PeachParts Mercedes-Benz Forum - View Single Post - Advice putting Harmonic Balancer back on after it fell off

lutzTD · #6 04-05-2011, 10:40 AM

Quote:

Originally Posted by Brentdh187

Thanks Barry and LutzTD, I will dry fit the parts as soon as I get a new to me HB. I have 2 donor cars same engine. Would it be ok to get the HB off one of them and slap it on? Otherwise scrap yard? I saw online I could get a used one for 58 plus shipping. Anyone know where to get the pins too? LutzTD What drill bits did you use? I read online to not use 2 lipped drill bits because they make a round end and the three lipped one doesn't???? Not sure there either. Then did you just drill all the way through the HB and into the Crank? As far as the water pump issue goes I don't think they drove it too far. The crank bolt, fan, pulleys are all good and must have been parked when it came off to have all the parts picked up. I started it before I bought it and it sounded good I didn't let it run long though. 300 bucks for the newer engine? Thats great. Are you putting the engine in yourself? I have another car I was thinking about swapping engines in but would be having someone else do it. What are the labor costs or hours to do a job like that? Thanks again guys.

I bolted on a homemade drill jig. I drilled .032 undersize and reeemed it to size, you should never make a dowel hole with a drill. Since both parts are soft I went .032 undersize with the drill, usually you can only go .064 undersize or the reemer cant handle the material. I drilled and reemed through the fixture so it was a one time use fixture. There is a thread on here somewhere showing how I did it, if I find it I will attach it later. Also, I did it in the car.

the fixture is easy to make. It can be any thick piece of soft metal thats big enough for the 3 holes. Make the center hole tight on the flywheel bolt, then the two outer holes centered at the diameter of the crank/HB hole sized to .032 under the dowel, attach with the holes approx 90 degrees away from the current ones. make your drill length for the appropriate depth with a marker or tape. drill the crank and HB assembly, then reem them, remove fixture and tap in the dowels, then bolt it all together without removing the HB. Also, I had to buy a longer HB/crank bolt and grind the head down to clear the two dowels holes. Make sure you use a drill press to drill the holes in the fixture, they need to be perpendicular to the part. you cant get this right with a hand drill. once you have the fixture straigth, then you can hand drill the crank and HB.

Yes I am swapping the engine myself, While its out I have changed the oil filter housing gasket, the turbo drain seals, the air cleaner drain orings and the dipstick orings.

heres the old thread

http://www.peachparts.com/shopforum/showthread.php?t=262162&highlight=harmonic

PS. make sure you locktite the pulley bolts