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?

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

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: 699 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.