Using a 2.4L engine in a 2.3L Turbo

wagone · Post by **wagone** » 15 Jun 2013, 18:43

The head gasket in my new(to me) '96 850 Turbo decided to blow today. I don't really have the time to replace the gasket right now. I do, however, have a wrecked '97 850 GLT, which has the 2.4L low pressure turbo engine in it. If I swap the 2.4L into my Turbo, would it be possible to run it with the stock tune if I also swap the injectors and the turbo? I know the block can't handle as much boost, but I need to get my car running quickly.

Post by **jimmy57** » 15 Jun 2013, 22:01

If you substitute the turbo and injectors from the 2.3 it will be fine. Actually better than fine. You'll need to run premium fuel if you are going to drive it hard as it will have a higher compression ratio and a bit more tendency to spark knock.
The thinner cylinder wall thickness is fine if you don't set boost pressure higher. With the larger displacement and higher compression ratio you will not need more than stock boost to end up with a more potent engine.

wagone · Post by **wagone** » 15 Jun 2013, 23:09

Thanks! That's exactly what I was hoping to hear

Keith19851985 · Post by **Keith19851985** » 26 May 2018, 19:29

So it is ok to replace 95 Volvo 850 2.3l with a turbo 2.4 850 engine does everything fit like it’s supposed to

Post by **RickHaleParker** » 26 May 2018, 20:15

The AME '96 and '97 850 did not come with 2.4, all engines where 2.3 or 2.5.

'96 AME 850, all the turbo charged engines are 2.3, all the NA engines are 2.5.
The turbo engines for '96 are B5234FT, B5234T4 and B5234T5

'97 AME 850, ,the two turbo charged engines where B5234FT and B5254T.

I'm getting this information from VIDA, there is conflicting information from different sources.
You should look at the ID plates imprinted on the engine block of both engine to determine what you have.

Post by **RickHaleParker** » 26 May 2018, 20:36

"So it is ok to replace 95 Volvo 850 2.3l with a turbo 2.4 850 engine does everything fit like it’s supposed to"

Mechanical the replacement engine will fit. Based on the information you have posted so far, it is highly probable Jimmy's answer is correct, the systems will play well together. For a more defendant answer, read and post the engine family IDs off both engines.

Post by **erikv11** » 27 May 2018, 09:59

Keith19851985 wrote: ↑26 May 2018, 19:29 So it is ok to replace 95 Volvo 850 2.3l with a turbo 2.4 850 engine does everything fit like it’s supposed to

If by 2.4 you mean the engine from a 1997 low-pressure turbo 850, then yes people do it all the time. Keep the turbo and injectors from the 2.3 setup when you drop it in. If you mean some other engine, just tell us where it came from.

However dropping in a 2.4 NA (non-turbo) 850 engine is not a good idea.

Post by **FLXC90** » 27 May 2018, 14:47

Based on your info in the first block, YES

Post by **FLXC90** » 27 May 2018, 15:57

Wiki says
The B5254T is a 2.5 L (2,435 cc) straight-five. It is turbocharged and intercooled with a power output 193 PS (142 kW; 190 hp)[153] at 5100 rpm,[110] with 270 N⋅m (200 lb⋅ft) of torque at 1800–5000 rpm.[110] It is equipped with Bosch Motronic 4.4 engine management for model years 1997 and 1998.[154] It is equipped with Bosch ME7 engine management for model year 1999. Boost pressure is limited to 6 psi (41 kPa).[155]
Applications:
1997[103] Volvo 850 badged as 850 AWD or 850 2.5T

Chiltons lists B5254T as VIN 56 LPT 2,4 for 96, 97 850 GLT in American Market

The bore and stroke are the same as the code 55 N/A 2.4l whiteblock, the 2.5 labeling was a market limits thing, I imagine.

This is all semantics, as stated above, look at engine series, if it was originally a B52X4T (or FT) then it is a turbo motor.

Keith19851985 · Post by **Keith19851985** » 02 Jul 2018, 15:28

What happens if I replace my 2.3 turbo with a 2.4 non turbo what would I have to change I can get a 2.4 n/a cheap and easy down street. My 2.3 turned into a steam engine