Lexus IS250 4GR-FSE Engine Carbon Build-up (merged threads)
02-24-12 | 01:29 PM
#736
Intermediate
Joined: Jan 2012
Posts: 489
Likes: 0
Do you know if it's new or used.. does it come with additional warranty? I plan to ask my service guy these questions via an email but I'm going to leave him alone for a couple weeks as I don't want to be annoying.
here's the RO
02-24-12 | 01:33 PM
#737
They didn't replace your spark plugs.
As for the warranty, it would not be extended (unless you were within 90 days of it ending, in which case it would be minimum 90 days).
Jeff
As for the warranty, it would not be extended (unless you were within 90 days of it ending, in which case it would be minimum 90 days).
Jeff
02-24-12 | 01:58 PM
#738
Intermediate
Joined: Jan 2012
Posts: 489
Likes: 0
Ah, bummer. Well I guess I'll hope this one doesn't end up having premature scratches all over cyl #3.
02-27-12 | 07:51 PM
#741
Driver
Joined: Aug 2008
Posts: 190
Likes: 2
From: TX
I finally opened my engine to check the valves n used a bore scope to see the pistons ill post pics tonight. The valves didnt improve that much but the piston domes are totally clean 66k and no trace of carbon! I ran 16oz gm to engine clean, 32oz toyota engine clean + 16oz washer fluid @ 4k rpm. In the last week my fuel trim is down to 2.1%... damn near perfect.. I doubt ill be seeing any misfires for a long time
02-28-12 | 05:01 PM
#742
Driver
Joined: May 2011
Posts: 123
Likes: 0
From: NJ
the pistons are almost spotless, the valves not so much.... I will keep a close eye on how long it lasts since the problem is in the valves in the first place.
the last pictures of the piston dome are 1) the etching with the wrist pin size & 2) the wedge where the injector fires on. Note that all that buildup is still after I filled those ports w/ top engine clean and let them sit and soak in it for about 1/2 hour on a hot engine.
the last pictures of the piston dome are 1) the etching with the wrist pin size & 2) the wedge where the injector fires on. Note that all that buildup is still after I filled those ports w/ top engine clean and let them sit and soak in it for about 1/2 hour on a hot engine.
02-28-12 | 10:54 PM
#746
The pictures actually look pretty good. I've seen a lot worse. There's nothing in those pictures I'd call alarming. I've seen intakes so coked up it was a marvel the engine ran at all, but it was carbureted so it won't have the same problems with driveability an injected engine will.
All in all, I'd say your clean up did a pretty impressive job (without before pics anyway...).
All in all, I'd say your clean up did a pretty impressive job (without before pics anyway...).
02-29-12 | 06:44 AM
#747
Pole Position
Joined: Apr 2010
Posts: 392
Likes: 0
From: Montreal, QC
My dealer told me today that my car was eligible for the TSB, but I actually had to have rough idle issues before they can do the fix. Any way to precipitate symptoms?
02-29-12 | 01:32 PM
#748
last time i was at the dealer i explained to my service advisor that a couple times my car had a rough idle when at a stoplight. He said just to get the fuel injectors cleaned. they said they could do the service. I guess i got shorthanded as I had to pay for it.
02-29-12 | 02:20 PM
#749
Jeff
02-29-12 | 04:46 PM
#750
2008 IS250, 45000 miles, about to go out of 4 year limited warranty. Had a very slight rattling noise under light acceleration from cold (never really went away but got less when the engine was hot). Didn't have a significant hot idle problem and the car never misfired or threw a code.
Dealer called today and they are going to do the piston ring fix. I was a bit leery of this as the noise was minimal but they said it would only get worse. Will post when I get the car back.
Dealer called today and they are going to do the piston ring fix. I was a bit leery of this as the noise was minimal but they said it would only get worse. Will post when I get the car back.