An engine drop in question, don't shout!!

How do.

Would a 90 2.5 petrol drop into a series 3 that had a 2.25 engine in it?

what would i need to change? if anything. As i know 2.5 litres were in series 3's too but i'd expect them to be different.

The reason why is in t'other thread.......

cheers.

Hi
Not sure about the 2.5 petrol but i did a 90 2.5 diesel and it went in fairly easy.

The battery tray has to be cut off and the battery relocted and one of the engine mount needs to be moved slightly i got over that problem by fitting slighty taller engine mounts

Not sure if this help

Chris

my series had a 2.5 Petrol. I dint put it in, but iit fitted easily - i think its the same block.

It's a straight swap.

straight swap? no changing mounts or bell housing, not even moving the battery?

would i need an uprated rad? i have a decent leccy dizzy and new coil so that'd be alright. Are the manifolds/downpipe unchanged too?

basically, my other thread atm has the details why i'm asking, the engine atm is popping and dont seem to be doin as well as it could, thats why i'm thinking of the 2.5

Not 100% sure about the exhaust but pretty sure all the other stuff's the same. Can't see the manifold being different but you should be able to tell by looking if you can have the two engines in the same place to compare.

suppose i could jsut bend some pipe in or something, could do it i suppose. Me engines a little shot tbh

I’ve put a petrol 2.3 from a 90 in my Series III I suspect it will be the same.
It depends how you define “Drop in”
The bolts will be metric, where as unless you have a late Series III yours will be imperial.
In theory you will have to enlarge the bellhousing holes to fit the metric studs. Mine fitted without, but of course I had to buy new nuts.
It had an electric fuel pump so I had to fit the Series mechanical one. The Series pump had a thicker side plate, so the metric bolts were too short, so I had to buy new bolts (this is getting expensive, but could have been a problem on a Sunday afternoon!).
The left had engine mounting is in the wrong place, but on the 2.3 there is a second set of holes that mounts the mounting ion the right place for the Series III. The plastic fan looked very close to the radiator, so I used the metal one. I think the bolts were too long, so I had to buy another 4 bolts! The bottom hose is different, I managed to heat it in a saucepan and stretch it over a broom handle till it fitted (I hope it never fails at the roadside, looks like an AA job!) I think I used the Series thermostat cover (More new studs?)

Manifolds. I took the easy way out and used the Series manifolds and carb that then bolted straight on to the exhaust. Obviously I will be loosing a bit of power, but not enough to worry about. I know people running 2.5s on the Series carb etc, probably loosing out a touch, but still better than a (knackered) 2 ¼! Had to change the breather pipes a bit.

The Ninety exhaust is a different diameter, so the exhaust won't bolt onto the 90 manifold, and the 90 front pipe won’t fit the Series exhaust. There are lots of ways round this depending on your skills (and/or how much you want to spend)

I have recently been told that if you cut the Series front pipe you can fit the bigger 90 clamping ring and it will then bolt (& seal) onto the 90 manifold. Obviously you will need to weld up the front pipe.

It’s a few years since I did it, but I think that’s about it. Not quite “drop in” but nothing difficult, and no welding (depending on what you do with the exhaust.) The hardest part was fitting the bottom hose!

I knew there was something else. The starter motor is different, and not interchangeable. Neither the Series nor the diesel starter will fit. Being pre-engaged it will need a bit of re-wiring.
It appears to be unique to the 90/110 petrols so is not common second-hand.

woo...... lol cheers for that mate