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Steve_R1979

Active Member

• Nov 6, 2011

• #1

Sorry for the numerous questions over the last few days, but I have another!!

Lets say, for example, I picked up a 4.0 serpentine engine, and I wanted to run it using the v-belt arrangement from my 3.5.

Is this possible??

Assuming it is, is there any reason why it shouldn't be done??

Thanks!!!

Steve

 

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Steve_R1979

Active Member

• Nov 6, 2011

• #2

Ignore me

Found the answer!!!

 

Mr Noisy

Coming in your ears.

• Nov 6, 2011

• #3

What was it? You can't keep it to yourself!

 

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Steve_R1979

Active Member

• Nov 6, 2011

• #4

In my previous thread someone has put a 4.6 in and used v belts, so its fair to say its possible!!!

 

joe1972

Well-Known Member

• Nov 7, 2011

• #5

But why would ya?
Serp is a FAR better way of doin things.
I can say that as I've experienced both versions of the 3.9Efi... and to me the later serp type makes more sense

 

jamesmartin

Well-Known Member

• Nov 7, 2011

• #6

serpentine also has better water pump which feeds both sides more equally

 

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Steve_R1979

Active Member

• Nov 7, 2011

• #7

It just seemed simpler to me!!!

But then again, the V8's are new to me, still got a lot to learn!

 

crazydave

Member

• Nov 7, 2011

• #8

The 4 litre won't have a big hole in the top of the timing cover to stick a distributor in.

The best of both worlds is the late 3.9 timing cover, most common in post '94 ish discovery's, which has the better water pump, the better oil pump (crank driven), the serpentine belt, and still has provision for the dizzy.

I'm just presuming that you need the dizzy, to run your existing ignition system?

Hope that helps, Dave.

 

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POAH

New Member

• Nov 8, 2011

• #9

crazydave said:

The 4 litre won't have a big hole in the top of the timing cover to stick a distributor in.

The best of both worlds is the late 3.9 timing cover, most common in post '94 ish discovery's, which has the better water pump, the better oil pump (crank driven), the serpentine belt, and still has provision for the dizzy.

I'm just presuming that you need the dizzy, to run your existing ignition system?

Hope that helps, Dave.

Click to expand...

what he said

 

renton500

New Member

• Nov 9, 2011

• #10

I stuck with the v belts when upgrading to 4.6 to keep it original looking, so it wouldn't be so obvious it's had an engine change. Also because it would have meant more faffing about and i needed to get the engine swapped asap. I know the serpentine front gives a slight improvement, but it's minimal and the v belt system is working fine for me

 

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dirtydiscov8

New Member

• Nov 14, 2011

• #11

I may be wrong but I thought the serpentine engines had a longer crank nose to run the oil pump in the timing cover.

 

crazydave

Member

• Nov 14, 2011

• #12

No, thats the 4.0/4.6, but your not completely wrong.

The serp crank has a longer keyway machined in it, so using the serp front end on an older crank just means that the keyway isn't quite long enough to engage in the front pulley properly, which may at first cause a little concern, however, lots of manufacturers have long since done away with keyways (Ford especially) and rely entirely on friction (not even a tapered shaft) So just make sure the bolt is nice and tight and Bob's your Uncle.

If you use a 3.9 serp front end on a 4.6 crank, there is too much crank nose poking out of the front pulley, so a simple collar is needed to sandwich the pulley tight.