Thinking about buying a buggered 4agze

[PHAT|GTZ]

One of my mates buggered his 4agze, so he's got a new motor in and is selling the old motor.

Apparantly it was blowing heaps of smoke out before changing motors. Also said that the bearings needed to be changed, just want to know at wat sorta price im looking at to change the bearings and rings. I have a mate thats a mechanic so will give me a hand with changing them.

Also anything else that i should look out for?

[ChaosAD]

About the same price as buying another second hand gze (1500ish)

[M R 2 Mk1]

except unlike a second hand good 4agze you will know precisely what your engine has been through

[PHAT|GTZ]

far out, does it cost $1200 for new rings and new bearings? pretty crazy!!

[matt dunn]

far out, does it cost $1200 for new rings and new bearings? pretty crazy!!

If you remove the rods fromit you will have to replace the rod bolts as well or eventually it will toss a rod as they stretch and come undone.
Have seen it happen on a few engines now.

[PHAT|GTZ]

Well how much approx for the rings, bearings and any other NECESSARY parts that i would need, just so that i can get an idea of how much i will have to spend to get it to work properly again.

I know i gota get gaskets and stuff like that again...

[mike86ze]

let your fingers do the walking man

johnsons piston rings would be a good start.

if you torque everything back up to spec it shouldn't matter if they have or haven't stretched.

[suberimakuri]

glen eden engine reconditioners.

[ChaosAD]

I think that was a full rebuild. hot tanked block/head, new gaskets/seals allround, new pistons/rings, new bearings, new bolts, reconned oil pump etc.
That was just the long-block though, not touching the s/c, plugs, oil change and all that.

[Bazda]

for rings and bearings is not that expensive, the expensive part is labour but yoru gonna do that yoru self.

i've changed my pistons once and used the same gudgen pins, then i changed two more and used the same gudgen pins and so far no probs....touchwood.

[bridgeport]

yeah rebuild a shitter is better than buying one that ya dont know the condition of

[Farmer_dave]

I am guessing that it all depends on how bad the damage is, ie: if the bores are damaged and or conrods and crankshaft then its gonna be big bucks if its just pistons rings bearings should be less than a grand.

[RedMist]

Rod bolts shouldn't ever be used again. When you torque a rod up the torque settings are for a new rod. Not one that's already stretched. Your asking for troubles using used ones.
I'd also expect to have the block line bored and honed again. Really not cheap at all... to do right.


Daniel.

[matt dunn]

let your fingers do the walking man

johnsons piston rings would be a good start.

if you torque everything back up to spec it shouldn't matter if they have or haven't stretched.

They are one time users. Once youv'e let then tension go they will keep stretching even after you've torqued them up. They will loosen off again in use and come undone!!

[Twolitre]

If you remove the rods fromit you will have to replace the rod bolts as well or eventually it will toss a rod as they stretch and come undone.
Have seen it happen on a few engines now.

Hi Matt does the same rule about big ends (conrod) bearings apply to main (crankshaft) bearings.
ie. will I have/should replace my mains with new/aftermarket bolts/studs?

[Mr Revhead]

i can help with parts to rebuild, email me a list of what you will need and what the engine is from (model and frame numbers if you can)
and ill do the best prices
warwick.parts@bowater.toyota.co.nz
cheers.

as far as the bolts go toyota use 'torque to yeild' bolts on things like head bolts, rod bolts and main caps. (but not for every engine) best to use new ones as they are a lot cheaper than a new engine!

[mike86ze]

as far as the bolts go toyota use 'torque to yeild' bolts on things like head bolts, rod bolts and main caps. (but not for every engine) best to use new ones as they are a lot cheaper than a new engine!

That answers my next question as i assumed they wouldnt torque them to yeild
but if that is the case then once a bolt has been bought to yield then any more force (over and above) then it will plastically deform (stretch). And if you reuse a bolt and torque it up to the same place, above yeild, then the same conditions apply, so why is it going to stretch/creep/deform more the second time round?

i have reused them before on toyota engines and they havent dropped a rod. I know just cos i've gotten away with something doesn't make it a good idea though.

[Mr Revhead]

you can reuse them..... theres specs in the manual to check them with... they stretch to a point then break or lose their strength making prone to failure. if you can replace them do so. only reuse if you can check the specs.
but at the end of the day i would replace them.... as a rule our workshop replaces them and only reuse if they cant get any new ones and then only if they meet specs

[mike86ze]

fair enough. being high tensile they woulnt want to stretch to much no.