c_long20 Posted April 14, 2012 Report Share Posted April 14, 2012 I recently discovered that the 4" crack in the rear of my block is where my large coolant leak is. That sucks but 180K miles will do that I guess. I have an engine from an 02 XC70 with ~60K miles that I will be stealing the block, bottom end, and oil pan from. I am going to use the original head from my car on this block. My head is already ported and polished and it will make it easier/cheaper to get everything going. The original engine was the B5254T that came in the 98 V70, the new one came from an 02 XC70 which is also the 2.5 LPT. I don't have any pictures right now but I can post some up if needed, I can also get some more engine info if I have to. My question is, what issues am I going to run into? I know the timing belts are different from the auto to manual tensioners, which belt should I use? Other than the belts, I don't know of any major problems that I may come across. So if anyone has done this or similar, let me learn from your tribulations. I did search this but I wasn't really finding an answer that suited me. Link to comment Share on other sites More sharing options...
wizzard_al Posted April 14, 2012 Report Share Posted April 14, 2012 You may have to check the length of each belt with the head on the car, to see if there is a problem. Probably will use the later style belt, used with the mechanical tensioner. Use the head gasket from the head that you are putting on the block is the normal advice, but you'd better check carefully, because that head gasket may not have big enough holes and might stick into the combustion chamber. Measure twice, and you may end up buying the head gasket for the 2.4 engine. from the same time period as your original engine. Would be well worth using the oil pan and oil cooler from the later engine, then you can just cap off the cooler lines to the radiator. You'd need to water pipe on the back side of the engine. Link to comment Share on other sites More sharing options...
sconeman Posted April 14, 2012 Report Share Posted April 14, 2012 The valves are thinner and lighter in the newer head and chances are the ME7 head is already larger than your ported M4.4 head. What about selling your ported head and just keeping the other Xc70 engine intact. That would be easier and might save you some money? Just food for thought. Problem is you may not want to run a K24 on a LPT 2.5.... IIRC Lucky has stopped tuning for turbos that size on a LPT because a couple of people have blown their engines on that type of setup. If you're building the bottom end then no problem. Link to comment Share on other sites More sharing options...
Keaton85 Posted April 14, 2012 Report Share Posted April 14, 2012 If you did swap the 98 head onto the 02 then you would use the same belt and rollers as the 02. Same parts as the 98 with mechanical tensioner. Link to comment Share on other sites More sharing options...
lookforjoe Posted April 15, 2012 Report Share Posted April 15, 2012 Make sure you get all the motor mount brackets with the newer engine, you will need them. And the oil cooler hoses, and the water dist pipe as suggested. As Sconeman has suggested, you would do better to leave the motor complete & use as is. The later head is significantly better flowing. Unless you spent $$$$ on really porting the old head, there is no reason to consider using it. You will need to port your old manifold to the newer head, and possibly have additional material welded to the flange to prevent weakening, the ports are MUCH larger. If the '02 has the intermediate length rods & the shorter pistons, then it's probably a true 2.5L, unlike the '98 which is actually just over 2.4L. Link to comment Share on other sites More sharing options...
c_long20 Posted April 15, 2012 Author Report Share Posted April 15, 2012 If I use the newer style head, do I have to get VVT eliminator pulleys or can I just set them like I normally would? The dual VVT, intake, and still using the distributor are why I was just keeping my head. I spent 750 getting the head worked over about 6 months ago. I have the intake off the XC, will my cable throttle hook up? I can't afford a divorce at the moment, so the cheaper I can do this the better. ? I do have the oil cooler and lines, the hard coolant line that runs the back of the engine. I only have the mount that is next to the harmonic balancer, the other one is mia. Link to comment Share on other sites More sharing options...
sconeman Posted April 15, 2012 Report Share Posted April 15, 2012 you can leave the exhaust pulley and the solenoid (solenoid will be in the way if you want the fuel lines running under the cover, or you can get/ make a blanking plate easily to block passages and remove solenoid) 98 Intake will bolt up fine but I would port it to match the ME7 head. you can't use the 02 intake unless you do some fabricating to swap over the throttle body from the 98. The distributor and cam position sensor will bolt up if you drill out the end of the cam a little so older parts will fit. Swapping to the 02 will not be the cheapest way. The cheapest would be to just get a 98 engine and straight swap no B.S. But the 02 is much better. Even if you don't use the ME7 head but use the 02 engine you have to: swap over accessories and modify the 02 cover (with the 98 head I'm not sure which cover you would use....that could be a challenge) Swap CHRA on your turbo to the 02 lines block off the extra coolant port on the flywheel side of the engine. swap front motor mount bracket remove old oil cooler lines I may be forgetting something.. Link to comment Share on other sites More sharing options...
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