smallblock erm blocks.

[stv-b16a]

are there any major differences between say a 1.2i block,1.2/1.3/1.4and a1.6 one? also is it really possible to fit a 16v head to these engines? some people ive spoken to say the ports ect wont match up, others say theyve seen it done.:confused:

[stafford]

ive seen a 1.6 16v bottom and a 1.6 8v top engine must work

[General Baxter]

psitons and crank are diff they will need changing

waste of time doing the conversion, just fit the entire 16v block

[stv-b16a]

yep thats what i thought. those guys were just talking bull****.

[stv-b16a]

what about differences in 8v blocks. eg 1.2i-1.4 eg crank

[stv-b16a]

general strength

[stv-b16a]

for instance could a 1.2i block handle more power as easy as say a 1.3 sr block could. or are they a pile of ****.

i know they are as standard. i drove one hard for about a year till the engine gave up .
i had to drive full throttle everywhere it was that slow, and i rarely even broke the speed limit lol nomatter what road it was on.

[stafford]

us the full bottom end off a 16 16v

[stv-b16a]

i am using a complete 1600 16v engine.

just wondering what to do with the old 1.2i lump.

scrap it or keep it and fit a new head inlet ect.

does anybody know about the 8 valve blocks?

i think there all mechanically similar, just need to know if there just as strong as each other.

[stafford]

i was gunna built a 1.6 16v bottom and 8v top wel worth it this rally guy has done it he worked at pro teck i think and he did it. this lad paid him to build him nearly the same engine, when we went to pick the engine up the guy took him out for a spin it went like **** of a shovel when they got back a guy come into the work shop askin wats in it thinkin its a 2.0. that engine is 160 bhp on paper its goin in the orange 1 off the front cover off total vauxhall if want to c the 1 im on about look at this site.

www.novatechuk.tk (http://www.novatechuk.tk)

[stv-b16a]

are you sure it was an 8valve?

[stafford]

if i could get pics up i would
defo 1.6 16v bottom and 1.6 8v top

[Stuart]

ive seen an 8v head on a 16v bottom end for a rally engine. so thats possible.
ive also seen a 1400 8v bottom end converted to 16V but its a bit of a dull job, having to get the cam belt end all drilled and tapped to take the idlers etc.
the blocks are fundamentally the same, jsut little bits here and there are different for mounts/pumps etc

[craig green]

Obviously the 8v blocks vary in terms of bore size etc. They are all plenty strong enough to take modifying so long as they are well serviced ie not phuckered.

As stuart has said though, its the little details that make them dissimilar & no point in persuing, for the sake of a couple hundred quid you could fit a complete Corsa GSi motor.

An 8v head on a 16v bottom end would need serious modding to lower the CR to a level you could fuel properly & run on a road car.

[stv-b16a]

thanks all, i think ill just scrap it! the 1.2i block that is.

what would cause this?
i took the head off last night(feck the bolts were tight) and one or two of them had like oil on the threads while the rest were spottless?

when i lifted the head off i found all this crud in the water channels ?

the bores were spotless not a mark?

i thought this motor would have been spottless as my granny owned it from new and only put 5600 miles on it 13 years. it was thick white crud and one of the passages was a bit blocked. also the exhaust valves were different colour some were black and some were alot lighter. i think ill scrap it.

[stv-b16a]

sorry 56000 lol

[Stuart]

it will jsut be crap thats built up from lots of short journeys

[stv-b16a]

fair point stuart

the bores were absolutely spottless i was well pleased,but a little disheartened by all the crap in the coolant channels.

my dad told me earlier that he had to go to my grans rescue a few years ago as the car just shut down on her.

turns out she had never put any oil in her for ages and it looked like it had overheated.
she didnt know it needed oil lol.

not such a minter after all lol

what effect would this have had?

[Adam]

No oil pressure for about 20seconds would wreck it.

Gunk in the coolant passages can be flushed out.

Oil on the headbolt threads would have probably just leaked onto them from the oil passages when you started undo them.

Have you heard it running recently?

[stv-b16a]

it ran ok

bit rattily actually and i noticed a bit of wear on the cam.

to the right if im stood looking from the front. this is also were the valves and plug were blackened and the bolts had oil on the threads and the coolant channels were most blocked with crap. some of which was very hard and metalic.

i think the head gasket was slowly going.

[stv-b16a]

so do you think the block would be ok with a good flush and clean and a new head cus the old spi one was so **** im def just scrapping it.

if i knew the bottom end was as good as say a bigger cc one i might still fit an other head and bolt it all up. with a carb for fueling