Hey guys, just wondered if you thought it would be possible to change the cams then drop off the sump, split the gearbox off n drop the crank, Rods n pistons out the bottom. Put pistons n rods on to the 1.3 crank n reassemble in reverse. reason for asking is I dont have a crane n no way of getting one. also I like to keep the original motor (auto block) hence no engine swapping . Cheers in advance guys.
High comp1.3 conversion
- Thread starter Dinky DK
- Start date
pistons will only come out the top of the block bud, needs the cylinder head off
I use a little jig that wraps around the piston n rings. Slide down the piston carefuly as you insert into the bores. Rings stay in place perfectly aslong as you lube everythin up well enough. Lil tip from workin on fiddly 2 stroke motorbikes. Comes apart aswell if ya need. Although id like to see if I can drop the crank without pulling the pistons down past the rings.
What im saying bud is that theres a lip at the bottom of a bore on a CG engine so the piston cannont be removed from the bottom / crank end. only out the top
frank
Club Member
the 1.3 rods are shorter tho
Like I say I dont want them to come right out. Just needs to be far enough to unbolt the rods from the crank
the 1.3 rods are shorter tho
would 1l piston n rod be to much compression on the 1.3 crank then frank?
frank
Club Member
you can remove the crank without touching the pistons, but you need to remove the side cover too tho (and hence the engine mount)
frank
Club Member
aye, the piston will poke out the top of the block about 15mm
pollyp
Club Member
can't pull pistons from below cos of this lip edge that forms the main bearing as skinner mentioned, pistons can only be removed from above with head off
to swap the crank with the block still mounted to the chassis will be very very difficult.
cos the crankshaft goes through the lower timing cover and the rear crank seal, you have to remove both these ends before ur able to drop the crank.
removing the lower timing cover requires detaching the RH engine mount, crank pulley, timing cover and then reattachingthe mount.
removing the rear main seal requires removing the gearbox & fly.
then you'd have to remove the head cos the pistons only come out from above.
then with the gearbox removed (which supported the engines LH) you'd have to find a way of supporting the LH of the engine block and stop it from rolling back forth.
then undo the crankcage bolts and carefully lower the crankcage and weighty crankshaft.
THEN go through basically a full rebuild sequence to fit the new crank and everything else.
imho I'd suggest either lowering the whole engine/gearbox assembly off the car via several jacks or hire/borrow a crane briefly for few quid, rebuild the engine away from the car and reinstall with the crane or jacks.
to swap the crank with the block still mounted to the chassis will be very very difficult.
cos the crankshaft goes through the lower timing cover and the rear crank seal, you have to remove both these ends before ur able to drop the crank.
removing the lower timing cover requires detaching the RH engine mount, crank pulley, timing cover and then reattachingthe mount.
removing the rear main seal requires removing the gearbox & fly.
then you'd have to remove the head cos the pistons only come out from above.
then with the gearbox removed (which supported the engines LH) you'd have to find a way of supporting the LH of the engine block and stop it from rolling back forth.
then undo the crankcage bolts and carefully lower the crankcage and weighty crankshaft.
THEN go through basically a full rebuild sequence to fit the new crank and everything else.
imho I'd suggest either lowering the whole engine/gearbox assembly off the car via several jacks or hire/borrow a crane briefly for few quid, rebuild the engine away from the car and reinstall with the crane or jacks.
aye, the piston will poke out the top of the block about 15mm
Nice one mate. New youd appear with the answer I need. So plan of action would be to remove the head, sump n timing cover, split the gearbox, drop the crank, lift out pistons n rods. 1l pistons on 1.3 rods. Pistons back in, 1.3 crank in. Set timing. Finish remainder in reverse of previous?
frank
Club Member
aye
you could lift the short block out with ease tho tbh (engine minus the head)Little more than id thought for. Might have to find a crane for a while.
frank
Club Member
i never use a crane personally (gonna change my engine tomorrow actually
) but it means removing the bumper tho.then the complete engine can be humped over the lower cross member no probs
frank
Club Member
thats expensive eh, but yards dont like breaking engines tho eh, they prefer to sell it complete
frank
Club Member
the going rate on ebay seems to be 120ish for a complete 1.3 lately, swapping pistons/rods is a mission btw !
all the same size eh, later coilpack stems are 2mm longer tho
Is that due to the solid lifters Frank?
Edit: or is that the CR engine im thinking of?
frank
Club Member
yes shimless paul, the last of the coilpacks and all the CR,s
Enuo
Glorified Electrician
My understanding was you just fit the 1.0 flat top pistons in a 1.3
yer i though you could fit the longer rods in too. i made a mistake it seems.
