Problems with V 8-6-4 ???? - Page 2
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500, 472, 425, 368 Discussion, Problems with V 8-6-4 ???? in Cadillac Engine Technical Discussion; One of my dads friends is a mechanic and has a 1982 deville. He has had 3 BRAND NEW HT4100's ...
  1. #16
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    Re: Problems with V 8-6-4 ????

    One of my dads friends is a mechanic and has a 1982 deville. He has had 3 BRAND NEW HT4100's in it and they all didn't go past 60k miles. He got tired and threw in a chevy 350 in it. My caddy has the most powerfull HT4100 you'll ever drive.
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    Re: Problems with V 8-6-4 ????

    Quote Originally Posted by caddeville
    Very fragile motor???? No man, my dads 4100 has 170,000 miles and has plenty of power and he doesn't drive it like a baby. We were 1 1/2 hours late to airport for my uncle, and my dad beat the living shit out of that motor. I could swear that the rpms were maxed out. Still runs like a clock and we never had ANY gasket issues!! Take off is great also. My dad drives the caddy like he drove his M6. Tranny is also original, the car just needs engine mounts. I took out the plugs from bieng 8 years old, and they looked new. The 4100 isn't bad in the FWD cars, 82-85 RWD cars, that engine is useless. That is where you start to blow everything.
    You again? Come on we went thru this in the other thread.... in the other section......
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  3. #18
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    Re: Problems with V 8-6-4 ????

    Quote Originally Posted by caddeville
    One of my dads friends is a mechanic and has a 1982 deville. He has had 3 BRAND NEW HT4100's in it and they all didn't go past 60k miles. He got tired and threw in a chevy 350 in it. My caddy has the most powerfull HT4100 you'll ever drive.
    Want a cookie?

    Here:



    Now please take your highly loved HT4100 someplace else.
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  4. #19
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    Re: Problems with V 8-6-4 ????

    Dont hijack this V-8-6-4 thread Caddeville.

    In comparison to the '70s cast iron block behemoth V8's, the HT4100 is a fragile motor. The '70s V8's never needed pellets to keep the coolant in, and they didnt leak coolant, and their heads never warped.
    To quote Illumina, who is a Caddy small block genius

    - "The most notoriuous issue with the 4.1 liter was not only the water pump, but the intake manifold gaskets, in which I've had one fail on my old '87. The reason behind this was that the engine design and the materials used and the gaskets used didn't quite agree with eachother from day one. When the 4.5 liter came out, more stringent torquing requirements were applied to help fix that problem.

    Once the intake gasket blew or just developed a leak, water would then penetrate into the oil galleries and get in between the cam lobes and the lifters, soon wiping out the cams on the cars (which were weak in the first place). The 4.5 lilter engines improved this issue via the new torquing requirements and introduced the roller cam into the 4.x engine family."
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  5. #20
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    Re: Problems with V 8-6-4 ????

    i never said i liked the ht4100. Was the v8 6 4 powerful when in v8 mode?
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  6. #21
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    Re: Problems with V 8-6-4 ????

    i never said i liked the ht4100.
    omg.....

    Was the v8 6 4 powerful when in v8 mode?
    yes.
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  7. #22
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    Re: Problems with V 8-6-4 ????

    No, it was like driving a 307 powered Brougham. If nothing else, a HT4100 1987 deVille may have better acceleration.
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  8. #23
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    Re: Problems with V 8-6-4 ????

    Quote Originally Posted by I~LUV~Caddys8792
    Dont hijack this V-8-6-4 thread Caddeville.

    In comparison to the '70s cast iron block behemoth V8's, the HT4100 is a fragile motor. The '70s V8's never needed pellets to keep the coolant in, and they didnt leak coolant, and their heads never warped.
    AMEN!
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  9. #24
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    Re: Problems with V 8-6-4 ????

    the regular 368 was a fine engine for the car... less power then the 425, but it wasn't too bad, it was torquey.

    Considering the other engines used in the RWD DeVille/Brougha, the 368 was the last decent engine... in terms of power... then the 350 at the final years.

    The HT4100 was pathetic, no matter how you sliced it, the 368 was far better.

    The 307 wasn't a bad engine... I have nothing against it, in fact I like them... but they were better cuited for the lighter G-bodys... plus the lack of any performance parts and the fact they sip thru straws dosn't help.

    the 305/350 in the final years were decent engines... more powerful... but a SBC? wow.... everything from a Chevette to a Mustang has a SBC now.....

    There is a reason the commercial chassis (limos, hearse etc...) kept the 368 for a few more years until the 307 was used. The HT4100 was a gutless POS, and the guys at Cadillac realized that by making the big and heavy car even bigger and heavier, it wasn't going to work, so they kept using the 368 until the 307 took over. Atleast they were smart about that.... could you imagine an HT4100 in a stretch limo? my gosh....
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  10. #25
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    Re: Problems with V 8-6-4 ????

    Here's how I think of it:

    500/472/425/368: California Redwood


    HT4100: birch tree
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  11. #26
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    Re: Problems with V 8-6-4 ????

    Quote Originally Posted by I~LUV~Caddys8792
    Here's how I think of it:

    500/472/425/368: California Redwood


    HT4100: birch tree

    Dude, the Birch is a cool tree.... that would be like the Ecotec or something....

    This is the HT4100:

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  12. #27
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    Re: Problems with V 8-6-4 ????

    Ouch.
    This one may be good also:

    The HT4100, just a great big pain in the ass!
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  13. #28
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    Re: Problems with V 8-6-4 ????

    Here's the HT4100 after a race:
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  14. #29
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    Re: Problems with V 8-6-4 ????

    LOL! Yup, that about explains it.

    Although there is hope... all this scrap junk then gets recycled and turned into nice, useful stuff....

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  15. #30
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    Re: Problems with V 8-6-4 ????

    Another happy HT4100 owner!

    He must have just seen his coolant leak on the garage floor!
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