How Good is The B230K Engine

[Clan]

Originally Posted by Chesh740R

The B230K fitted to a 740 used the 631 Cylinder head. Its a flat head and there is no combustion chamber within the head. The combustion is all done within the the cylinder bores. So it is a key maintance item to replace the cambelt within the service intervals, as if it snaps it will cause contace and damage the valves.

The cambelt snapped 2k short of its service interval, heres one of the valves, quite a few had to pressed out of the head.



The B230A uses a convential head set up most probably a 405 head or a 530, not to sure to because never had any of these engines in my possesion. Also the b230k has a head mounted distributor where as b230A's have a convential Dizzy mounted in the block

My father had a 87 740GL with the B230K from new and it was a fine car and the only faults it had were the mechanical Fuel pump packed up, and we changed the pierburg carb to a brand new webber as the pierburg carb seemed to be probelematic with its auto choke, this was around 125k.

Its milege as i recall correctly was around 160k at the time and it was still going strong.

Other than that a great engine in a fine car and if it hadnt been written off in 1998 by some lowlife drunk driver ploughing into it i think my dad would still be driving it to this day or it would have been kept as a runabout in the family.

At least it died saving my dad's life.

RIP D163 EVC a truely fine car.

That Engine is not A B230K it is a B230KH and comes with extra emission gear . H stands for Heron , which is the type of head you explained pretty well .

[skidje]

Originally Posted by Clan

That Engine is not A B230K it is a B230KH and comes with extra emission gear . H stands for Heron , which is the type of head you explained pretty well .

Hi Clan, So the B230K is a similar engine to B230A? Since I saw an engine with 530 head. Whereas I also thought that the B230K always had heron heads. Any idea what CR this B230K engine has from the 700 series? I need a high compression enginion and came across this B230K with an old chap who is selling. And it looks like it never ran in his 700 series with automatic gearbox.

[classicswede]

The early K is basically a A engine but with the twin choke carb. Later K engines can be identified by the 631 head

[skidje]

Are these engines really with car 10.3?
I need the bases to replace a B230E running LPG and besides fueling seems the engines are quite alike

[skidje]

Originally Posted by skidje

Are these engines really with car 10.3?
I need the bases to replace a B230E running LPG and besides fueling seems the engines are quite alike

Compression ratio 10.3

Sorry

[classicswede]

If looking at the B230K with 530 head head the dish in the pistons is about the same as a B230A/E engine

Are you looking at just slapping in a used bottom end or building a engine optimised for LPG?

[Clan]

Originally Posted by skidje

Hi Clan, So the B230K is a similar engine to B230A? Since I saw an engine with 530 head. Whereas I also thought that the B230K always had heron heads. Any idea what CR this B230K engine has from the 700 series? I need a high compression enginion and came across this B230K with an old chap who is selling. And it looks like it never ran in his 700 series with automatic gearbox.

The B230FK is 8.7:1

[skidje]

Originally Posted by classicswede

If looking at the B230K with 530 head head the dish in the pistons is about the same as a B230A/E engine

Are you looking at just slapping in a used bottom end or building a engine optimised for LPG?

Optimized for lpg. The 245 runs already 15 years with an B230E KJet inlet. Inlet and outlet will be transferred to new engine Incl of ignition.. I would assume the B230K can do the job after lowering the head with 0,5 - 1.0 mm or so. Any advice welcome..

[classicswede]

Flat top pistons would be one good way of raising the CR. Another option that would be good is to for a 86mm crank raising the CC and in turn giving a little increase in CR to match