kelley5795

Sone of the Valves are bent anyone know where I can get new/used or should I just get new ones?
For a 1992 Lexus LS400

3UZFTE

Like valves in the cylinder head, (i.e. Intake/exhaust)? The best bet would be Toy/Lex, like sewell and what not, however some else might be able to help you out, like a local engine/cylinder head repair guy. There is a company called Cylinder Head Repair here in Minneapolis that is awesome with just about anything engine machining, valves, etc. However I am sure there is someone more local to you that would be just as knowledgeable and a little less expensive on shipping.

PureDrifter

iTrader: (10)

how do you know the valves are bent

kelley5795

Exhaust and intake and because when I test them they shake

PureDrifter

iTrader: (10)

how do you "test" them? please elaborate....

1uz motor commonly are in need of having the valves reshimmed but i've never head of anyone BENDING a valve that hadnt hydrolocked, detonated, or snapped a timing belt...

Amskeptic

This has been a remarkable read so far.
I was thinking, guides totally shot? Is this a head on the bench or fully installed?
Colin

PureDrifter

iTrader: (10)

guides are a possibility but are somewhat rare on the 1uz in terms of wearing to the point that there's a noticeable gap allowing them to shake.

fourthmeal

Running low on oil could definitely make this happen a lot sooner in the engine's life.

Doubt the valves are bent, though. Non-interference, and all.

kelley5795

Well see the car over heated so I took both heads to the shop and the left side gakset blew big time but the right side was ok but neededless to say both heads are okay but 2 seats in the left head were lefted so I had the heads shaved and 2 new seats and when they went to set the valves in the 2 new seats they said they were bent idk if they are wrong or not but that's what has happened

PureDrifter

iTrader: (10)

you have idiot mechanics or machinists.
valves dont bend that easily.

hell you're the first time i've even heard of a 1uz blowing a headgasket. most just survive the overheating.

Amskeptic

Any time you install new seats after an overheat, there is a question of seat recession and concentricity. Valves do not bend for any other reason than severe contact. If your cams were out at disassembly, it is not likely that you had a valve (2 in the Lexus) stuck open when you sat it on the bench or wherever. If you had a blown head gasket with coolant in the cylinder, it, again, is unlikely that you had a hydrostatic lock that could have damaged valves. And, as mentioned, these are non-interference engines, so how did the valves get "bent"?

My guess is that you have concentricity issues. New guides, a prayer, and a serious 3-angle grind may work.
Colin

kelley5795

So I have all the valves cleaned should I just set them back in and go ahead with putting the eng back together? And the gasket was very bad!! The right one was close to blowing too

JBrady

Overheating can create all kinds of problems. Honestly, a used engine would be cheaper, quicker, easier and likely more reliable. Check ebay and local salvage yards.