Engine Rebuilding?

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Entaran

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Any of you guys probably has more experience in this than me....

If a motor's old and is running low on compression (EVENLY), then when I go to rebuild it, am I likely to need oversized pistons or bearings?

What causes a need for oversized pistons or bearings?

I found an off the shelf kit for the cruiser that is -significantly- cheaper than having a workshop do it and they just wanna know if I wanna go 20 over on pistons or whatever over on bearings. Yet I have no idea how I should check for this and do NOT want to order the wrong parts.

Barry? Jon? rob? evo00x?

Anyone?
 
Any of you guys probably has more experience in this than me....

If a motor's old and is running low on compression (EVENLY), then when I go to rebuild it, am I likely to need oversized pistons or bearings?

What causes a need for oversized pistons or bearings?

I found an off the shelf kit for the cruiser that is -significantly- cheaper than having a workshop do it and they just wanna know if I wanna go 20 over on pistons or whatever over on bearings. Yet I have no idea how I should check for this and do NOT want to order the wrong parts.

Barry? Jon? rob? evo00x?

Anyone?
 
Any of you guys probably has more experience in this than me....

If a motor's old and is running low on compression (EVENLY), then when I go to rebuild it, am I likely to need oversized pistons or bearings?

What causes a need for oversized pistons or bearings?

I found an off the shelf kit for the cruiser that is -significantly- cheaper than having a workshop do it and they just wanna know if I wanna go 20 over on pistons or whatever over on bearings. Yet I have no idea how I should check for this and do NOT want to order the wrong parts.

Barry? Jon? rob? evo00x?

Anyone?
 
its well worth it to go oversize.
will be alot better than just rings and bearings

but..

has it been rebuilt before?

what is the condition of the crank etc...a mate of mine just rebuilt his
and it neededd a new crank aswell.(these engines are hard on cranks)
and parts from toyota are very expensive.

also the torque setting on the harmonic balancer is so high on these
something like 700nm, so make sure this is checked and correct.

because it will through the balancer straight away.hope this helps.

i would not order anything until the engine has been measured up
and you know what size is required.

you could get caught.
 
its well worth it to go oversize.
will be alot better than just rings and bearings

but..

has it been rebuilt before?

what is the condition of the crank etc...a mate of mine just rebuilt his
and it neededd a new crank aswell.(these engines are hard on cranks)
and parts from toyota are very expensive.

also the torque setting on the harmonic balancer is so high on these
something like 700nm, so make sure this is checked and correct.

because it will through the balancer straight away.hope this helps.

i would not order anything until the engine has been measured up
and you know what size is required.

you could get caught.
 
its well worth it to go oversize.
will be alot better than just rings and bearings

but..

has it been rebuilt before?

what is the condition of the crank etc...a mate of mine just rebuilt his
and it neededd a new crank aswell.(these engines are hard on cranks)
and parts from toyota are very expensive.

also the torque setting on the harmonic balancer is so high on these
something like 700nm, so make sure this is checked and correct.

because it will through the balancer straight away.hope this helps.

i would not order anything until the engine has been measured up
and you know what size is required.

you could get caught.
 
would be the best way to go i reckon,

takes away the guess work, especially if you are unsure
of the history of the engine
 
would be the best way to go i reckon,

takes away the guess work, especially if you are unsure
of the history of the engine
 
would be the best way to go i reckon,

takes away the guess work, especially if you are unsure
of the history of the engine
 
plus no need to waste time and $$ if you havent evn looked at the crank or bore condishions/wear.
 
plus no need to waste time and $$ if you havent evn looked at the crank or bore condishions/wear.
 
plus no need to waste time and $$ if you havent evn looked at the crank or bore condishions/wear.
 
How many K's on the engine? Would it have been rebuilt before?
Chances are if it has been built before it would have been bored 20thou already, especially if there was scoring in the cylinders.

If it is scored again, you may need to go 40thou over, but I'm not sure how much tolerance those engines have on boring.

Best bet is to strip it and get the tolerances checked.
 
How many K's on the engine? Would it have been rebuilt before?
Chances are if it has been built before it would have been bored 20thou already, especially if there was scoring in the cylinders.

If it is scored again, you may need to go 40thou over, but I'm not sure how much tolerance those engines have on boring.

Best bet is to strip it and get the tolerances checked.
 

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