LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

high rpm preventative maintenance

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Old Feb 28, 2007 | 02:48 PM
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lt4 fd's Avatar
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From: plano texas
high rpm preventative maintenance

With the stock bottom end the gm white spring seems to be unanimously accepted as good insurance as well as arp rod bolts. Most people seem to be claiming of spinning bearings or ruining bearings from possible dirt and poor install but could some of this be further prevented with a better damper or would that be overkill? I was assuming the power the engine makes accounts for some of the vibration along the crank as it spins that the damper must handle, as well as the extra rpms . I personally am lookin at a wilder cam setup and want to have all the easy bases covered and prolong my fun.
Old Feb 28, 2007 | 02:55 PM
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Read what rskrause says here
So yes the oil pump with white spring is a good idea, and make sure your clearances are right. As far as the balancer I would have a good machine shop balance your crank and go with what they say as far as your harmonic balancer
Old Feb 28, 2007 | 02:58 PM
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Thanks for the info. I am talking about the stock bottom end besides rod bolts btw.
Old Feb 28, 2007 | 03:03 PM
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Originally Posted by lt4 fd
Thanks for the info. I am talking about the stock bottom end besides rod bolts btw.
A lot of the big engine builders on this forum like the stock rod bolts too... just thought I'd note. If everything is in good shape you might be able to get away with just polishing and rebalancing the crank putting in a good set of bearings and putting in the white spring on a new oil pump and be able to turn higher than stock rpms
Old Feb 28, 2007 | 03:12 PM
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My reason for this preventative maintenance question was what I could do without dissasembling the engine or atleast to the point of having to machine or rebalance anything. Pulling something off and inspecting it or checking a clearance and putting it back is no problem. Rather than have work done on the stock bottom end it would be better to just upgrade at that point I would think and I am not looking to do that.
Old Feb 28, 2007 | 03:21 PM
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You cant very easily check bearing clearances with the block inside the vehicle
Old Feb 28, 2007 | 03:34 PM
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The plan is to drop the subframe at a toyota dealer when the time comes, I have a friend who works there. The motor is pretty freed up at that point to be put on a stand or whatever, however the time we will have to do this will be limited to a full day. Even if its not done at the end of the day as long as it can be rolled out the door and finished up its all good.
Old Feb 28, 2007 | 03:36 PM
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You're going to take the motor out of the car and put it on an engine stand you mean? If so that MIGHT work but i think most of the engine builders here on the board will recomend against just doing new bearings without polishing the crank.
Old Feb 28, 2007 | 05:30 PM
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After ya get it together keep the valves adjusted,keep good clean oil in it,and every change cut the filter open and look for metal which spells trouble.
7500 is starting to get high 9500 is high.
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