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Post by eclark5483 on Jul 25, 2016 15:47:54 GMT -5
I would of had the whole head replaced. With all that heat, that head has to be warped. I dont like the looks of the cam shaft bearing cradles. Almost lookes like the bearing spun or the bearing caps were loose and things moved around some. Cant honestly say I disagree. I had stated this to him as well. That engine is damaged, no question about it, I agree it looks like the bearings have spun as well. Can't imagine what the crank looks like. I predict an entire top and bottom overhaul is in order, or if it were me... a complete engine swap.
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Post by gsx600racer on Jul 25, 2016 16:06:46 GMT -5
I would of had the whole head replaced. With all that heat, that head has to be warped. I dont like the looks of the cam shaft bearing cradles. Almost looks like the bearing spun or the bearing caps were loose and things moved around some. Cant honestly say I disagree. I had stated this to him as well. That engine is damaged, no question about it, I agree it looks like the bearings have spun as well. Can't imagine what the crank looks like. I predict an entire top and bottom overhaul is in order, or if it were me... a complete engine swap. Yeah, its a bummer. Sometimes the price of knowledge can be expensive.(ours was free) Live and learn. I am still trying to wrap my head around running out of gas and having all this trouble.
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Post by floyd2133 on Jul 26, 2016 0:34:28 GMT -5
Even with new piston and cam shaft. It works. But you all are saying it is blown engine
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Post by eclark5483 on Jul 26, 2016 2:13:48 GMT -5
OK dude. Just don't ever say nobody told you so.
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Post by eclark5483 on Jul 26, 2016 4:27:30 GMT -5
See the parts in red in this picture? That is warping on bearings. If these are not smooth, you will create a huge amount of friction and will basically, destroy any NEW cam that is used to replace the OLD cam. You mentioned your mechanic is going to change the piston and the valve... well that's great and all, but I guarantee you 100%, if nothing is done about that warping, you are gonna be right back here again, no more then a week after getting it back, complaining that it died on you again. Now.. if you are LUCKY... and I sincerely doubt it. The damage is just isolated to the top end. But, in all likelyhood, the bearings at the bottom which your crankshaft uses, are ALSO damaged... The CAUSE of this, was more then likely the heat issue you originally had. The top part, if I'm not mistaken, is probably aluminum, the bottom section is cast iron and can probably withstand more heat then the top. But it would be foolish to NOT check and make double sure. Especially since you are using a 100cc BBK. Which, by itself, not factoring in the heat, puts a strain on that crank shaft. Hey, I'm just trying to save you money and frustration in the long run here. You don't have to heed the warnings that I or anybody else give you... it's your money. It's your loss.
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Post by Deleted on Jul 26, 2016 9:37:34 GMT -5
The fellows are correct Floyd. That head is warped and, IF they can get it to seal and get good compression, it will only last a short while then that head gasket will blow out and you will have no compression again. Or, the cam will get destroyed. It is only a question of which will happen first. As was also stated above, your crank, which has already been over strained by your 100cc kit, is most likely not in good shape either. You will know this is true when your engine locks up or the crank breaks in two.
We are not telling you this stuff to be mean, we are just telling you what is going to happen. Your engine needs to be totally rebuilt.
Bill
PS I am not suggesting we start a pool or anything but, I think you will see evidence of what we are all saying within 2 weeks.
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Post by gsx600racer on Jul 26, 2016 12:10:23 GMT -5
The fellows are correct Floyd. That head is warped and, IF they can get it to seal and get good compression, it will only last a short while then that head gasket will blow out and you will have no compression again. Or, the cam will get destroyed. It is only a question of which will happen first. As was also stated above, your crank, which has already been over strained by your 100cc kit, is most likely not in good shape either. You will know this is true when your engine lock up or the crank breaks in two.
We are not telling you this stuff to be mean, we are just telling you what is going to happen. Your engine needs to be totally rebuilt.
Bill
PS I am not suggesting we start a pool or anything but, I think you will see evidence of what we are all saying within 2 weeks. Ahhh, a pool would sound nice right about now, a swimming pool that is.
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Post by Deleted on Jul 26, 2016 20:30:01 GMT -5
Yes, when I got home, I downloaded and enlarged this photo. (Click on photo to enlarge) Just look at that damage. That is not wear my friend, that is damage. I doubt you would see anything like this with a scoot with 20,000 miles on it. It would have wear, but not galling and bits of metal missing. It would have been interesting to see the corresponding part of the cam shaft that mated to this. I'll bet there is some blue in the color along that shaft. (From overheating) One other thing Floyd...you say there were different folks responsible for the errors made here on your scoot but, if I had a shop that did BBK installs, first, I would have warned you against going any larger than 47 mm without beefing up the crankshaft...second...when your scoot came in to my shop without the cooling shrouds...I would have told you I was not going to do any work on it as your motor is fried, and I don't want you to think I am responsible. So, just to clear this up...both "mechanics" are responsible here and have demonstrated that they know little to nothing about engines in general, and scooter motors specifically. I would have my engine repaired at a reputable place, and then present these other guys with the bill, and if they refused to pay, I would take them to small claims court. Bill
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