IPD sale XeMODeX - Experts in Volvo Electronics
Did you know? 🤔
Logged in users can get email notification of topic replies Log in or register (free).
Amazon Link Buy anything with this and it helps MVS!

Volvo 855T engine swap using a 2.4T V70R Engine

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

User avatar
henrysin44
Posts: 113
Joined: Sun Apr 12, 2015 4:14 pm
Year and Model: 1994 Volvo 855 Turbo
Location: Guilford, CT USA
Has thanked: 1 time
Been thanked: 3 times
Sweden
henrysin44

Volvo 855T engine swap using a 2.4T V70R Engine

Post by henrysin44 » Mon Apr 16, 2018 3:57 pm

Hey all, I have a 00' V70R that'll take too much time and money to sell running so my parents want it towed away, it was their car. Everything under the hood is in very good condition except for the front and rear diff, its shot. The engine ran just fine and has a little over 300K. I hate to have to strip it down but the repair list is a mile long and I couldn't bring myself to let good R parts go to waste.

So I want to swap the engines, put the R engine in my 855T and store the 855T engine as a backup. I have a few ideas on how to go about this and would appreciate some feedback.

Idea 1: This one seems to be the easiest to me. On the R engine id remove the vvt cams and cam cover and replace it with N/A cams and 2.3L cam cover. I'd also remove the intake manifold and replace it with a 2.3L intake manifold as the R intake manifold has ETC (unless the R manifold can be modified). And lastly remove the auto transmission from it and put on my 855T's M56H 5-Speed. I'm sure ive missed some things that need to be swapped on the R engine but, and correct me if im wrong, this would allow me to just drop the R engine & transmission into my 855T without replacing the M4.4 ECU, wiring, ignition, and sensors. My thinking here is that the 2.3T and 2.4R engines are basically the same just with the 2.4R being abit more opened up on the inside.

Idea 2: This one isn't my favorite option as id have to re-wire the entire car basically. Anyway just take the auto-transmission off the R engine and replace it with my M56H 5-Speed. I'd also pull all the wiring, sensors, etc.. (ouch!).

However I havn't been able to find much on the 00' V70R spec wise, so i'm not 100% sure if a M56H/L transmission is a direct fit to the R engine but i could't see why it wouldn't. My first idea is the one i'm hoping can be done as id like to stick with the M4.3/4.4 management system, continue to use distributor ignition (I hate coilpacks), not have ETC, and not have to mess with wiring as much as possible.

Any feedback and or ideas is greatly appreciated!
http://shealabs.net
Daily driver Black 1994 Volvo 855 2.3L Turbo - manual swapped, turbo swapped, green injectors, custom M4.4 Tune, de-catted, custom two-tone interior, V70R seats & rims
Teal 1994 Volvo 855 2.5L N/A Manual Transmission (the back up daily and parts car) - Runs and Drives but the engine knocks
Silver 1997 Honda CRV 2.0 AWD - its in a very sorry condition, but drives
Silver 2003 Subaru Forester 2.5L N/A AWD - Leaks everything

User avatar
erikv11
Posts: 9788
Joined: Sat Jul 25, 2009 2:03 pm
Year and Model: 850, S/V70, 06 S60R
Location: Iowa
Has thanked: 102 times
Been thanked: 300 times
United States of America
erikv11

Re: Volvo 855T engine swap using a 2.4T V70R Engine

Post by erikv11 » Mon Apr 16, 2018 4:15 pm

This kind of engine swap is done all the time, an RN (99+) engine into an N (98-) car. You have it right just keep the manifolds from your 855, yes you can keep the distributor and mechanical throttle body, etc.

Check out the video here from IPD: http://volvospeed.com/vs_forum/topic/17 ... questions/
'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 145k
'98 S70 NA, 220k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 286k
'06 S60 R, 167k
'99 Camry V6 :shock: 125k
gone: '96 NA 850 210k, '98 NA V70 182k

Ozark Lee
MVS Moderator
Posts: 14798
Joined: Thu Sep 07, 2006 8:24 am
Year and Model: Many Volvos
Location: USA Midwest
Has thanked: 4 times
Been thanked: 53 times
United States of America
Ozark Lee

Re: Volvo 855T engine swap using a 2.4T V70R Engine

Post by Ozark Lee » Mon Apr 16, 2018 9:25 pm

You can't change the cams and the cam cover to remove the CVVT. The seal is a different size on the CVVT cam. What you can do is just leave it as is and the CVVT will lock itself in place since the CVVT solenoid won't be hooked up to anything.

...Lee
'94 850 N/A 5 speed
'96 Platinum Edition Turbo
Previous:
1999 V70XC - Nautic Blue - Totaled while parked.
1999 V70XC - RIP - Wrecked Parts Car.
1998 S70 T5
1996 850 N/A
1989 740 GLT
1986 740 GLT
1972 142 Grand Luxe

User avatar
henrysin44
Posts: 113
Joined: Sun Apr 12, 2015 4:14 pm
Year and Model: 1994 Volvo 855 Turbo
Location: Guilford, CT USA
Has thanked: 1 time
Been thanked: 3 times
Sweden
henrysin44

Re: Volvo 855T engine swap using a 2.4T V70R Engine

Post by henrysin44 » Tue Apr 17, 2018 5:26 pm

erikv11 wrote:
Mon Apr 16, 2018 4:15 pm
This kind of engine swap is done all the time, an RN (99+) engine into an N (98-) car. You have it right just keep the manifolds from your 855, yes you can keep the distributor and mechanical throttle body, etc.

