Can anybody recommend specific tools for honing the cylinders in ea71 and ea81 engines? I see tools on ebay run from $10 to $150. What do I need to do this, I've got a ea81 block to rebuild with minor corrosion in one cylinder.

Edited September 7, 201411 yr by the sucker king

Can anybody recommend specific tools for honing the cylinders in ea71 and ea81 engines? I see tools on ebay run from $10 to $150. What do I need to do this, I've got a ea81 block to rebuild with minor corrosion in one cylinder.

Sorry, wrong place...

Edited September 7, 201411 yr by Crazyeights

Cylinder hone, a Ridge reamer to remove the ridge that may be at the top of the cylinder, and a piston ring compressor. Though I'd recomend that you have the cylinders checked to see if they are out of round.

 

Ed

Very seldom will you need a ridge reamer and I use a brush hone rather than a standard hone, it gives a better finish in the cylinders. You will need a ring compressor though.

i used a strapwrench for piston rings. On ea series engines ive yet to need a hone or reamer of any kind. maybe a scotchbrite wipe down but when the crosshatching looks new after a quarter million miles....I wouldnt worry

the wire wheel type tools for this are the ones I am looking at. ea81 cylinders are about 3.5" in diameter. Do you buy a 3.5" tool? I would think you would want it a little oversized? Also I see them in 240 and 320 grit. So what tool to get? here is a link to the style of tool I am looking at:

 

http://www.ebay.com/itm/FLEX-HONE-TOOL-GB31224-Flexible-Cylinder-Hone-Bore-Dia-3-1-2in-240-Grit-/221544692867?pt=LH_DefaultDomain_0&hash=item339517bc83

okay I did some more research, 3 3/4" is the correct size, now the only question is what grit, I found these from 120 to 400 grit, I have one cylinder with some corrosion, how course do I need to remove rust and what grit should be used to finish it? Please anyone with personal experience let me know.

Alrighty I ordered up a 120 grit for the rust and a 240 grit for the finish. I found this online, anyone know what our subaru cylinder sleeves and piston rings are made of?

 

Edited September 26, 201411 yr by the sucker king

Are you planning on honing the cylinders and reusing your old rings?

 

Josh

NPR recommends 220-280 grit and 45 degree crosshatching, so the 240 grit should do it. You did get silicon carbide correct, GB33424?
 

Are you planning on honing the cylinders and reusing your old rings?

 

Josh

 

No why do you ask?

 

 

NPR recommends 220-280 grit and 45 degree crosshatching, so the 240 grit should do it. You did get silicon carbide correct, GB33424?

 

 

Yes that is correct, thanks!