Check this website out. Are these guys on the right track to right the wrongs in the 4.1 and 4.5?

I wouldn't mind getting a new engine from these guys when my engine goes.

Has anyone bought from them? Anyone think it will really add some balls to the 4.1 or 4.5?

Here's the link...

http://remanufactured-engines.com/page11.htm

Here's what changes they make...


Internal upgrades include a better intake gasket to stop internal coolant leaks.


Improved camshaft composition to resist lobe mushing and to combat accelerated distributor gear wear.


Improved cam bearings for better oil pressure and better retention when hot.


Better main bearings with tighter clearances to improve oil pressure.


Cast iron oil pump with greatly improved wear characteristics over the soft aluminum pump.


Cylinders "potted" for better O-ring sealing.


Sealed Power rings.


Tighter rod bearing clearances for improved oiling.


Bronze valve guides on both intake and exhaust valves.

It sounds like they are addressing the problems and sound like they know what they are talking about. The prices seem reasonable to me. They sure do recommend Slick 50 a lot. I always thought professional engine builders just preferred a good grade of oil changed regularly.

If they are really suggesting Slick 50, RUN away from that place. Biggest snake oil ever sold. They lost a Federal Trade Commision ruling, and were banned from making any claims about the product, and had to pay $20 million in damages.

Don't know if it was related, but my mother's MINT 84 received Slick 50 at 45 000 miles. At 50 000, it got a rod knock and went in for a replacement engine. This was before the settlement, of course.

marvels mystery oil. only way to go. i used to work at jiffy lube and the same company makes slick 50. it's a joke

I don't know about slick 50 either. what about the other mods they speak of that I listed?

It sounds like they are addressing the problems and sound like they know what they are talking about. The prices seem reasonable to me. They sure do recommend Slick 50 a lot. I always thought professional engine builders just preferred a good grade of oil changed regularly.

I still have the same reaction when I look at thier site. This time I was curious enough to email them about thier Slick 50 experiences. To me, it would be like buying a book with all kinds of great tips on how to pick up women, then finding out it was written by Elton John. If a guy believes in Slick 50 when most professionals don't, then how much does he really know about engines? The site looks quite professional and they list a LOT of engines, so it boggles my mind. I'll pass on any info that they send me. Peace.

OK, it's winter time and I'm bored and I was curious about this websites recommendations of Slick 50, so I sent them an email for my own curiousity.
This is the response I got :

:stirpot:



I have been looking at your site for a friend to help him decide on an
engine. Your improvements for the Cadillac 4.1 sound like great
improvements to the reliability of this engine. I was a little
surprised to
hear that you are a strong supporter of Slick 50. I have never heard
any
professional engine builders that believe in the stuff. I'm just
curious
what results you have seen with this stuff and why you think it is
beneficial. Thanks


Sorry,
Due to either tooling limitations or parts availability through
existing
suppliers we cannot help you with this project. The remanufacture of
car,
light truck and inboard engines is our field although some 1% of those
engines have demands we are not set up to satisfy. We hope to help you
in
the future on something else and good luck with this project.

Dane Winter
Remanufactured.com

:cookoo:


It makes you wonder what is behind a website sometimes. Sounds like some kind of automated robot to me. I wouldn't be sending any money there.

Probably a sales guy form letter. He probably thought you were whacky too...

Still curious that they have the endorsements there though.

I thought the original problem with the 4.1 l was the lack of block rigidity. GM training manuals say that the extra ribs in the later and larger displacement motors are the secret to their longevity. Unless you go with a ribbed block, can you really upgrade it? The 4.9 also had a better oiling system. I don't know if it will retro fit into the earlier blocks. But pumps were completely different.:stirpot:

They sorta fixed that in the FWD 4.1 blocks. The RWD blocks had very few ribs.

Engines made in 1985 and later have ribs. Earlier ones do not. Rocker supports were also beefed up after 1984. My early 1985 Deville has a 1984-made engine, but my later 1985 Deville has an 85 engine (aluminum/finned valve covers).