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I'm wondering if the HT4100 can have cast heads instead of aluminium. I believe the heads may be the main reason I'm having to have the engine rebuilt.

Mr. S****,

Thanks for checking us out……... The heads are iron. It's the block that is aluminum. Generally speaking, the heads are relatively trouble free. If you have coolant in the

oil the likely source is a warped intake. The down side is that glycol

coolant mixing with the oil creates a low grade organic acid that attacks

the main, rod and cam bearings so there will be that additional damage. Just

changing the intake and heads will probably not work for very long if at

all.


Dave

my car is a 1976 Cadillac Eldorado, it is front wheel

drive and I have the original 500ci carburated engine in it. My questions are:

1. Can I put in a 472ci Cadillac engine, a chev 350ci/454ci, or any other cadillac engine instead of the original 500ci in my car?

>Not exactly. I believe the 71-74 472 is a good swap with a fuel pump block off plate if your 500 has EFI. I don't think

>your a.i.r. system will work on the earlier 472.

>The others are way way more difficult. Start by changing the trans.

If so, what modifications must be made (to the oil pan and/or

transmission)? Does the engine have to be from a front wheel drive car

like mine?

>No, but you have to make sure the block is drilled in the proper location for the dipstick .

Can a 500ci engine from an earlier year (i.e. 1972 Eldorado)

be dropped in in place of my original 500ci?

>Not exactly

2. Would my transmission have to be changed if I got another engine installed?

>Yes. for a chev 350ci/454ci,

If so, what would I need?

>Turbo 350 or 400 for a Chevy

>DS

I WOULD LIKE TO UPGRADE MY CADILLAC 4.1 ENGINE TO HAVE MORE PERFORMANCE. I

HAVE SEEN A 1985 WITH A 350 ENGINE. IS THIS POSSIBLE AND CAN YOU DO SUCH A

SWAP? ANY INFORMATION ON THIS WILL BE GREATLY APPRECIATED:

THANKS:

BILL ***


Mr. ***,

We limit upgrading this engine to a custom version of the 4.5 liter engine for a few different reasons, not the least of which is laws from state to state that consider a complete engine change the removal of legally required anti pollution equipment. (fines)

The other alternatives are also heavy and require a computer change, front end alignment, changing the brake proportioning valve, myriad bracket pulley, plumbing and bracket changes, manifolds, exhaust, etc. In short, if you find someone to do it, add at least a few thousand dollars. We party poopers won't do it at any price. ()

The 4.5 liter engine improves the power situation significantly for not a lot more money and it's difficult to tell the different from the original HT4100 engine other than the power increase.

Having said this, you should know that the design is almost identical to the 4.1 from a reliability standpoint BUT we make over a dozen major changes and improvements to the original engine, whether 4.1 or 4.5. to make it very reliable.


Dave Schaffner

ASE cert. Master Mechanic

ASE cert. Master Machinist

remanufactured.com


> -----Original Message-----

> From: Jones D*****  **********.com]

> Sent: Friday, July 30, 1999 5:41 PM

> To: 'citizen@msn.com'

> Subject: Caddy engines...

> I have a 1990 FWD fleetwood with the 4.5 in it. I was wondering if you knew about any super/turbochargers that would fit this engine. Or any other ideas on tweaking out performance. This car is my 2nd car and my baby which im working restoring to new like condition but I also would like to make it a sleeper at the stoplight. The car has some pretty decent balls as it is, but i think that the GM T-whatever trans on it can handle quite a few more horsies... My friends and I were also joking about putting a turbo/supercharged 3800 in it.. Anyway any advice/information you could provide would be greatly appreciated.


Very limited options with this engine. I'm not aware of speed parts being available for it although there is certainly a market for it. I don't believe there is even a camshaft upgrade.


Some improvement can be had with valve and cylinder head work along with exhaust improvements. Advance the timing as far as possible and use Amoco Ultimate gas in the tank with Slick 50 or equivalent in the pan.


Dave Schaffner

remanufactured.com

-----Original Message-----
From: *************.org]Sent: Monday, May 03, 1999 4:12 AM
To: citizen@msn.com Subject:
hey. I saw your web page, and the section about engines for replacement in a 1985 Seville. Normally, people would replace the 4100 with another 4100 or maybe even a 4500. Since these engines are junk, is there any other engines to be put into consideration? Please let me know. thanks!

Changing to something else is not cost effective.

Replacing the somewhat buggy Ht 4100 engine with one of our bug fixed newer versions is.

  • 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.

Although some of the HT's reputation is deserved, much of it is like having Shannon Dougherty or Sharon Stone for a girlfriend. Even though it has a short temper at certain times the design is so attractive you wouldn't trade it in for a more reliable Ricky Lake type engine. Basically, never ever let it run hot. With it's lightweight bi-metal construction it's junk in 60 seconds. R&R and resurface the intake manifold every 60 thousand miles, get 20-w-50 oil changes, run Slick 50 or equivalent and the average HT will go over two hundred thousand miles. D.S.

The remanufactured Cadillac longblock engines larger than 368 inches and newer than 1970 may be had in HO versions that come with upgrade camshafts, Clevite bearings, 3 angle valve jobs and High volume oil pumps for only $200 more.

Our smaller Cadillac remanufactured engines have many improvements over the OEM version.

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