break-in period on rebuild?

Snakeman · 01-22-2001, 02:11 AM

just did rings and bearings.
I got cast iron rings.
what kind of break in period before i get back into it?

------------------
Rob Wegner
90LX

70stang · 01-22-2001, 06:28 PM

About 300 miles. But I have had them break in as little as 100 or as much as 500. Whatever you do, do NOT use synthetic oil! One time I used 1 quart of synthetic out the 8 needed and I had to drain it all back out because it wouldn't seat. I had to use the cheapest oil I could find to create enough friction to seat the rings. Use a good non-synthetic, take it on a long steady trip, and watch your mileage. (This requires topping off your tank quite a bit.) Note your mileage every 50 or 100 miles, and you will see it even out.

Thad · 01-23-2001, 11:13 PM

Are rings a hard thing to do? I've been thinking of doing mine but not sure. I know that i need to though.

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90 LX 5.0 Not timed in 1/4 mile yet. 135mph max speed, so far.

Snakeman · 01-23-2001, 11:26 PM

not technically difficult.

there are only about 12 bolts holding the engine in place...

just all the other stuff in the way, lifting the motor out, etc are physically demanding...

then trying to get the right parts from dingbats...special order parts come in after waiting a week or two and they are the wrong part...

trying to get forged pistons from a local store is almost impossible. I asked for forged, they sell me hypereutectic...

oh well...

------------------
Rob Wegner
90LX

01-22-2001, 02:11 AM	#1
Snakeman Registered Member Join Date: Apr 1999 Location: Grass Valley, CA, USA Posts: 1,389	break-in period on rebuild? just did rings and bearings. I got cast iron rings. what kind of break in period before i get back into it? ------------------ Rob Wegner 90LX

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01-22-2001, 06:28 PM	#2
70stang Registered Member Join Date: Dec 2000 Location: Twelve Mile, IN USA 46988 Posts: 17	About 300 miles. But I have had them break in as little as 100 or as much as 500. Whatever you do, do NOT use synthetic oil! One time I used 1 quart of synthetic out the 8 needed and I had to drain it all back out because it wouldn't seat. I had to use the cheapest oil I could find to create enough friction to seat the rings. Use a good non-synthetic, take it on a long steady trip, and watch your mileage. (This requires topping off your tank quite a bit.) Note your mileage every 50 or 100 miles, and you will see it even out.

01-23-2001, 11:13 PM	#3
Thad Registered Member Join Date: Oct 1999 Location: Stuart, FL US Posts: 192	Are rings a hard thing to do? I've been thinking of doing mine but not sure. I know that i need to though. ------------------ 90 LX 5.0 Not timed in 1/4 mile yet. 135mph max speed, so far.

01-23-2001, 11:26 PM	#4
Snakeman Registered Member Join Date: Apr 1999 Location: Grass Valley, CA, USA Posts: 1,389	not technically difficult. there are only about 12 bolts holding the engine in place... just all the other stuff in the way, lifting the motor out, etc are physically demanding... then trying to get the right parts from dingbats...special order parts come in after waiting a week or two and they are the wrong part... trying to get forged pistons from a local store is almost impossible. I asked for forged, they sell me hypereutectic... oh well... ------------------ Rob Wegner 90LX