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mrnickleye · 04-07-2007, 02:36 AM

"I" would not (and did not) use a metal HG. If you are not gonna have the machine shop do a super fine finish, and if you are not gonna have the block resurfaced, then you should use a MLS (OEM) gasket. Like Ishino, or Felpro. Internet.

They will easily handle the HPs you will produce. I've only read bad results for the metal HGs without the above mentioned surface preps.

How's the timing belt? Now is the time to do it. Thermostat.
ALL the coolant hoses. Vacuum too. Definately new seals on the injectors. Bosch kits work great, from any parts store ($36).

(I have an '89 N/A in the shop now that the fellow did the HG himself, in a big hurry, but it won't run good due to bad (not replaced) injector seals. A lot of work now to replace them.

Use all the hoses you can (cheaper$$) from the parts house, then you WILL NEED 1-2 from Toyota. (back of head)

New breather hose (Toyota) from head down to block (under alternator).

PCV hoses, and clean tubing. EGR system...clean everything.

Route coolant hoses off of the throttlebody. That hot water is for heating up the TB, and removing it will get cooler air into intake (cooler air = more HPs). I left it to the ISC valve. I got 2 big vacuum caps and plugged the TB pipes.

Fix everything you find wrong or messy now. Tape the wiring an route it nice. Make sure you don't allow any hoses or wiring to rub on anything. Colored Zip-ties are your friend.

04-07-2007, 02:36 AM	#3
mrnickleye 1000whp postwhore Join Date: Jun 2005 Location: Mojave Desert, Calif. Posts: 1,705	"I" would not (and did not) use a metal HG. If you are not gonna have the machine shop do a super fine finish, and if you are not gonna have the block resurfaced, then you should use a MLS (OEM) gasket. Like Ishino, or Felpro. Internet. They will easily handle the HPs you will produce. I've only read bad results for the metal HGs without the above mentioned surface preps. How's the timing belt? Now is the time to do it. Thermostat. ALL the coolant hoses. Vacuum too. Definately new seals on the injectors. Bosch kits work great, from any parts store ($36). (I have an '89 N/A in the shop now that the fellow did the HG himself, in a big hurry, but it won't run good due to bad (not replaced) injector seals. A lot of work now to replace them. Use all the hoses you can (cheaper$$) from the parts house, then you WILL NEED 1-2 from Toyota. (back of head) New breather hose (Toyota) from head down to block (under alternator). PCV hoses, and clean tubing. EGR system...clean everything. Route coolant hoses off of the throttlebody. That hot water is for heating up the TB, and removing it will get cooler air into intake (cooler air = more HPs). I left it to the ISC valve. I got 2 big vacuum caps and plugged the TB pipes. Fix everything you find wrong or messy now. Tape the wiring an route it nice. Make sure you don't allow any hoses or wiring to rub on anything. Colored Zip-ties are your friend. __________________ 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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