Engine Break-in

ZauggIt1 · 10-31-2006, 03:01 AM

So me and my brother are going to attempt to start up our freshly rebuilt 7mgte this weekend when we get the new turbo. I was just wondering from a couple of you guys that have messed around with these motors, what are your trips on breaking in the motor. I would appreciate all help. Thanks for all the tips.

jfunez · 10-31-2006, 04:08 AM

I think in the old times they had a break in period of about 500 miles ,under 50 MPH and dont over rev. it......I think...or something like that...correct me if im wrong...which i might be.....I am....I think.......lol...

damdog05 · 10-31-2006, 04:22 AM

its good to keep it low rpm low speed for about 500 miles. after that dont push too hard til 1000 miles. and its a good idea to change your oil at both those check points to get out anything that might have contaminated it in break in.

suprra_girl · 10-31-2006, 05:59 AM

generally the break in i have used and has worked well is......

crank car without efi fuse to get oil up to the top end and turbo etc
start... check for leaks
fix if necessary

assuming you have new rings.... you need to vary the rpm and drive (not boost) between 35-60mph as that will bed in the rings
the reason for the varied rpm is so the rings and bore doesn't get glazed, so don't sit on 2500rpm all the time... it needs to change

rings don't take long to bed in, what takes the time are the bottom end bearings

once you've driven 100 miles or so i would drain the oil and change the filter then keep driving for about 500miles
start introducing boost... a psi here and there... and gradually increase it

once you've hit bout 500 miles drain the oil and change the filter again

and by then any problems should have introduced themselves or NOT and you should be sweet! hehe

Good Luck with the engine, hope all goes well for you

SupraDupra · 06-02-2007, 11:54 PM

So me and my brother are going to attempt to start up our freshly rebuilt 7mge this weekend... what I normaly do for cam break in and fresh rebuilds is run at 2000rpm for 20 minutes then change the oil ,is this good procedure for the supra as well? Other than that I do the same break in steps stated by the others.

10-31-2006, 03:01 AM	#1
ZauggIt1 3" Exhaust Join Date: Aug 2006 Location: Rockford IL Posts: 61	Engine Break-in So me and my brother are going to attempt to start up our freshly rebuilt 7mgte this weekend when we get the new turbo. I was just wondering from a couple of you guys that have messed around with these motors, what are your trips on breaking in the motor. I would appreciate all help. Thanks for all the tips. __________________ Drive it like you stole it!!!

10-31-2006, 04:08 AM	#2
jfunez 12psi boost Join Date: Oct 2005 Location: georgia,usa Posts: 338	I think in the old times they had a break in period of about 500 miles ,under 50 MPH and dont over rev. it......I think...or something like that...correct me if im wrong...which i might be.....I am....I think.......lol... Attached Thumbnails

10-31-2006, 04:22 AM	#3
damdog05 12psi boost Join Date: Apr 2006 Location: Georgia Posts: 250	its good to keep it low rpm low speed for about 500 miles. after that dont push too hard til 1000 miles. and its a good idea to change your oil at both those check points to get out anything that might have contaminated it in break in. __________________ My cars: 85 Trans Am- Ehhh- Gone 83 Rx7- Much Better- Gone 86.5 Supra- Love- Not Gone

10-31-2006, 05:59 AM	#4
suprra_girl 7M POWAH! ;) Join Date: Jun 2004 Location: New Zealand Posts: 2,312	generally the break in i have used and has worked well is...... crank car without efi fuse to get oil up to the top end and turbo etc start... check for leaks fix if necessary assuming you have new rings.... you need to vary the rpm and drive (not boost) between 35-60mph as that will bed in the rings the reason for the varied rpm is so the rings and bore doesn't get glazed, so don't sit on 2500rpm all the time... it needs to change rings don't take long to bed in, what takes the time are the bottom end bearings once you've driven 100 miles or so i would drain the oil and change the filter then keep driving for about 500miles start introducing boost... a psi here and there... and gradually increase it once you've hit bout 500 miles drain the oil and change the filter again and by then any problems should have introduced themselves or NOT and you should be sweet! hehe Good Luck with the engine, hope all goes well for you __________________ Please use the forum to ask your questions as they will get replied to much faster than pming me Pics of my build. "Good girls are just bad girls that don't get caught" Do a diagnostic first!

06-02-2007, 11:54 PM	#5
SupraDupra 3" Exhaust Join Date: Oct 2006 Location: Cleveland OH Posts: 129	So me and my brother are going to attempt to start up our freshly rebuilt 7mge this weekend... what I normaly do for cam break in and fresh rebuilds is run at 2000rpm for 20 minutes then change the oil ,is this good procedure for the supra as well? Other than that I do the same break in steps stated by the others. __________________ 1988 Supra - N/A 5 speed 1974 'Cuda - 318 2001 Cherokee

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