Valves, Cams,& the works

carfanatic89 · 06-04-2007, 05:00 AM

I just pulled the head on my 7mge and the valves have alot of carbon build up and just plain looks like crap. I want to replace them and replace anything that can be replaced with the exception of the cam(not enough money). Theres one problem I dont know how to do any thing with the valves. Can someone send me a link with a step by step process to pull them out and rebuild everything

cre · 06-04-2007, 07:08 AM

Of course you're not going to have enough money for some things if you just dive in and replace anything that you *think* might need it.

Take the whole head to a machine shop. Have it cleaned, pressure tested, inspected for cracks, cut level (if needed) and have the valve stem seals replaced. If there's a problem with the valves or their clearances they'll tell you.

mrnickleye · 06-04-2007, 03:28 PM

Heads off??
Have machine shop do a full service on it.

Its the RIGHT thing to do.

tone loc · 06-04-2007, 03:43 PM

what does the full service usally include

cre · 06-04-2007, 05:18 PM

It depends on the shop, it typically includes everything I listed except for replacing the valve stem seals and testing the springs... it's a rather vague term.

mrnickleye · 06-05-2007, 02:13 AM

Valve job, spring test, set valve adjustment, mill head slightly to true it up, glassbead cleaning, check for cracks, check for warping, install seals (you should provide from your head gasket set).

carfanatic89 · 06-06-2007, 04:02 AM

I took off the head and the cams are worn pretty bad. I dont know what its called but the place where you put the caps on and bolt the cam down to the head has groves in about 5 or 6 places, what should I do. Ive been told that if you replace the cam then you have to replace the valve seats and grind the valve to make all the clearances perfect. Like take a feeler gauge and make sure it meets the manuals requirements. Is this true. Ive thought about a performance cam would I have to change the injectors too. And mess with the CPU, or will it correct the fuel/air ratio by itself

06-04-2007, 05:00 AM	#1
carfanatic89 3" Exhaust Join Date: Apr 2007 Location: Waco Posts: 164	Valves, Cams,& the works I just pulled the head on my 7mge and the valves have alot of carbon build up and just plain looks like crap. I want to replace them and replace anything that can be replaced with the exception of the cam(not enough money). Theres one problem I dont know how to do any thing with the valves. Can someone send me a link with a step by step process to pull them out and rebuild everything

06-04-2007, 03:28 PM	#3
mrnickleye 1000whp postwhore Join Date: Jun 2005 Location: Mojave Desert, Calif. Posts: 1,705	Heads off?? Have machine shop do a full service on it. Its the RIGHT thing to do. __________________ Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing. TEMS, and some nice MODS. Sold to a friend 10/08/08.

06-05-2007, 02:13 AM	#6
mrnickleye 1000whp postwhore Join Date: Jun 2005 Location: Mojave Desert, Calif. Posts: 1,705	Valve job, spring test, set valve adjustment, mill head slightly to true it up, glassbead cleaning, check for cracks, check for warping, install seals (you should provide from your head gasket set). __________________ Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing. TEMS, and some nice MODS. Sold to a friend 10/08/08.

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06-04-2007, 07:08 AM	#2
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Of course you're not going to have enough money for some things if you just dive in and replace anything that you think might need it. Take the whole head to a machine shop. Have it cleaned, pressure tested, inspected for cracks, cut level (if needed) and have the valve stem seals replaced. If there's a problem with the valves or their clearances they'll tell you.

06-04-2007, 03:43 PM	#4
tone loc 20psi boost Join Date: Jun 2006 Location: Chicago Posts: 706	what does the full service usally include

06-04-2007, 05:18 PM	#5
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	It depends on the shop, it typically includes everything I listed except for replacing the valve stem seals and testing the springs... it's a rather vague term.

06-06-2007, 04:02 AM	#7
carfanatic89 3" Exhaust Join Date: Apr 2007 Location: Waco Posts: 164	I took off the head and the cams are worn pretty bad. I dont know what its called but the place where you put the caps on and bolt the cam down to the head has groves in about 5 or 6 places, what should I do. Ive been told that if you replace the cam then you have to replace the valve seats and grind the valve to make all the clearances perfect. Like take a feeler gauge and make sure it meets the manuals requirements. Is this true. Ive thought about a performance cam would I have to change the injectors too. And mess with the CPU, or will it correct the fuel/air ratio by itself