4.6 Swap?

[Quimbola]

Might be a fun project!

If I do the work myself, how cheap can I do this for?

[Davis]

About $400 plus the price of a 4.6 long block

[evilfij]

Ya a 4.6 long block will do tons of good in a 94-95 d-90 :)

Heads are different, cam won't work, front cover won't work, oil pan won't work if its bosch, etc etc. etc. Buy a short block

Ron

[rover4x4]

mind my idiotness but whats the difference between short and long blocks.

[evilfij]

A few grand :-0

Short block is just the block, pistons, crank etc.

Long block includes (at least with rover) oil pan, cam, heads, front cover, water pump, rockers valve covers

[Davis]

Assuming he starts with his D90 3.9/4.0, what he will need to do is swap the valve covers, swap the oil pan, swap the front cover, add a cam and lifters that take the distributor (about $250), swap the front cover, get a spacer for the front pulley($30), some gaskets, a can of Right Stuff. Swap out the air management from the 3.9/4.0, new timing gear, and voila. About $400.


Ron, why would the heads not work? I must have missed something.

[evilfij]

Serp belt heads have different bosses that non-serp belt heads. makes bolting up ancilaries a challenege if you have the wrong ones.

So basically what you are saying davis is that he needs a short block and new heads from the long block, however.

1. heads rarely are "bad" beyond what a refurb would fix.
2. Bosch/GEMS heads are not a direct swap

Now on a 97 a GEMS 4.6 long block would be ideal but 94-95 all you can really use is the short block.

Ron

[rover4x4]

what about the 4.2? can you use the same "stuff" from the 3.9? I heard (emphasis) that the 4.2 was better than the 4.6 in regards to performance????