Sup fellas', I just recently bought my second GSR, and im wanting to put JDM p73 pistons in....so what is a avg/resonable price to pay for the install?


PS other mods on the car include ... itr cams, skunk IM, jdm 4-1, itr exh, act SS and jun flywheel, vafc ....just incase anyone was wondering.

thanks, Chase

 

Just DIY. It cost a few bucks to have a machine shop press out the old pistons and install the P73's.

I paid $150 to have my rods balanced, install arp rod bolts, align hone and pistons pressed in.

 

I would but i dont trust myself, ive only done 2 engine swaps and replaced a head once. thats pretty much as far as my expeirance goes on engines..mechanically.

 

up

 

your going with a basic OEM build, if you have the inclination to swap engines and remove a head, you could do it, get a manual and go step by step..this is the only way to learn...you'll feel alot different when you know you put the engine together..

 

Think of it this way, you are only doing the pistons and rods. Since you are using factory rods and just changing out the P72 pistons to the P73, it will be simple. Just get a service manual for step by step instruction like previously mentioned.

Take the rods and pistons to a michine shop and have them press out the old and press in the new. You might as well change out the rod bearings, so use the manual to get proper bearings, oem recommended but you can use acl's.

Since you know how to wrench a bit, it will be simple. Only thing would be to make sure the new rings are lined up right to prevent any sealing problems. That would be the most technical part.

I would recommend to DIY to gain knowledge, experience, and comfidence. We are all here on HT to help if you got questions during the build.

 

wow u guys are really fkn cool in this forum, thanks for the advice. Would I need to take the engine out or just come up through the oil pan while its still mounted in the chassis? How you guys normally go about that?

 

all this is great advice, but has anyone even asked how many miles are on this engine?

this will be a factor in weather he uses stock bore pistons or if he will have to get over sized.

I myself always recommend starting with a fresh bore and go with over-sized pistons. this will guaranty a great piston ring seal and a long lasting engine.

If you do decide to just take the old pistons out and put in new ones that are stock bore with new rings, then be sure you check for any scaring on the cylinder walls and be sure to have the rings positioned in the correct locations.

The reason behind going with a fresh bore is this. As the pistons moves up and down int he cylinder it has a front to back motion. This motion over time will cause the cylinder to wear just a little....not enough to see with the naked eye, but you can tell with a bore guage. With a fresh bore and hone will will have a cylinder that will be round and will better your chance's for a better seal with the rings.

Any engine with 80,000 miles or less( IMHO ) is usually ok to go with some stock bore pistons with a light hone.

Yes you can do it yourself and leave the engine in the car as long as you are going to use stock bore pistons. If you plan to go over-sized then you will have to take the engine out and take it to the machine shop and have them bore and hone the block to piston spec.

Do not reuse your rod bearings......just buy new ones, no need to go through all the trouble and have a bearing issue.

and like DEMNTD1 said.....We are all here on HT to help if you got questions during the build.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RedZone &raquo;</TD></TR><TR><TD CLASS="quote">all this is great advice, but has anyone even asked how many miles are on this engine?

this will be a factor in weather he uses stock bore pistons or if he will have to get over sized.

I myself always recommend starting with a fresh bore and go with over-sized pistons. this will guaranty a great piston ring seal and a long lasting engine.

If you do decide to just take the old pistons out and put in new ones that are stock bore with new rings, then be sure you check for any scaring on the cylinder walls and be sure to have the rings positioned in the correct locations.

The reason behind going with a fresh bore is this. As the pistons moves up and down int he cylinder it has a front to back motion. This motion over time will cause the cylinder to wear just a little....not enough to see with the naked eye, but you can tell with a bore guage. With a fresh bore and hone will will have a cylinder that will be round and will better your chance's for a better seal with the rings.

Any engine with 80,000 miles or less( IMHO ) is usually ok to go with some stock bore pistons with a light hone.

Yes you can do it yourself and leave the engine in the car as long as you are going to use stock bore pistons. If you plan to go over-sized then you will have to take the engine out and take it to the machine shop and have them bore and hone the block to piston spec.

Do not reuse your rod bearings......just buy new ones, no need to go through all the trouble and have a bearing issue.

and like DEMNTD1 said.....We are all here on HT to help if you got questions during the build.
</TD></TR></TABLE>
good info

also honda doesnt really rec honeing if it doesnt need it..but i would personally go with redzone's info, being that your looking into a performance aspect from the engine and not really a commuter engine...

 

bump for more info...

i too am looking into p73's.... at 105xxx miles....

however, i'd hate to pull the motor to send it to a shop just for an oversized bore.... im up for the DIY but i suppose only if the motor is already out...

any real world prices? my d-series build up is all me tho

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TeamDOHCside &raquo;</TD></TR><TR><TD CLASS="quote">wow u guys are really fkn cool in this forum, thanks for the advice. Would I need to take the engine out or just come up through the oil pan while its still mounted in the chassis? How you guys normally go about that?</TD></TR></TABLE>

Usually I remove the motor, just much easier when it is out of the vehicle and on an engine stand.

If you hone the cylinder walls, you will need to wash out the shaved material so it would be best out of the car.

Additionally, it is a good idea to use a bore gauge and measure the cylinder bore to see if you need oversized or not as mentioned by redzone.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1.6i &raquo;</TD></TR><TR><TD CLASS="quote">
good info

also honda doesnt really rec honeing if it doesnt need it..but i would personally go with redzone's info, being that your looking into a performance aspect from the engine and not really a commuter engine...</TD></TR></TABLE>

yeah i did the non rehone thing, just clean up the cylinder walls...didnt work very good ..now i gotta buy new rings and take it all apart again and get it honed, etc