: 98 ETC Head Gasket project started today...



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hfg1551
06-23-12, 11:47 PM
Thanks Steve,

That was kind of what I figured after reading the discussion about the tool.

Jim

Faded Crest
06-23-12, 11:57 PM
Jim, when I split my block, the rear main seal basically almost fell out. That's why I asked if it could be reinstalled that way. But I wouldn't try it. Like Steve said, it is pressed to a certain depth.

ternstes
06-24-12, 12:40 PM
That tapered piston ring compressor is amazing! Even upside down, it is a breeze tapping the pistons back into their bores.

Glenn Delwood
06-24-12, 09:37 PM
Finally!!! Now I just need to find time. :rolleyes:



What's this?

Faded Crest
06-24-12, 10:56 PM
If you are referring to the picture, it is a Piston ring compressor that allows you to install pistons into the cylinders. The sleeve is tapered and is the precise size to fit a Northstar piston. As you slide the piston in, the rings compress so you can slide it in. Can't wait to try it out... Just need to find time.

Good pics of one in action here, Glenn...

http://www.cadillacforums.com/forums/northstar-performance-technical-discussion/257508-diy-northstar-head-gasket-crankcase-leak-35.html

Glenn Delwood
06-25-12, 01:27 AM
Only having done one N*, I would vote on waiting till after the lower case is cinched down. My one experience was using the latest, genuine GM seal.

The inner portion of the seal is metal (at least on the year engine I worked on), and pressed over the crankshaft. The tool that I used, the latest version, forced the seal to be installed straight, not cocked, and to a specific depth - the tool stopped when it encountered the block/lower case. With that seal, I would not attempt to install it before the lower case was mated with the block.

Cheers,
Steve

What tool are you referring to?

Glenn Delwood
06-25-12, 01:29 AM
If you are referring to the picture, it is a Piston ring compressor that allows you to install pistons into the cylinders. The sleeve is tapered and is the precise size to fit a Northstar piston. As you slide the piston in, the rings compress so you can slide it in.

So if I take my pistons out, I'll need one?

Faded Crest
06-25-12, 01:40 AM
Glenn, Steve (eyewonder) was talking about the rear main seal installer tool. It is a specialty tool that presses the rear main seal to the crankshaft output. You will absolutely need that tool if you do the rear main seal. They aren't cheap, but here is a great deal for one....

http://www.ebay.com/itm/Kent-Moore-J-45930-Cadillac-Northstar-V8-Engine-Rear-Main-Seal-Installer-/271002663689?pt=Motors_Automotive_Tools&hash=item3f19047b09&vxp=mtr#ht_1218wt_952

As for the piston compressor, you don't necessarily need that exact tool, but you will need some kind of piston ring compressor if you pull your pistons out. You could always use the older style piston compressor tool that is adjustable, but these are far superior and easier to use.

Glenn Delwood
06-25-12, 02:41 AM
As for the piston compressor, you don't necessarily need that exact tool, but you will need some kind of piston ring compressor if you pull your pistons out. You could always use the older style piston compressor tool that is adjustable, but these are far superior and easier to use.
That crankcase tool wasn't cheap. I guess I could sell it afterwards. :)
If I plan to check/replace the rings I might as well get a tool to put the pistons back. I could use them. :) Where and how much for that piston compressor?

Faded Crest
06-25-12, 12:36 PM
Glenn, click the link on my post #255. Someone has a line on a less expensive ring compressor sleeve. Like $30. Mine is an ARP tool and was around $60 delivered. I would have bought the $30 one if I had seen the link in time. That press actually is pretty "cheap" at $99. There are those who have paid over $300 for the same tool. I think I paid $115 for mine.

bill buttermore
06-25-12, 07:43 PM
I bought that same rear seal tool from Blackhat auctions for $99. That is a great price.

Glenn Delwood
06-28-12, 05:51 PM
Just wondering if this crankase sealing tool is useful for any other application or is it SPECIFIC to the northstar (or GM only?)

RippyPartsDept
06-28-12, 06:08 PM
you mean the rear main seal install tool ?

if so, then i'm pretty sure it's only for NorthStars

CadillacLuke24
06-30-12, 05:57 AM
Good work Faded! Bout there!

wingman65
07-30-12, 12:58 AM
Great thread, will be like having a new motor when done. How is the progress coming, its been awhile since your last post.

chasd
09-23-12, 11:28 AM
How did it finish?

CadillacLuke24
10-25-12, 02:26 AM
Faded! WHEEERRE arrrre YOOOUU?