Melting Pistons

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GeoKez

GeoKez

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Joined
Nov 3, 2012
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Location
Perth
Thought I'd share this.
*Edited on advice* While looking for that perfect first car for our eldest teenager............The latest arrival is a MR2 GT (Bathurst?) just cause it looked interesting to work on, and Wifey had always wanted one. It was advertised as having issues, and when I spoke to the young fella, he said "it let go at 4000 in third and the engine light came on. Mate had a look and it has no compression in No 3. cylinder".

So after the normal haggle it came home with us.

photo 2.JPG

A quick strip,

photo 3.JPG

and HOLY MELTED PISTONS BATMAN.

photo 1.JPG

He has since been reported the RSPCC. It was a good laugh thou, you should have seen the bottom of the sump. Poor car.
 
I disagree, Mr 2's make it really easy to decide when you need to drop the engine.

Timing belt = drop engine
Head gasket = drop engine
Valve clearence = drop engine
Air con re-gas = drop engine
Oil change = drop engine
Change spark plug = drop engine

One of Toyota's less remarkable achievements of forward thinking.
 
Geo&Kaz... you couldnt have put it better ! And the cylinder blocks are a joke. Anything more than 1 bar boost, and No2 cylinder bore splits 20mm below the deck where it adjoins #3 bore ( water way cast in the block makes them SUPER thin right where it counts the most at max cylinder compression, and the blocks split around the water pump area). and the 10mm head studs stretch , and the poor design unsupported water galley on the exhaust side of the cylinder head just begs for leaky head gaskets ! Want to replace a "simple" coolant hose , or water gasket ? MMmm that means virtually stripping the entire outside of the engine to get to anything. Dont you love it how its all multilayered on top of EVERYthing !

Even Neal Bates said you just have to run a TRD block if you want to reliably make power...at $5000 a block !

Used to work on a few, but I'm a bit over them now ....
 
:) Fun ey!!

If I wanted to make it bullet proof, 3VZ-FE (Camry V6) and be done with it! Glady I have no intention other than getting it going in stock trim.
 
There is a V6 Supercharged MR2 here in Vic.... not bloody bad on power!


I remember working on SW20's.... its either lying on your back or lying on your stomach for hours..... either way, you are sore....
 
toyotas are a prick to work on our hi ace vans love to spit head gaskets in our 8 cars we've clocked a cumulative total of about 2million km and in those 2M we've replaced 3 heads 8 head gaskets an entire block 10 thermo fan assemblies 5 gearboxes and 4 diffs. i can now change a 2tr-fe engine heads etc and can replace the live rearends diff in 20 minutes
 
Spent the arvo trying to get the remainder of that piston off the cylinder wall. Thanks to getting the heads up off Brian, some wet and dry and battery acid, and the block may just get away with a hone. Beers for you next time you get up this way B, appreciate the advice. :thumbsup:

I spent my younger years dicking around with pinto's in Escorts................everything after that seems hard.
 
Geo&Kez said:
I disagree, Mr 2's make it really easy to decide when you need to drop the engine.

Timing belt = drop engine
Head gasket = drop engine
Valve clearence = drop engine
Air con re-gas = drop engine
Oil change = drop engine
Change spark plug = drop engine

One of Toyota's less remarkable achievements of forward thinking.
Click to expand...
lol bit like a pulsar gtir :fuuuuu:

I just don't like when the milk create tries to slip out from under me :fuuuuu:

being short is a big disadvantage
 
blackvr said:
Geo&Kaz... you couldnt have put it better ! And the cylinder blocks are a joke. Anything more than 1 bar boost, and No2 cylinder bore splits 20mm below the deck where it adjoins #3 bore ( water way cast in the block makes them SUPER thin right where it counts the most at max cylinder compression, and the blocks split around the water pump area). and the 10mm head studs stretch , and the poor design unsupported water galley on the exhaust side of the cylinder head just begs for leaky head gaskets ! Want to replace a "simple" coolant hose , or water gasket ? MMmm that means virtually stripping the entire outside of the engine to get to anything. Dont you love it how its all multilayered on top of EVERYthing !

Even Neal Bates said you just have to run a TRD block if you want to reliably make power...at $5000 a block !

Used to work on a few, but I'm a bit over them now ....
Click to expand...
are they that bad ? we only ever used gT2871R's making 240 kws , we would have been right on the edge , so if it knocks instead or ring landings breaking the block splits in half, that makes sense I mean the engines gota come out anyway .

I remember watching a clip on you tube it was all about the gt500 supra and the 3sgte TRD development ( slightly relevant so I thought I would just throw in there :w00t: )
 
jack of all said:
Was it red and had a wireless?
Mine was a bright yellow hj. Flat out at 143kmh.
Click to expand...
it was a few different colours , grey and orange spray putty/primer the roof was a rust colour - vinyl roof removed , I fitted a 3.55 diff ratio for better acceleration which hurt top end performance , had to be careful if turning and acceleration if you caught the curb and landed while accelerating its was pretty much guaranteed to break an axle with the 3.55's, I almost forgot the high comp sticker on the rocker cover , I reckon 130-135km on a 10 degrees decline 15 knot tail wind on a 30 km stretch of road 135km would have been possible but I was never lucky enough to get that combination of conditions , I guess I'll never know
 
Heh heh, I can go better than that! First car was a 1966 Humber Sceptre, auto. Would max out at 60 mph (this was in the UK), I got it up to 70mph down a long hill once and with every tank of fuel the engine required a litre of oil. This was many many years ago, shall we say about the time M Thatcher became Prime Minister...

Learnt quite alot about pushrod engines, carburettors, mechanical points, all very relevant to my 4g93T :wub: !
 
HJ Kingswood for me. Good old 202 + trimatic. I was always pulling it apart whenever I was bored. Miss that car :(

George, what's this battery acid trick?
 
I loved my HJ 60 Landcruiser, 3.5" lift, ran a garrett T3 on it lol. I could push a 20L bucket under it to drop the oil and sit in the engine bay if I needed to work on it.

I think the RVR is easy to work on, mainly because most of the stuff is either ripped out and binned, or relocated! :w00t:

The Toyota mechanics must have cringed when an MR2 came in for anything other than a std service.
 
George, what's this battery acid trick?


Brian learned me about it. Cast block with ally piston melted on it, you use some battery acid (or commercial sulphuric) and a bit of scotch brite and it goes a good way to getting the bore clean. I still ended up having to machine that block but came really close to only needing a hone.

I'd forgotten about this thread. Been a few cars under the bridge since that bitch of a thing. I'd hate to say it, but the good old ford focus has become my new favourite car to work on. So easy, with great little features like being able to adjust cam timing without needing vernier cam gears. Few weeks ago, did an engine change on one in about 4 hrs single handed. The zetec power units are a pretty forgiving little unit if you treat them right.
 

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