z6 mild rebuilding

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B

bistec

Project EH23
I want to rebuild my old z6 and have some question about the process. The engine has 154000 miles. Honestly i'm not looking for big power but a fresh and reliable engine .

1- Is it absolutely necessary to bore and hone the cylinders?
2- Can i use this ebay rebuilt kit ? http://cgi.ebay.com/ebaymotors/Mast...ItemQQcategoryZ33620QQitemZ160075076891QQrdZ1 ?
3- What is absolutely necessary to do or change?

Thanks.
 
bistec said:
I want to rebuild my old z6 and have some question about the process. The engine has 154000 miles. Honestly i'm not looking for big power but a fresh and reliable engine .

1- Is it absolutely necessary to bore and hone the cylinders?
2- Can i use this ebay rebuilt kit ? eBay Motors: Master Rebuild Kit - Honda 1.6L (D16Z6 VTEC) 92-95 (item 160075076891 end time Apr-17-07 00:23:34 PDT) ?
3- What is absolutely necessary to do or change?

Thanks.
Click to expand...

It is usually necessary to bore and hone your cylinders so they will clean up all of the way so the new rings will seat. I dont recommend one of those rebuild kits, the parts are no where near the quality of OEM Honda parts. You can order factory pistons from Honda .10 over, that is what you will want to do. Also pick up the ring set from them for those pistons. Next have a valve job done on the head, before you drop it off at the machine shop pick up some oem valve seals from Honda and give it to them so they have them. Give the pistons to the machine shop, they usually like to have them so they can measure them before they do the machine work to the block. Your rods should be fine. On the block it is stamped out what bearings you will need to order. Consult a hayne's manual for your civic to learn how to do this. Then order the bearings from Honda. Other then that I recommend new oil and water pumps, belts, all new seals and gaskets. I recommend only Honda's stuff. Settling for cheap aftermarket parts will bite you in the ass big time later on. If you are assembling the engine your self it will save alot of money. I would say you will have maybe$1100-$1200 bucks total wrapped up in machine work and parts. But it is worth it. If you follow all of this advice your engine will be as fresh as a new one. I dont like to cut corners and I suggest you dont.
 
boostin4fun said:
It is usually necessary to bore and hone your cylinders so they will clean up all of the way so the new rings will seat. I dont recommend one of those rebuild kits, the parts are no where near the quality of OEM Honda parts. You can order factory pistons from Honda .10 over, that is what you will want to do. Also pick up the ring set from them for those pistons. Next have a valve job done on the head, before you drop it off at the machine shop pick up some oem valve seals from Honda and give it to them so they have them. Give the pistons to the machine shop, they usually like to have them so they can measure them before they do the machine work to the block. Your rods should be fine. On the block it is stamped out what bearings you will need to order. Consult a hayne's manual for your civic to learn how to do this. Then order the bearings from Honda. Other then that I recommend new oil and water pumps, belts, all new seals and gaskets. I recommend only Honda's stuff. Settling for cheap aftermarket parts will bite you in the ass big time later on. If you are assembling the engine your self it will save alot of money. I would say you will have maybe$1100-$1200 bucks total wrapped up in machine work and parts. But it is worth it. If you follow all of this advice your engine will be as fresh as a new one. I dont like to cut corners and I suggest you dont.
Click to expand...

Thanks that's really helpful!:)
 
Or you could just replace the bearings and piston rings for really cheap and have a pretty much "0"mile motor.

Cheap!!!
 
Blanco said:
Buy OEM Honda parts except pistons, get Nippon Racing Pistons from guit-guit on eBay. They're around $170 shipped and include a good set of rings. An over-bore will mostly depend on the condition of your cylinders. Most people choose a .020" over-bore to ensure that they have a perfectly round cylinder and the new hone seats the rings quicker and more fully. Depending on how you have to spend, it'll cost about $200 for a .020" over-bore and hone, you should do this. A valve job's a good idea and will add a fair amount of power but it's not mandatory unless you have valve seal problems. Given the option, I'd go for the over-bore because that will unshroud the valves a little and allow them to breath easier. If you can swing both, do both. With bearings you can either go with stock or you can choose a clearance, .0015" is the most commonly used because it's a good balance between reliability and high rev'ing ability.

Go to the Auto Multi Media forum and read the topic "A Few Pics Of My Build" to see get an idea of what I did.
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Thanks!
 
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