I'm fixing my girlfriend's 1995 850 Turbo and need to find out if a '98 V70 AWD engine will work for me.

Does anyone know if this will work and/or where I can find more info on this?

Thanks!

Bryan
wwrafter@yahoo.com

The 98 AWD turbo engine is a low pressure turbo and is a bit
different then the high pressure turbo engine in the 95 now.
I think you could do it but it is not a straight swap. Some internal
engine parts are different (the 95 has smaller piston diameter
since it has a smaller displacement). The electronics for engine
management would have to be swapped and the intake plumbing might
be a bit different. Mid-year 98s have a different timing belt
tensioner and the turbo's are different, too. Probably lots
of other small differences like this that can be overcome with some
work or fabrication. I'm not sure if the AWD electronics would
expect a rear drive component (I doubt it).

If it were me, I'd shoot for a straight year-for-year swap unless
you want a longer term project car.

What exactly are you fixing?

Thanks for your response. Now I have more questions... :)

I'm fixing a '95 850 Turbo. I'm told that the V70 engine is a Turbo engine and it was AWD.

What might the different engine characteristics that these have mean? Power? Gas mileage?

I'm planning on using the 850 transmission, intake, turbo (and maybe exhaust manifold if necessary - I think they're the same), computer, wiring harness. I know the intake needs to be swapped and was planning on swapping the wiring harness as well, but what else might need changing and why?

Thanks!

After re-reading this, what threw me yesterday was that you want to swap electronics and wiring harnesses......Do NOT do that!
IF you simply have both engines out, make sure that the '98 engine (no manifolds) has the exact same swapped '95 sensors (all) and you shouldn't have any problems. Swapping wiring harneses, ECUs would be a major project and should not be attempted, no good reason either.

Thanks for you replies, Frank. I'm thinking about going for a year for year swap now, but there's a few things that I've been considering:

1. The '98 engine has only 3200 miles on it, the '95 engines all have around 140k on them.

2. I wasn't going to swap wiring harnesses for the '98 one, just move the '95 ones to the '98 engine - so I was swapping the harness that is on the '98 engine for the '95.

So, just to make sure, if the engines had the same sensors in the same locations and I used the '95 wiring, manifold and turbo, with what certainty would you say that this engine would work? How do I find out if they have the same internal specifications? Can I check with #'s or anything?

Thanks!

Bryan

The engine internals are going to be so close, if not the same that it won't matter. IF everything bolts up (and no, I'm not 100% sure as I havent tryed it myself), then it'll work just fine w/o problems. If there are any differences in HP, the difference would be slight and I highly doubt that you'ld notice.

Do you know where I can find out how close the internals are? I got another response that said that they'd be quite different.

Thanks.

B

IMHO, do NOT even begin to attempt that swap as I highly doubt that most people could succesfully do all that WO many serious problems/headaches. There are MANY differences between model year products (Volvo changes many things EVERY year) and even IF the same model year, the differences in the cars between turbo and NA are far more numerous than just the obvious few items. They're essentially totally different cars. There are more things than I care to begin listing here.
It's a job that to do correctly would take a very experienced, educated Volvo master tech with years of experience AND all the wiring manuals, etc many days to successfully complete and even then, that person would still have many problems, headaches.

It's far better to just buy a turbo car IF one wants a turbo car.

Sorry, I failed to see that it's a turbo 850, not NA.
I'd still try keeping to an engine from the same year or close.

I can't answer on the details of the swap. The engine in the V70AWD
is a 2.4L low pressure turbo. It runs less boost then the 95's engine;
has a higher compression ratio and fewer internal mods for handling the
stress of a turbo application. The turbo is on the V70 AWD is lso
smaller to spin up faster. Basically, the low pressure turbo engines
(LPT), found in the V70 AWD and GLT models from 1997 on, are more tuned
for torque. They are also kept under 200 horse power because that is a
magic number for insurance and taxes in some countries (the 95s is about
222HP now).

If you bolt on the 95 turbo and electronics to a LPT you will probably
over boost the LPT engine. With the initial higher compression ratio
this might cause some pinging or other problems. There are after market
kits to get more boost for the LPT engines and I think they do boost it
close to the stock boost pressure in the high pressure turbo (the 95
turbo has a high pressure turbo [HPT} engine). Maybe an owner of an LPT
engine using one of these "chip" kits could comment on how well the LPT
works when run at boost pressures closer to the HPT engine.