another f*** up!!

tone loc · 06-14-2007, 05:41 PM

just got the head back today. cost $400 for a mag and mill and then a valve job

taking the block in next week

there is still a little gash do think it will effect anything? (second pic)

cre · 06-15-2007, 02:14 AM

Have a better picture of the "gash". The surface looks a little rough, if you're going with an OEM HG it's fine if you're going MHG I'd lap it.

tone loc · 06-15-2007, 07:06 AM

heres some closer pics

what does lapping consit of? how do i do it?

im going mhg

supramacist · 06-15-2007, 07:30 AM

Welp atleast most of that will be removed during the machining process.
So you have nothing much to worry about with the head.

But lapping the block is an entirely different story. It's not a quick job. I sanded on mine for a good while. You'll need a machined straight edge and a feeler gauge. You're going to need a sanding block long enough to lay across the block.

You have to remove the feeler or guide pins on the front and rear of the actual block. You'll need to stuff your cylinder walls with trifolded towels and you want to drop a bit below tdc. So you don't sand on 1 and 6.

Do yourself a favor and pull the damn thing and take it someplace and have it done right if you don't think you can handle it. It takes a bit the first time and you want to do it 1 fail swoop. Don't tear it down and let it sit for a few months.

I spent the better part of a year planning my build. It's nearly completed.

Good Luck.

tone loc · 06-15-2007, 02:12 PM

did you read this full thread supramacist? i have a jdm engine sitting on my garage floor and the picture of the head is after they got done maching

supramacist · 06-15-2007, 04:39 PM

Best of Luck.

dcrusupra · 06-15-2007, 04:57 PM

I wouldnt use it until that gauge is out of it. But if the machine shop said it was ok, you could press your luck.

I'm leaving this open but if people start fighting, I'll lock it.

06-14-2007, 05:41 PM	#1
tone loc 20psi boost Join Date: Jun 2006 Location: Chicago Posts: 706	just got the head back today. cost $400 for a mag and mill and then a valve job taking the block in next week there is still a little gash do think it will effect anything? (second pic) Attached Thumbnails

06-15-2007, 07:06 AM	#3
tone loc 20psi boost Join Date: Jun 2006 Location: Chicago Posts: 706	heres some closer pics what does lapping consit of? how do i do it? im going mhg Attached Thumbnails

06-15-2007, 04:39 PM	#6
supramacist 1000whp postwhore Join Date: Apr 2007 Location: Escape from the Prison Planet Posts: 1,356	Best of Luck. Last edited by supramacist; 06-15-2007 at 06:31 PM.

06-15-2007, 04:57 PM	#7
dcrusupra 500whp yet? Join Date: Aug 2005 Location: Plantation, Fl. Posts: 1,052	I wouldnt use it until that gauge is out of it. But if the machine shop said it was ok, you could press your luck. I'm leaving this open but if people start fighting, I'll lock it. __________________ New Rebuild My CarDomain

06-15-2007, 02:14 AM	#2
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Have a better picture of the "gash". The surface looks a little rough, if you're going with an OEM HG it's fine if you're going MHG I'd lap it.

06-15-2007, 07:30 AM	#4
supramacist 1000whp postwhore Join Date: Apr 2007 Location: Escape from the Prison Planet Posts: 1,356	Welp atleast most of that will be removed during the machining process. So you have nothing much to worry about with the head. But lapping the block is an entirely different story. It's not a quick job. I sanded on mine for a good while. You'll need a machined straight edge and a feeler gauge. You're going to need a sanding block long enough to lay across the block. You have to remove the feeler or guide pins on the front and rear of the actual block. You'll need to stuff your cylinder walls with trifolded towels and you want to drop a bit below tdc. So you don't sand on 1 and 6. Do yourself a favor and pull the damn thing and take it someplace and have it done right if you don't think you can handle it. It takes a bit the first time and you want to do it 1 fail swoop. Don't tear it down and let it sit for a few months. I spent the better part of a year planning my build. It's nearly completed. Good Luck.

06-15-2007, 02:12 PM	#5
tone loc 20psi boost Join Date: Jun 2006 Location: Chicago Posts: 706	did you read this full thread supramacist? i have a jdm engine sitting on my garage floor and the picture of the head is after they got done maching