Roderunner wrote:Nothing is ever that simple, but it would make an interesting project ! I would expect to run into problems concerning piston pin height, conrod length, liner interference fit differences etc., wouldn't a complete 4jh1 be a better engine anyway?
geeves wrote:how do they compare as a motor. Everything I can find online suggests an industrial motor
geeves wrote:Ive heard of 4jg1 parts but never ever seen a reference to a 4jg1 engine. Is this a mythical beast of the same nature as a 4.88 diff?
superturbocompound wrote:
FINALLY!!!! got the pics and measurements, bore is 105mm, 3mm bigger then the 4jb1, bowl shape is a late model direct injection type so nozzle has to be changed...and the best thing is that the pin sits 2.5 mm higher meaning the 4jg1 piston is 2.5 mm lower then the 4jb1 , so can use the 4jg2 crank which has a stroke of 107 as compared to 102 on the 4jb1...do the maths 107mm-102mm = 5mm /2 = 2.5mm so the off set suits the 4jb1 block....looks like a plug and play aside from reboring the cylinder...doing a conversion now so will update from time to time...
superturbocompound wrote:reason not to use another engine block is when an engine is changed here, the car loses its 'GREEN' status hence 50% off the road tax...
progress report:-
there is about 3mm piston protrusion...2.5mm lower if it were the 4jg2 piston...so i think this will work....cranks spins freely not hitting anything (for the moment, dunno what happens when fully assembled)
Roderunner wrote: I didn't quite follow the piston differences between the 4jg2 and 4jg1.
Roderunner wrote:So is the 4jg1 piston going to protrude .5 m.m. out the top of the block?
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