Yealla510 Posted October 9, 2015 Report Share Posted October 9, 2015 Thinking of getting stock pistons are do I have a options Quote Link to comment
MicroMachinery Posted October 9, 2015 Report Share Posted October 9, 2015 Z20, Z22, or Z24? Quote Link to comment
datzenmike Posted October 9, 2015 Report Share Posted October 9, 2015 Thinking of getting stock pistons are do I have a options Not very much to go on so the answer is yes. Cooked... what does this mean? Low compression? could be many things. Tight valve, burnt valve, blown head gasket. Is the engine apart? and you can see the piston in your hand? Is it broken or just a hunch?..... No...... it's together I'm guessing. Yes.... is the cylinder scored and in need of a re-bore?..... No..... you may be able to hone it and replace with stock piston and rings if the bore is also perfectly round, non tapered and does not have a lot of wear near the top of the ring travel. Yes... badly scored and/or badly worn. Needs to be bored out to next over size and a new oversize piston and ring set installed. 1 Quote Link to comment
Stoffregen Motorsports Posted October 9, 2015 Report Share Posted October 9, 2015 If you "cooked" a piston, chances are the bore needs some work too. Overheating can cause the aluminum of the piston to grow and transfer to the cylinder wall. The rings can also scratch the bore. Honing a bore to clean up a mess like this is possible, but not with a ball hone. Usually a power hone is the only way to clean up a badly scorched bore and if it's really bad, it may need to be bored over size. As for replacing the pistons, if it's a custom engine, you need to know the bore, pin height, deck height, whether the pin is press fit or held in with a clip, ring pack and dish before you can determine what your options are. If you know what the piston originally came out of that makes it a lot easier. Have you tried a Nissan dealer or local machine shop? 1 Quote Link to comment
Yealla510 Posted October 9, 2015 Author Report Share Posted October 9, 2015 yes is a 1982 nap z Z 2.2 . originally I was going to replace rings seals and bearings and disside I remove the the head last nite and seen the piston cooked and is not good for my budget I might have to take my chances Im removing the piston today and see if the bore wall are not fuck up . if it is I need to find a another block but if I was going st Quote Link to comment
Rick-rat Posted October 9, 2015 Report Share Posted October 9, 2015 could you post a pic of a "cooked" piston ? 2 Quote Link to comment
KoHeartsGPA Posted October 9, 2015 Report Share Posted October 9, 2015 Ya pics are needed here, also if this was a heat issue, you will need to get that head checked out, its worthwhile since itself may be warped and you have it out anyway. 1 Quote Link to comment
Yealla510 Posted October 10, 2015 Author Report Share Posted October 10, 2015 cant im old school image it Quote Link to comment
datzenmike Posted October 10, 2015 Report Share Posted October 10, 2015 Never too old.... http://community.ratsun.net/topic/54932-photobucket-ratsun/ http://community.ratsun.net/topic/691-how-to-post-pictures-and-keep-online-photo-albums/ A picture allows things to be seen that you may have missed. If the piston is in the bore and it's 'cooked' there must be something obvious and damage on the top. Is there a hole in it? (detonation) A chunk missing on the side above the top ring? (over heating) Pits and marks in the aluminum? (foreign object) 1 Quote Link to comment
KoHeartsGPA Posted October 10, 2015 Report Share Posted October 10, 2015 Its also important to figure out why it happened, if you don't determine the cause of the problem then you risk the new components being damaged by a reoccurring unchecked problem. 1 Quote Link to comment
Stoffregen Motorsports Posted October 10, 2015 Report Share Posted October 10, 2015 cant im old school image it This is what frustrates me about forums. I can't tell if this answer means - I don't want to - or - I don't have time - or - I really don't know how I don't think this guy wants the help he asked for. Sorry, but that's how this comes off. If he wants the help, then earn it. Sorry, haven't had my second cup of coffee yet. 3 Quote Link to comment
EastBay521 Posted October 10, 2015 Report Share Posted October 10, 2015 yea post a picture!!!! pussy 1 Quote Link to comment
Yealla510 Posted October 22, 2015 Author Report Share Posted October 22, 2015 Me and andres131313 spent the day putting my engine together today 1 Quote Link to comment
Draker Posted October 22, 2015 Report Share Posted October 22, 2015 Sweet! When will you fire it? Quote Link to comment
EastBay521 Posted October 22, 2015 Report Share Posted October 22, 2015 Hopefully Saturday and drive it to swapmeet by Saturday? How far did you guys get? 1 Quote Link to comment
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