Guest rfort Posted January 14, 2008 Share Posted January 14, 2008 Has anyone used a Tundra 4.7L Harmonic Balancer on an L28? Is there a difference in harmonic balancer needs between a V-8 and a straight six? Quote Link to comment Share on other sites More sharing options...
JMortensen Posted January 14, 2008 Share Posted January 14, 2008 Is it the right size? Quote Link to comment Share on other sites More sharing options...
Guest rfort Posted January 16, 2008 Share Posted January 16, 2008 Inside diameter and keyway are the same. I'll check the rest of the measurements later this week. Looks VERY close. Quote Link to comment Share on other sites More sharing options...
JMortensen Posted January 16, 2008 Share Posted January 16, 2008 Basically you need the belt pulley to line up and I'm guessing you'll probably have to switch the water pump and alt and whatever else you're running to serpentine. I think that's the only other main issue, assuming it clears the timing cover. If the diameter is wrong you'll have to make a pointer for the timing marks. Quote Link to comment Share on other sites More sharing options...
OlderThanMe Posted January 16, 2008 Share Posted January 16, 2008 hmm...VERY cool. For the record a VH45DE serpentine water pump pully will fit on a Z waterpump bolt pattern and close to the same diameter. Maybe shimming or modification could offset the belt to fit. I can get pics if one of you would want... A VH45DE alternator with pully looks quite similar to a Z alternator as well. VH45 water pump serpentine belt is 15mm wide Pic: VH45 pully on top vs. LD28 pully below (like L28 pully but has extra pully on it) Quote Link to comment Share on other sites More sharing options...
Guest rfort Posted January 17, 2008 Share Posted January 17, 2008 I've measured the Tundra pulley. The outside seal diameter is .035 smaller in dia. I'm thinking .015 on a side and the seal will still seal. May be able to find a damper repair sleeve that would fit and bring it out to the right dia. The outside dia. of the damper is slightly larger, about 1/4 of an inch. The snout is way longer, but can be fixed by machining. If I get the water pump pulley bolted on first, I can determine how much to remove from the snout and make the pump and damper line up, everything else is bracketed and can be fixed. I'm thinking of using a new Tundra A/C compressor also to cut down on weight. I'll let you know the specs if I can get it worked out. Any idea if there is a difference between 6 and 8 cyl. engine dampers. My gut says no, except dia. and inertia ring mass. Quote Link to comment Share on other sites More sharing options...
Mack Posted January 17, 2008 Share Posted January 17, 2008 depends on if the engine is internally or externally balanced. Quote Link to comment Share on other sites More sharing options...
1 fast z Posted January 17, 2008 Share Posted January 17, 2008 I belive engines are all internally balenced now a days. THey have sorta given up the old 400 chevy small block thinking of externally balencing. Quote Link to comment Share on other sites More sharing options...
JMortensen Posted January 17, 2008 Share Posted January 17, 2008 I've measured the Tundra pulley. The outside seal diameter is .035 smaller in dia. I'm thinking .015 on a side and the seal will still seal. May be able to find a damper repair sleeve that would fit and bring it out to the right dia. The outside dia. of the damper is slightly larger, about 1/4 of an inch. The snout is way longer, but can be fixed by machining. If I get the water pump pulley bolted on first, I can determine how much to remove from the snout and make the pump and damper line up, everything else is bracketed and can be fixed. I'm thinking of using a new Tundra A/C compressor also to cut down on weight. I'll let you know the specs if I can get it worked out. Any idea if there is a difference between 6 and 8 cyl. engine dampers. My gut says no, except dia. and inertia ring mass. What is the purpose of using the Toy damper? Seems like a lot of effort, it might leak, and there are BHJ and ATI dampers available for the L that actually fit if you didn't want to use the stock damper. As 1 fast z said, they don't do external damping anymore, so there won't be a difference between a 6 cylinder damper and an 8. Quote Link to comment Share on other sites More sharing options...
ezzzzzzz Posted January 17, 2008 Share Posted January 17, 2008 I'd chose a Toy damper over the ATI or BHJ for price alone. A speedi-sleeve might make up the OD difference or another oil seal with a smaller ID. I need a reasonably priced serpentine drive for my SC project. It should work fine for most applications IMHO. Quote Link to comment Share on other sites More sharing options...
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