaflows due to quality reviews and pricing. that'll complete the FBO.
i also realized that my axle back isnt stock. prior owner had some PTS poorly welded on. which is fine since im replacing the system anyway.
the fumes are noticeable at idle, cant wait to add cats. and gonna replace the vents in the rear as well.
i also have to note that the sensors in the headers where stuck on, we cut the harnesses on the sensor due to this and lucky i was ready with new sensors.
and one final note.
i did ask my boss about allowing us to do header installs for these cars like i did mine.
we typically are just a maintenance shop, not a modifying shop. so if there are people out there that just want us to do these install with say the engine mounts and starter replacement he said we can for 1000.00.
he did state that we don't offer warranty on aftermarket parts and parts provided.
located in N.Hollywood
i laughed at Simons response "Hi Steve, What took so long?!" referring to the fact that its just over a year since i bought everything lol.
car feels amazing. still want to add catback. most likely will go with RR-Racing magnaflows due to quality reviews and pricing. that'll complete the FBO.
i also realized that my axle back isnt stock. prior owner had some PTS poorly welded on. which is fine since im replacing the system anyway.
the fumes are noticeable at idle, cant wait to add cats. and gonna replace the vents in the rear as well.
i also have to note that the sensors in the headers where stuck on, we cut the harnesses on the sensor due to this and lucky i was ready with new sensors.
and one final note.
i did ask my boss about allowing us to do header installs for these cars like i did mine.
we typically are just a maintenance shop, not a modifying shop. so if there are people out there that just want us to do these install with say the engine mounts and starter replacement he said we can for 1000.00.
he did state that we don't offer warranty on aftermarket parts and parts provided.
located in N.Hollywood
08-12-20, 05:05 PM
#353
08-26-20, 08:36 PM
#354
Driver School Candidate
Have an 08 IS F w/ 86K mi, recently noticed the ticking sound on cold starts, assuming it's the cracked exhaust manifold. I don't feel any impact on engine power right now, any idea how long will it take for the crack to get big enough to start affecting performance at WOT?
08-26-20, 09:04 PM
#355
Pit Crew
Can someone confirm if this is the ticking sound they're hearing with the header leak?
Also not sure why it's playing sped up on normal play back speed? Maybe my internet is getting wonky.
Also not sure why it's playing sped up on normal play back speed? Maybe my internet is getting wonky.
08-27-20, 02:17 PM
#356
Tech Info Resource
iTrader: (2)
The video really sounds like normal direct injector noises. It's synchronous, speeds up with rpm, gets quiet on decel,... Pretty much everything normal sounding.
The following users liked this post:
Joe Z (08-27-20)
08-27-20, 04:40 PM
#357
Can someone confirm if this is the ticking sound they're hearing with the header leak?
Also not sure why it's playing sped up on normal play back speed? Maybe my internet is getting wonky.
https://youtu.be/nctZpLbZKp8
Also not sure why it's playing sped up on normal play back speed? Maybe my internet is getting wonky.
https://youtu.be/nctZpLbZKp8
08-27-20, 09:01 PM
#358
Pit Crew
Hey lobux, was a relief to hear and read upon others as well. You maybe very correct, seemingly normal. Just odd because my other v8 is a corvette ls1 didn't have the same snap clap tick.
Whopper, I might have small header crack? I can hear a little faint like that outside hood closed.
Whopper, I might have small header crack? I can hear a little faint like that outside hood closed.
08-28-20, 03:39 PM
#359
08-28-20, 05:07 PM
#360
Driver School Candidate
Join Date: Jan 2018
Location: California
Posts: 6
Likes: 0
Received 0 Likes
on
0 Posts
Last edited by ocramyer; 08-28-20 at 05:52 PM.