Check out the video here from IPD: http://volvospeed.com/vs_forum/topic/17 ... questions/
Ozark Lee wrote:
Mon Apr 16, 2018 9:25 pm
You can't change the cams and the cam cover to remove the CVVT. The seal is a different size on the CVVT cam. What you can do is just leave it as is and the CVVT will lock itself in place since the CVVT solenoid won't be hooked up to anything.

...Lee
Awesome! Glad to hear im on the right path. I watched the video and it seems actually quite straight forward, looks like its going to be easier than i thought, not that a swap is easy. I do plan I leaving the RN exhaust manifold on the RN motor (Has a 19T on it!) so my problem there i imagine will be the position of the RN down-pipe.

Ah had a feeling the cams couldn't be swapped, only brought it up because i was afraid the CVVTs could cause bad timing with M4.4/4.3 but i didn't know they lock to 0 without signal.


One thing I still haven't been able to confirm is if the M56H or L will bolt up to the RN motor without issue.
http://shealabs.net
Daily driver Black 1994 Volvo 855 2.3L Turbo - manual swapped, turbo swapped, green injectors, custom M4.4 Tune, de-catted, custom two-tone interior, V70R seats & rims
Teal 1994 Volvo 855 2.5L N/A Manual Transmission (the back up daily and parts car) - Runs and Drives but the engine knocks
Silver 1997 Honda CRV 2.0 AWD - its in a very sorry condition, but drives
Silver 2003 Subaru Forester 2.5L N/A AWD - Leaks everything

Ozark Lee
MVS Moderator
Posts: 14798
Joined: Thu Sep 07, 2006 8:24 am
Year and Model: Many Volvos
Location: USA Midwest
Has thanked: 4 times
Been thanked: 53 times
United States of America
Ozark Lee

Re: Volvo 855T engine swap using a 2.4T V70R Engine

Post by Ozark Lee » Tue Apr 17, 2018 10:45 pm

I cannot make a 100% guarantee that the M56 variants will bolt up since I have never done the procedure myself but they should go together just fine. Obviously the flex plate needs to be removed and replaced with a manual transmission flywheel. People swap RN engines into older cars all the time and the manual bell housing bolts to the block just like an automatic.

In a perfect world you would scare up a manual transmission turbo ECU. Without it you will have a constant CEL since the automatic ECU will not be able to communicate with the TCU (it gets removed). I think that Lucky has the manual software and he can re-flash your ECU to be a manual transmission version. The shifting is a lot easier with the manual ECU since it alters the throttle response (engine wind down slope) when you let off the accelerator. If you give him all of the specs of the build he can do a very nice tune.

...Lee
'94 850 N/A 5 speed
'96 Platinum Edition Turbo
Previous:
1999 V70XC - Nautic Blue - Totaled while parked.
1999 V70XC - RIP - Wrecked Parts Car.
1998 S70 T5
1996 850 N/A
1989 740 GLT
1986 740 GLT
1972 142 Grand Luxe

sventastic
Posts: 77
Joined: Sun May 10, 2015 6:50 pm
Year and Model: 1996 854R
Location: Canada
Has thanked: 3 times
Been thanked: 4 times
Canada
sventastic

Re: Volvo 855T engine swap using a 2.4T V70R Engine

Post by sventastic » Tue Apr 17, 2018 10:55 pm

It would be easy enough to get a manual tune through Aaron at http://vasttuning.com - he's the go-to for M4.4 tuning
1996 854R | M56H | 16T | 268k | BC, Canada

User avatar
erikv11
Posts: 9788
Joined: Sat Jul 25, 2009 2:03 pm
Year and Model: 850, S/V70, 06 S60R
Location: Iowa
Has thanked: 102 times
Been thanked: 300 times
United States of America
erikv11

Re: Volvo 855T engine swap using a 2.4T V70R Engine

Post by erikv11 » Wed Apr 18, 2018 12:56 pm

+1 for vasttuning.com

You'll get exactly what you want, it will work, and you'll get great customer service.
These users thanked the author erikv11 for the post:
VTs70T5M
'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 145k
'98 S70 NA, 220k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 286k
'06 S60 R, 167k
'99 Camry V6 :shock: 125k
gone: '96 NA 850 210k, '98 NA V70 182k

User avatar
henrysin44
Posts: 113
Joined: Sun Apr 12, 2015 4:14 pm
Year and Model: 1994 Volvo 855 Turbo
Location: Guilford, CT USA
Has thanked: 1 time
Been thanked: 3 times
Sweden
henrysin44

Re: Volvo 855T engine swap using a 2.4T V70R Engine

Post by henrysin44 » Fri Jun 22, 2018 10:14 pm

So I finally have free time and am considering doing this swap a few weeks from now as it seems quite easy for me in the realm of engine swaps. My plan is to drop the subframe of my V70R and just bolt it up to my 850 (after swapping the transmission and necessary parts over from the N to RN). Although i'm still hesitant to do it for some new reasons. I had forgotten I removed the spark-plugs from the V70R to put on my moms XC70 so its been sitting for a year without anything covering the sparkplug holes (hood always down though) so i'm abit worried about internal rust and if it would have a negative effect or not. Another thing is it had about 300K miles on it and always idled rough in the short time we used it but it had original coil-packs and swapping some with scrapyard ones seemed to help.

