Toyspeed.org.nz Message Board

by **mega4a** » Wed Apr 10, 2013 3:26 pm

rats lol i wonder if you could get brand new block from toyota? do 20v blocks have oil squirters?

by **Mr Revhead** » Wed Apr 10, 2013 4:03 pm

You'll find a block for next to nothing easy as.
Yes they do,

by **mega4a** » Wed Apr 10, 2013 4:13 pm

just need to find a low km 20v block then i guess and put my crank and rods in i guess ill have to replace that one piston.

OMG so shiny! · by **Dell'Orto** » Wed Apr 10, 2013 7:10 pm

Do you have a different temp gauge to measure temp? Those vertical score mark would suggest that at some stage it has been and the piston has picked up in the bore. Could be unrelated, but still.

by **mega4a** » Wed Apr 10, 2013 8:32 pm

Dell'Orto wrote:Do you have a different temp gauge to measure temp? Those vertical score mark would suggest that at some stage it has been and the piston has picked up in the bore. Could be unrelated, but still.

i have two one for mega squirt and one that goes to dash. has been what?

by **Lloyd** » Wed Apr 10, 2013 8:40 pm

Hot. I wondered too when you said it had been all machined and there are obvious marks in the bore

by **mega4a** » Wed Apr 10, 2013 8:44 pm

by **mega4a** » Wed Apr 10, 2013 8:45 pm

those are the other three. as you can see the block is quite rusty

by **mega4a** » Wed Apr 10, 2013 8:58 pm

i think the scoring would just be from fine bits of metal from when the chunk of metal broke..

by **Mr Revhead** » Wed Apr 10, 2013 9:00 pm

No, I don;t think it's that kind of scoring
Looks to be a pretty even pattern there. If it was metal it would be a mess and all over the place.
Plus, how would it get there in all cylinders? Also oil would be full of shavings

by **mega4a** » Wed Apr 10, 2013 9:04 pm

mhmmm im not sure what the scoring is from then. number 4 looks to be allgood but 1 2 3 have scoring

by **mega4a** » Wed Apr 10, 2013 9:04 pm

no water in 4 either.

OMG so shiny! · by **Dell'Orto** » Wed Apr 10, 2013 9:16 pm

I bet if you strip it down the pistons will have shrunk too...how long was it running pre tune?

by **mega4a** » Wed Apr 10, 2013 9:33 pm

b4 tune 20,000 km

OMG so shiny! · by **Dell'Orto** » Wed Apr 10, 2013 9:38 pm

Number 4 is the clean one? Be interesting to see the state of the pistons when you pull it apart

by **tuff86** » Thu Apr 11, 2013 7:19 pm

Do you need a ze block? I may be able to help you.

by **4agtepwr** » Thu Apr 11, 2013 9:04 pm

Those scores are from foreign material making its way into the engine via the air intake or the engine not being cleaned properly when it was assembled , not the result of a heat related seizure.
A heat seizure will show across the pin bosses of the piston as that's where the most material is in the piston so with excessive heat that's where there is the most expansion.
Looking at that block i'd say it's due to it being so corroded, that has weakened the bore significantly. Boost is kind of irrelevant, cylinder pressure isn't but if it was making 240hp on 18 psi then cylinder pressure wouldn't have been that high. I'm going to say it was a tired old block that hasn't been looked after.

by **mega4a** » Thu Apr 11, 2013 9:15 pm

yes i would also agree just bad block the water galleries look very rusty too.

just bad luck i guess...

by **mega4a** » Sun Apr 14, 2013 3:44 pm

new block

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4agze block smashed.

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