engine crossover for 2000 V70 XC

[Rocket99]

For service literature the chassis stuff in the Haynes is fairly accurate even though it is really for an 850 but for anything accurate you really need VIDA which is a computer program. The problem is that it wants to run on an old browser. There are some links in the VIDA/DICE forum to a virtual machine copy of the program that will run on newer platforms if the links are still good. The schematic stuff isn't there on VIDA but there are schematics floating around, a little query on The Google will get you to them. The ones I've found on the web are scanned copies and the sets typically have missing pages and bad pagination but if you download enough of the variants for the '99 and the 2000 you come up with a set that is fairly complete.

As far as the ECU internal stuff goes, I know of no schematic for what is inside of the box and even then it is a processor, some I/O chips, and software and there certainly isn't any source code for it. You can change the mapping but the core code is what it is. Schematically the ECU is just a black box with inputs and outputs.

There are fairly cheap Chinese knockoff DICE interfaces that when used with VIDA will tell you tons of stuff and in many cases that is the only way to query many of the functions on the car such as the throttle module.

If it overheated I would start by yanking the head and having a look to see what you are dealing with.

...Lee

Thank you Lee. Helps a LOT to have a seasoned Volvo guy helping out.

[Rocket99]

For service literature the chassis stuff in the Haynes is fairly accurate even though it is really for an 850 but for anything accurate you really need VIDA which is a computer program. The problem is that it wants to run on an old browser. There are some links in the VIDA/DICE forum to a virtual machine copy of the program that will run on newer platforms if the links are still good. The schematic stuff isn't there on VIDA but there are schematics floating around, a little query on The Google will get you to them. The ones I've found on the web are scanned copies and the sets typically have missing pages and bad pagination but if you download enough of the variants for the '99 and the 2000 you come up with a set that is fairly complete.

As far as the ECU internal stuff goes, I know of no schematic for what is inside of the box and even then it is a processor, some I/O chips, and software and there certainly isn't any source code for it. You can change the mapping but the core code is what it is. Schematically the ECU is just a black box with inputs and outputs.

There are fairly cheap Chinese knockoff DICE interfaces that when used with VIDA will tell you tons of stuff and in many cases that is the only way to query many of the functions on the car such as the throttle module.

If it overheated I would start by yanking the head and having a look to see what you are dealing with.

...Lee

Thank you Lee. Helps a LOT to have a seasoned Volvo guy helping out.

It's just a plastic cover closest to cylinder 1 Abscate was referring to not a valve cover in the traditional sense.

The B5234 motor from T5 variants has lower compression and is therefore better suited to high boost/bigger turbo. It has smaller bore and lower compression pistons.

Any motor from a 2.4T or XC variant 2001-2002 is OK.

Thanks Precopster. Seasoned helpers make a huge difference. I can handle the hands on part, plenty of experience. Information makes the difference between whether its worth the hassle or not. A very very big difference.

[precopster]

No problem. With my 2001 T5 I went the other way: a higher compression B5244T3 because it's what I had on hand.

It's only 0.5 more compression from 8.5:1 vs 9.0:1 so not a biggie and if the rings are worn on the higher compression engine it would put out similar cylinder compression to the low compression engine.

If you go the other way and fit a lower lower compression engine where higher compression is called for you might end up with a slug.

[Rocket99]

You guys have been super cool helping me get up to speed on these Volvo modular engines.

Can you review my understanding so far?

Mine: 2000 V70 AWD, VIN 56, B5244T, exhaust only variable valve timing

The 2.3L, 2.4L, and 2.5L 5 cylinder (I assume) all have the same block, heads (for intake and exhaust manifold boltup), motor mounts and bell housing connections.
So, any turbo model using the same control unit (mine uses Bosch ME7, exhaust only variable timeing) will be suitable, and will drop into 2000 V70, if it uses ME7 controller That will mean i it is exhaust side only variable valve timing.

If donor car is front WD only, no problem, exhaust manifold / turbo from mine, accomodating drive shaft to rear will bolt right up
Intake manifold is same
trans / bell housing mating is same
If donor engine uses ME7 presumably it is also exhaust only CVVT

One hard core Volvo guy said regarding the turbo: since it popped head gasket under heat of coolant loss the turbo was probably stressed out due to loss of coolant so a replacement used one makes sense.

Thanks again to the brotherhood.....

I got sidetracked by truamatic deaths of two younger brothers within 6 weeks brothers, requireing lawyers (puke), real estate agents, my own health challenges. I do want to resurrect this very cool car. $7500 a year for full access to techical info. I'll hold my tongue on that.

Thanks again

[abscate]

So, any turbo model using the same control unit (mine uses Bosch ME7, exhaust only variable timeing) will be suitable, and will drop into 2000 V70, if it uses ME7 controller That will mean i it is exhaust side only variable valve timing.

Im not sure this is true. Needs a good reference to confirm. Cars were made in the transition years of 1999-2001 with both exhaust and intake side VVT, and I thought they all used ME7

One hard core Volvo guy said regarding the turbo: since it popped head gasket under heat of coolant loss the turbo was probably stressed out due to loss of coolant so a replacement used one makes sense.

Hold off on that. There are lots of counter examples of overheated engines that never require turbo rework. Actually, I can't remember anyone blowing a turbo with an engine here.

For some reason people gravitate towards turbos and engine control modules (ECC ECM "Computers") when they want to talk loud and think less.

[Rocket99]

You are a champ Abscate

thanks

[Ozark Lee]

The turbo is easy to check. Just pull the intake snorkel off and expose the impeller. It should turn freely and not have a ton of end play. On a fresh rebuild it will have very, very little end play but I have had some that work perfectly fine with 0.020 to 0.030 of end play, maybe more. That is likely out of service manual limits but unless the impeller starts hitting the housing it really isn't that big of a deal.

On the car that had the destroyed pistons and cylinders the turbo was fine and I think it is actually in my wife's car right now.

...Lee

[Rocket99]

What happened that requires a whole engine swap? The normal failures like a blown head gasket or a broken timing belt can usually be dealt with by just repairing or replacing the head which typically more available than the entire engine.

Definately a blown gasket at least. IF not warped head or worse. It got hot more than once.

I have no lift facility for working on Volvo.

At age 69 I'l lost my enthusiasm for crawling under cars over and over.

I found a B5254T4 locally with 120K miles. Bingo. More horsepower. But will it bolt in and importantly, it has intake and exhaust VVT

Rough on the 50-42 4 speed automatic?

I've been told, for what thats worth, you can remove the intake VVT solenoid and cap off oil channels with a plate from Snabb or elsewhere.

Will it work to simply plug in the Bosch ME7 ECU that is in the 2000 V70 interacting with all systems.

[Rocket99]

The 2001 motor with the Bosch crank and cam sensors is a better match for a 2000 model and is a B5244T3 with one CVVT on exhaust.

Also the 2002 motor goes straight in and has only one CVVT on exhaust once you remove and swap all the Denso engine management gear such as cam and crank sensors.

Volvo changed the 5 cylinder engine for the 2003 MY with intake AND exhaust CVVT.

If the 1999 motor B5254T is all you can find it will also slide in with little modification. There are plenty more 2001 and 2002 cars out there for parts as Volvo sales in 1999 were dwindling.

Have found a local 2006 V70 with B5254T2 and low miles available.

One Volvo enthusiast has stated if you install an engine with both intake and exhaust CVVT you can simply use it and allow the intake side to not operate, the car has no wiring for it so ignore it. , the intake side will automatically operate in a "neutral" ie zero advance or retard position , as though it was exhause CVVT only.