Rebuilding engine
#1
Honda-Tech Member
Thread Starter
Rebuilding engine
Im rebuilding my civics GSR engine and plan on replacing all the gaskets, seals and bolts. I believe i spun a bearing so im also planning on doing the rod bearings as well. Im getting the head and block machined as well. Right now i have a 84.5mm head gasket (cylinders are bored) from golden eagle, arp head studs, and ferrea valves. as for the valves im hearing to go over sized for future boost set ups. im pulling the engine apart and sending it out to be machined as well as have the valves put in. is there anything else i should replace or look at while its out? and what should i look for exactly if i spun a bearing in regards to the block and crank
#2
Honda-Tech Member
Re: Rebuilding engine
Is this a sleeved block ??? There is no reason to use larger diameter valves unless you are intending to make really big power. Remember that increasing the valve diameter will increase the chances of valve-to-valve and valve-to-piston contact and it reduces the space between the edge of the valve and the cylinder wall/combustion chamber... called shrouding. "De-shrouding" is the process required to fix this self-inflicted issue when you increase valve diameter.
#3
Honda-Tech Member
Thread Starter
Re: Rebuilding engine
Is this a sleeved block ??? There is no reason to use larger diameter valves unless you are intending to make really big power. Remember that increasing the valve diameter will increase the chances of valve-to-valve and valve-to-piston contact and it reduces the space between the edge of the valve and the cylinder wall/combustion chamber... called shrouding. "De-shrouding" is the process required to fix this self-inflicted issue when you increase valve diameter.
#4
Honda-Tech Member
iTrader: (1)
Re: Rebuilding engine
I too would skip the over sized valves and just have a reputable cylinder head shop go through the head to check everything and only fix what needs fixing. Send the block and crank to the machine shop and they will let you know if you did any damage, and if they can/ how much it will cost to fix it.
You may want to consider replacing the oil pump, depending on how old it is, and if you did spin a bearing.
You may want to consider replacing the oil pump, depending on how old it is, and if you did spin a bearing.
#5
Honda-Tech Member
Thread Starter
Re: Rebuilding engine
I too would skip the over sized valves and just have a reputable cylinder head shop go through the head to check everything and only fix what needs fixing. Send the block and crank to the machine shop and they will let you know if you did any damage, and if they can/ how much it will cost to fix it.
You may want to consider replacing the oil pump, depending on how old it is, and if you did spin a bearing.
You may want to consider replacing the oil pump, depending on how old it is, and if you did spin a bearing.
Cometic 84.5 head gasket: $89
https://www.euroexportinc.com/84-5mm...ura-b18c-b16a/
Rod bearings: $80 +/-
GSR transmission bell housing: $199.00
https://www.ebay.com/itm/Acura-Integ...-/122997247092
Supertech Turbo valves: $255
https://www.ebay.com/i/321402169420?chn=ps
Machine shop for head and block + balance: $1000 +/-
Blox clutch master cylinder: $165
https://www.ebay.com/p/Blox-Racing-C...6899612&thm=10
clutch masters clutch kit: $436.50
https://express.google.com/u/0/produ...gaAlkUEALw_wcB
Light weight flywheel: $245.70
https://www.kseriesparts.com/ACR-AC1...saAgYAEALw_wcB
CTR crank pulley: $94.95
https://www.ebay.com/itm/JDM-HONDA-E...5.c10#viTabs_0
#6
Honda-Tech Member
iTrader: (1)
Re: Rebuilding engine
For the oil pump, I would only do OEM - do not roll the dice with anything else. I think some places sell OEM pumps that have been ported and shimmed, but you'd probably be fine with a regular OEM pump.
If tearing the engine down, don't forget to budget for the small things - seals, gaskets, o-rings, coolant hoses, filters, fluids, etc. - this stuff can add up if you aren't expecting it. Be prepared to do a thread repair or two. If you're going to turbocharge in the future, go ahead and have a bung welded into your oil pan while it is off, and you can just run a -10AN cap on the bung until you decide to turbocharge.
If you're opening the transmission, go ahead and plan to replace the seals if they need it. At a minimum I would visually inspect everything, paying close attention to the teeth on the synchro rings and the corresponding teeth on the gears. Also check the synchro ring to gear clearance. Replace bearings / synchros / sleeves / hubs as required. Clean off the magnet.
If tearing the engine down, don't forget to budget for the small things - seals, gaskets, o-rings, coolant hoses, filters, fluids, etc. - this stuff can add up if you aren't expecting it. Be prepared to do a thread repair or two. If you're going to turbocharge in the future, go ahead and have a bung welded into your oil pan while it is off, and you can just run a -10AN cap on the bung until you decide to turbocharge.
If you're opening the transmission, go ahead and plan to replace the seals if they need it. At a minimum I would visually inspect everything, paying close attention to the teeth on the synchro rings and the corresponding teeth on the gears. Also check the synchro ring to gear clearance. Replace bearings / synchros / sleeves / hubs as required. Clean off the magnet.
#7
Honda-Tech Member
Thread Starter
Re: Rebuilding engine
For the oil pump, I would only do OEM - do not roll the dice with anything else. I think some places sell OEM pumps that have been ported and shimmed, but you'd probably be fine with a regular OEM pump.
If tearing the engine down, don't forget to budget for the small things - seals, gaskets, o-rings, coolant hoses, filters, fluids, etc. - this stuff can add up if you aren't expecting it. Be prepared to do a thread repair or two. If you're going to turbocharge in the future, go ahead and have a bung welded into your oil pan while it is off, and you can just run a -10AN cap on the bung until you decide to turbocharge.
If you're opening the transmission, go ahead and plan to replace the seals if they need it. At a minimum I would visually inspect everything, paying close attention to the teeth on the synchro rings and the corresponding teeth on the gears. Also check the synchro ring to gear clearance. Replace bearings / synchros / sleeves / hubs as required. Clean off the magnet.
If tearing the engine down, don't forget to budget for the small things - seals, gaskets, o-rings, coolant hoses, filters, fluids, etc. - this stuff can add up if you aren't expecting it. Be prepared to do a thread repair or two. If you're going to turbocharge in the future, go ahead and have a bung welded into your oil pan while it is off, and you can just run a -10AN cap on the bung until you decide to turbocharge.
If you're opening the transmission, go ahead and plan to replace the seals if they need it. At a minimum I would visually inspect everything, paying close attention to the teeth on the synchro rings and the corresponding teeth on the gears. Also check the synchro ring to gear clearance. Replace bearings / synchros / sleeves / hubs as required. Clean off the magnet.
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