1989porsche928

Hello, I am trying to take apart a 928 S4 engine. So far I have the engine on an engine stand (cylinder heads are already off). I turned the engine upside down and removed the oil pan. I have the workshop manual but it only shows a picture of the engine and not really how to take it apart. Do you guys no what bolts to take off first? Do I try and split the engine in half then remove pistons, rods and crank? thanks

Kevin in Atlanta

Remove rod end nuts to remove rod and piston together. Use a hammer handle to tap the piston out of its bore. Split the the block to remove the crank.

928 at last

Sorry, but "Split the block"?

1989porsche928

ill upload a picture in a few seconds

1989porsche928

I thought the engine splits in half by removing some of the bolts. From the image below I just have to unbolt the rod ends from the crankshaft and slide the pistons and rods out of the bottom? thanks

1989porsche928

to prevent damage, can someone please circle the bolts I need to take off to split the engine? thanks I am assuming it is the ones on the outside

James Bailey

the lower cradle has the crank bearing journal caps as a part of the casting...so yes you spilt the block by removing the whole cradle. Then you can lift out the crank.

James Bailey

All of them.....the big journal bolts as well all of them !! The block 1/2s are glued together too. And the round oil pump needs to be undone before splitting.

James Bailey

for what reason are you taking it apart

1989porsche928

thanks for replaying. I circled what I believe are the first set of bolts that need to be taken off in yellow. The purple circles are the bolts to split the engine in half, can someone please confirm this. Also the gear circle is a engine wear and a seem. Can someone please let me know if this is normal or if the block is bad? thanks

1989porsche928

james i bought it off ebay for $250 and had it shipped to my friends house for $238. I am trying to rebuilt it. More of a learning experience.

1989porsche928

So I have to take all of accessories off the front of the engine to pull out the oil pump?

Mrmerlin

if you have not already procured a WSM it would be very wise for you to have one before you go any further

White Lightnin'

Very first post................

James Bailey

read up on crankshaft end play....and thrust bearing failure.. it is quite possible that that engine is NOT rebuildable....
ALSO note you MUST NOT hone the cylinders with a bottle brush hone.....it is not like a Chevy !!!