how long does it take to break in?

speedygonzalez · 10-15-2008, 06:24 PM

hi. i'm in a process rebuilding my 4age. my question is, how long or how many miles does it take to break in?

fuzor · 10-16-2008, 12:57 PM

google, engine break in. lots of info!

328FTW · 10-22-2008, 09:05 PM

Depends on a lot of things but if you did rings and bearings I would say the equivilent of a couple longish drives would settle it down although for the engine to truely settle will take a bit longer probably a couple thousand k. It is not much of an issue as long as you give it a good run the first time to settle in the head gasket. It may smoke a little bit as the rings settle in but it goes away.

As long as the bores are honed it's all good. I took some bad advice once from an engine builder saying little jap engines don't need honing and the rings will settle in the glazed bore and I now have to tear the engine down to hone the bores cause after 2000 km it is smoking really bad and the oil is heating up from blowby gases. I think that not honing applies to wet bore engines (really hard bores) not the cast blocks that the 4age uses.

masagsxr · 10-22-2008, 11:02 PM

usually 500miles

Ben · 10-22-2008, 11:12 PM

^ Agree. Also the best break in driving is in-town driving (lots of stop and go). Do as little freeway driving as possible. I was always taught that break miles is 500-1,000

mr29180 · 10-22-2008, 11:30 PM

regular drive will be 1g miles LOL

dposer · 12-24-2008, 04:19 PM

make sure you change your oil after 500 miles as you will have a lot of contaminants in it from the break in also dont use synthetic oil in the break in i have heard not to even use detergent oil but i dont know for sure about that

MR2 Drifter · 12-24-2008, 07:48 PM

Around 500 miles to break in your clutch, there should be a point where the clutch pedal changes (feels different) and your clutch is broken in

And your not suppose to beat on your car, burn out/peel out or shift hard

Timon · 12-24-2008, 11:33 PM

Minimum, ~500-1k, but as everyone says it all depends on how you do the break in. Obviously city vs highway. I'd do a few hundred around the city, and then take it for a trip on the highway. Do it as gentle as possible.

10-15-2008, 06:24 PM	#1 (permalink)
speedygonzalez Toyota Freak Join Date: Jul 2008 Location: Cape Coral, FL Posts: 19 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	how long does it take to break in? hi. i'm in a process rebuilding my 4age. my question is, how long or how many miles does it take to break in?

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10-16-2008, 12:57 PM	#2 (permalink)
fuzor NO SKILLS??(check my car) Join Date: Oct 2008 Location: SOME WHERE Posts: 32 Thanks: 1 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	google, engine break in. lots of info!

10-22-2008, 09:05 PM	#3 (permalink)
328FTW You got another WHAT?!? Join Date: Aug 2008 Location: New Zealand Posts: 401 Thanks: 6 Thanked 26 Times in 24 Posts iTrader Rating: (0/0% )	Depends on a lot of things but if you did rings and bearings I would say the equivilent of a couple longish drives would settle it down although for the engine to truely settle will take a bit longer probably a couple thousand k. It is not much of an issue as long as you give it a good run the first time to settle in the head gasket. It may smoke a little bit as the rings settle in but it goes away. As long as the bores are honed it's all good. I took some bad advice once from an engine builder saying little jap engines don't need honing and the rings will settle in the glazed bore and I now have to tear the engine down to hone the bores cause after 2000 km it is smoking really bad and the oil is heating up from blowby gases. I think that not honing applies to wet bore engines (really hard bores) not the cast blocks that the 4age uses.

10-22-2008, 11:02 PM	#4 (permalink)
masagsxr Cage Fighter Join Date: Sep 2008 Location: Norwalk, CA Posts: 697 Thanks: 0 Thanked 19 Times in 19 Posts iTrader Rating: (0/0% )	usually 500miles

10-22-2008, 11:12 PM	#5 (permalink)
Ben The Fastest MR2 in Reno Join Date: Aug 2006 Location: Oceanside, CA / Reno, NV Posts: 3,404 Thanks: 18 Thanked 240 Times in 227 Posts My Google Map iTrader Rating: (10/100% )	^ Agree. Also the best break in driving is in-town driving (lots of stop and go). Do as little freeway driving as possible. I was always taught that break miles is 500-1,000

10-22-2008, 11:30 PM	#6 (permalink)
mr29180 Cage fighter Join Date: Mar 2008 Location: Frisco (bay area) Posts: 407 Thanks: 0 Thanked 10 Times in 9 Posts iTrader Rating: (0/0% )	regular drive will be 1g miles LOL

12-24-2008, 04:19 PM	#7 (permalink)
dposer No Skills Join Date: Dec 2008 Posts: 5 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	make sure you change your oil after 500 miles as you will have a lot of contaminants in it from the break in also dont use synthetic oil in the break in i have heard not to even use detergent oil but i dont know for sure about that

12-24-2008, 07:48 PM	#8 (permalink)
MR2 Drifter No Drifting Skills Join Date: Jun 2008 Location: Chicago Posts: 676 Thanks: 3 Thanked 4 Times in 4 Posts iTrader Rating: (1/100% )	Around 500 miles to break in your clutch, there should be a point where the clutch pedal changes (feels different) and your clutch is broken in And your not suppose to beat on your car, burn out/peel out or shift hard

12-24-2008, 11:33 PM	#9 (permalink)
Timon MR2 MKI AW11 Join Date: Feb 2008 Location: Utah Posts: 430 Thanks: 4 Thanked 27 Times in 23 Posts My Google Map iTrader Rating: (0/0% )	Minimum, ~500-1k, but as everyone says it all depends on how you do the break in. Obviously city vs highway. I'd do a few hundred around the city, and then take it for a trip on the highway. Do it as gentle as possible.