FYI For Those Who Have Head Bolt Issues Now Or In The Future
Came across this on eBay and just thought I would give everyone a heads-up. Also found a company on eBay supplying rebuilt Northstar engines for $2,995 + 200 for shipping and they come with a 3 year warranty! Not too bad! Complete head sets for dirt cheap too on eBay. Anyway, just thought I would share as I have no affiliation with any of this just to clarify.
NORTHSTAR ENGINE BLOCK HEAD BOLTS THREAD REPAIR KIT Item number: 8076074105
price: US $349.00
End time: Jun-25-06 16:38:40 PDT (8 days 4 hours)
Shipping costs: US $15.00
US Postal Service Priority Mail®
Ships to: United States
Item location: Manheim, PA, United States
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Starting time: Jun-15-06 16:38:40 PDT
Duration: 10-day listing
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Seller: jdi7500 ( 19)
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Member: since Sep-08-00 in United States
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Have you been told that your Northstar head bolts are stripped out and there is nothing that can be done to fix it because it had already been repaired once before? That'* what happened to me! I bought a pre-owned 96 Cadillac SLS and started having problems with it overheating, only to find out it had been repaired once before with Coil type and Solid type inserts with Synchronized internal and external threads. I was told that a new block would be around $7000.00! After doing some research, I found out that the Northstar engines were notorious for this problem.
I am a Tool and Die Maker by trade, and out of necessity developed the NS300L Insert System (Patent Pending) . The NS300L Insert System is a thread repair kit I designed to out perform all other insert systems on the market. Unlike inserts with synchronized internal and external threads, the NS300L insert is a much larger and much stronger insert, with a much courser external thread, and having at least 3 times more engagement into the aluminum block than the common coil type and solid synchronized type inserts. There is nothing wrong with these type inserts, the challenge with these inserts is they do not grip enough of the already weak aluminum.
My Mechanic, who installed the NS300L insert System in my engine, was impressed with how well they worked. Not long after that, word got around and I received a phone call from another garage in the area that had the same problem that I did and heard that I had developed my own insert kit, they had a Northstar that was repaired once before with Coil type inserts, that had stripped out of the block. At their request I made an insert kit for them and they loved it!
I have sold several kits, and have been hearing very positive results from buyers
The inserts are 1- ¾ inches long and have a M11 X 1.5 internal thread.
Inserts will work in "93" through "99" 4.0/4.6L NorthStar engines and most likely 2000 through 2003 with different depths of lower and upper bank holes.
I received a quote for a solid insert kit with synchronized internal and external threads to do all 20 bolt holes for over $350.00 (the same inserts that pulled out of my block), and a oversized insert kit to do all 20 holes for over $400.00.
Insert Kit includes:
21 Threaded inserts (steel).
1 Tap Drill (17/32" - same size as the counter bores in engine block).
1 5/8-11 Plug Tap
1 5/8-11 Bottom Hand Tap
1 Tap and Tap Drill Alignment Block.
1 "Tap Magic" tapping fluid.
1 LOCTITE 266,(shown) or Permatex high temp. high strength thread lock(10ml).
Will accept payment through PayPal or a U.*. Postal money order