So is there anyway to test the engines health without running it as the car is stripped to the point that i cant crank it. Or would it be worth it to just rebuild the engine as a long term project rather than risk putting a ticking time bomb in my car.

EDIT: I've been looking online for piston rigs, connecting rod bearings, valve steam seals, etc. for my V70R's b5244t2 engine and it appears no one sells parts for this motor, so another question to add is are there compatible parts from other 2.4L engines?

EDIT(sorry): I went out to take a look at the engine and found that I left the spark-plugs in (thank god), and after cleaning the punch plate I got the engine model (b5244T), thing is I remember reading this was a 1 year production engine and finding internal parts is next to impossible, is that correct? I wouldn't want to daily an engine that has internals that can't be bought, or are dealer only.
Last edited by henrysin44 on Sat Jun 23, 2018 6:12 am, edited 6 times in total.
http://shealabs.net
Daily driver Black 1994 Volvo 855 2.3L Turbo - manual swapped, turbo swapped, green injectors, custom M4.4 Tune, de-catted, custom two-tone interior, V70R seats & rims
Teal 1994 Volvo 855 2.5L N/A Manual Transmission (the back up daily and parts car) - Runs and Drives but the engine knocks
Silver 1997 Honda CRV 2.0 AWD - its in a very sorry condition, but drives
Silver 2003 Subaru Forester 2.5L N/A AWD - Leaks everything

User avatar
henrysin44
Posts: 113
Joined: Sun Apr 12, 2015 4:14 pm
Year and Model: 1994 Volvo 855 Turbo
Location: Guilford, CT USA
Has thanked: 1 time
Been thanked: 3 times
Sweden
henrysin44

Re: Volvo 855T engine swap using a 2.4T V70R Engine

Post by henrysin44 » Fri Jun 22, 2018 10:23 pm

Ozark Lee wrote:
Tue Apr 17, 2018 10:45 pm
I cannot make a 100% guarantee that the M56 variants will bolt up since I have never done the procedure myself but they should go together just fine. Obviously the flex plate needs to be removed and replaced with a manual transmission flywheel. People swap RN engines into older cars all the time and the manual bell housing bolts to the block just like an automatic.

In a perfect world you would scare up a manual transmission turbo ECU. Without it you will have a constant CEL since the automatic ECU will not be able to communicate with the TCU (it gets removed). I think that Lucky has the manual software and he can re-flash your ECU to be a manual transmission version. The shifting is a lot easier with the manual ECU since it alters the throttle response (engine wind down slope) when you let off the accelerator. If you give him all of the specs of the build he can do a very nice tune.

...Lee
I learned to drive stick on my swapped 850 with no tune and didn't know just how awful it was until I flashed a M56 Turbo file to my ECU, its so smooth to drive now although i'm still getting used to the ECU holding the rev during shifts. But yes it would be nice to get in contact with someone who really knows what they're doing with tuning when I get around to having a 19T turbo under the hood, I was able to edit the M56 .BIN injector constant for the Bosch greens I put in but beyond that i'm clueless.
http://shealabs.net
Daily driver Black 1994 Volvo 855 2.3L Turbo - manual swapped, turbo swapped, green injectors, custom M4.4 Tune, de-catted, custom two-tone interior, V70R seats & rims
Teal 1994 Volvo 855 2.5L N/A Manual Transmission (the back up daily and parts car) - Runs and Drives but the engine knocks
Silver 1997 Honda CRV 2.0 AWD - its in a very sorry condition, but drives
Silver 2003 Subaru Forester 2.5L N/A AWD - Leaks everything

User avatar
erikv11
Posts: 9788
Joined: Sat Jul 25, 2009 2:03 pm
Year and Model: 850, S/V70, 06 S60R
Location: Iowa
Has thanked: 102 times
Been thanked: 300 times
United States of America
erikv11

Re: Volvo 855T engine swap using a 2.4T V70R Engine

Post by erikv11 » Sat Jun 23, 2018 9:11 am

About the engine internals: Volvospeed is eerily quiet these days but the long-time posters over there will know exact and correct answers about this stuff, if you can pry it out of them and put up with the guff. You don't want book knowledge here (someone looking up engine numbers on the internet), you want to communicate with people who have done and seen dozens of swaps and rebuilds.
'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 145k
'98 S70 NA, 220k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 286k
'06 S60 R, 167k
'99 Camry V6 :shock: 125k
gone: '96 NA 850 210k, '98 NA V70 182k

Post Reply
  • Similar Topics
    Replies
    Views
    Last post