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Gone from an independent tech which is previously master tech one of lexus dealership. He told me that i dont need this adjustment coz lexus has a very tight settings that he never experienced to re adjust for his entire 15years lexus career. Any thoughts about this coz i have a supercharged engine and im currently building this F as a track car.
My experience is the need for adjustment is really rare. My Supra has 155k miles on it, and every time I've checked the valve lash on it, it has been just fine. I've checked lash on my IS F twice now, and they've all been fine both times. The only concern I would have with a boosted engine is making sure the valve springs are stout enough. Blowers try to blow valves open on the intake side. Not something you really want to happen ever. That said, at the modest boost levels the IS F superchargers run, I really doubt there would be any issue at all. The 2JZ-GTE definitely ran into issues around 28 psi with stock springs according to my calculations.
My experience is the need for adjustment is really rare. My Supra has 155k miles on it, and every time I've checked the valve lash on it, it has been just fine. I've checked lash on my IS F twice now, and they've all been fine both times. The only concern I would have with a boosted engine is making sure the valve springs are stout enough. Blowers try to blow valves open on the intake side. Not something you really want to happen ever. That said, at the modest boost levels the IS F superchargers run, I really doubt there would be any issue at all. The 2JZ-GTE definitely ran into issues around 28 psi with stock springs according to my calculations.
Thank you lobuxracer for the inputs , now i got a peace of mind since as i remember my blower is only giving 7psi.
That's the entire list of them, yes. I only replaced what actually broke. I did not remove the big plastic piece from the top, there is no need to do that at all. I just had some of the smaller pieces get brittle from heat and crack when I removed them. Truth be told, the big piece will crumble in your fingers if you've got 100k miles or more on the car, so it's best to leave it completely alone unless you're OK with dropping ~$85 on replacing it too.
Truth be told, the big piece will crumble in your fingers if you've got 100k miles or more on the car, so it's best to leave it completely alone unless you're OK with dropping ~$85 on replacing it too.
Yuuup. she just hit 120k on saturday. and im not the first owner. so i def wanna see how shes handling the miles and age. also Sending out for oil analysis at the same time.
Finally getting around to do this hopefully in the next month or so. the ISF hasnt been driven much over the year and thus been put on the back burner. but finally got around to ordering everything i needed. parts will all be in tomorrow including spark plugs and ill have it taken care of soon. i got quoted at 1050.00 and seeing that A) its beyond my skill level and B) itll be a trusted master tech handling it with near OCD scrutiny, im fine with paying it.
i was on the fence on doing this first or my exhaust. and even though i have my headers/tune/ intake from rrracing ready, this work will tell me a bit more about the health of the car and weather its worth bolting everything up or not.
Basically you do the measurements now and if any are out of spec you simply pull the cams and change them at the same time you do the timing chain. Or wait and do everything at once
Basically you do the measurements now and if any are out of spec you simply pull the cams and change them at the same time you do the timing chain. Or wait and do everything at once
Pretty much. I'll do some WOT runs and follow up with a dose of water to ensure there is no carbon on the exhaust seats and the measurements are good. I've seen carbon build up make a valve appear to be loose, only to later burn in service because it was actually fine once the carbon burned off. Once the valve is even slightly off the seat, it's bye bye valve and sometimes seat.
A wise tuner told me many years ago, a loose valve is a happy valve.
I'm still debating just pulling it apart and cleaning up the ports and seats for the next 180k miles.
WELP, car is at the shop and will be going under the knife sometime this week. ill hopefully have some updates for you guys.
I also provided the correct OEM sealant incase any visible signs of leaking plate is found while its open. and also provided them with spark plugs and all the accoutrements pointed out by lobuxracer (thank you again). mine is shy of 130k, so i figured getting all the seals done would be needed anyway.
If its never been done, and your at 130k doing this...get all the gaskets... hes replacing my filters and sent me this. Having a master tech for a friend is, I cant explain it...
If its never been done, and your at 130k doing this...get all the gaskets... hes replacing my filters and sent me this. Having a master tech for a friend is, I cant explain it...
Lol took me a while to understand what I was trying to see. Good one.
If its never been done, and your at 130k doing this...get all the gaskets... hes replacing my filters and sent me this. Having a master tech for a friend is, I cant explain it...
LOL, lookup the Tacoma water pump gasket. Maybe a common trend with Toyota?
12-16-18, 05:19 PM
