Bottom End Died, have a few questions
07-04-2010, 09:42 AM
#1
Bottom End Died, have a few questions Well on my way home from work last weekend my car started knocking really bad. Got it home and checked the oil level and it was full. Hoping the knocking noise was something other than the bottom end I checked the flywheel, harmonic balancer and any other item that could possibly have come loose and make a knocking noise. No such luck, changed the oil and found plenty of metal shavings (some fairly large and shinny) on the magnet of the drain plug. Have yet to cut the filter open and inspect but I'm 99% sure its a bearing.
Right now I do not have time to do a rebuild from scratch. I found a local guy with a complete stock LT1 that was rebuilt with new bearings, fresh valve springs and other items (he is looking through the receipts for a list of parts), crane rockers and a LT4 Hotcam for a great price. The engine has not been fired up since the rebuild.
My plan is to get this rebuilt engine and swap my ported heads, LT4 Extreme Duty timing set, and 1.6RR (all have about 35K miles on them) onto it and get a custom cam from LE with new springs and some LS7 lifters. This would allow me to get the car back on the road and use my knocking engine for the rebuild I really want in a few years. Sell off the LT4 hot cam and 1.6RR to help pay for the LE cam.
My main question is about the rebuilt stock engine. I have yet to get the parts list for this engine, the guy is digging them up this weekend. I want to be sure to upgrade the bolts on both the mains and rods if they already haven't.
I know the stock crank and rods were used in the rebuild so I'm not sure what aftermarket ARP bolts/studs can be used. I also plan on putting in a new oil pump for cheap insurance. So what are my options for ARP hardware for the stock main and rod bolts?
Right now I do not have time to do a rebuild from scratch. I found a local guy with a complete stock LT1 that was rebuilt with new bearings, fresh valve springs and other items (he is looking through the receipts for a list of parts), crane rockers and a LT4 Hotcam for a great price. The engine has not been fired up since the rebuild.
My plan is to get this rebuilt engine and swap my ported heads, LT4 Extreme Duty timing set, and 1.6RR (all have about 35K miles on them) onto it and get a custom cam from LE with new springs and some LS7 lifters. This would allow me to get the car back on the road and use my knocking engine for the rebuild I really want in a few years. Sell off the LT4 hot cam and 1.6RR to help pay for the LE cam.
My main question is about the rebuilt stock engine. I have yet to get the parts list for this engine, the guy is digging them up this weekend. I want to be sure to upgrade the bolts on both the mains and rods if they already haven't.
I know the stock crank and rods were used in the rebuild so I'm not sure what aftermarket ARP bolts/studs can be used. I also plan on putting in a new oil pump for cheap insurance. So what are my options for ARP hardware for the stock main and rod bolts?
07-04-2010, 12:01 PM
#4
Village Troll 
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Same reason. The new bolts will most likely not position the caps in the same exact location therefore the bearings will not fit correctly. Very crucial when considering a few thousandths of an inch clearance. Stock main cap bolts will work just fine for what you are doing. This is why whenever work is done on the bottom end to put caps and bolts on the same locations they came off.
Last edited by SS RRR; 07-04-2010 at 12:14 PM.
07-04-2010, 02:08 PM
#6
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07-04-2010, 02:28 PM
#7
Another question, would I have to replace the lifters due to the bearing failure? I assumed I would as they are hyd lifters and have oil in them. They also have 35K miles and have been working fine.
