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Memories Of The Old GM And Its Cars

383 messages,  Last post on Nov 12, 2009 at 5:33 PM

You are in the Automotive News & Views Forum. Your Hosts are steve_ & claires

What is this discussion about? Chevrolet, Cadillac, Buick, Classic Cars


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#141 of 383
Re: Buy a Cadillac DTS... [isellhondas] by cadillacmike
Jun 06, 2009 (6:00 am)
Reply

Replying to: isellhondas (Jun 05, 2009 5:35 am)

The "Case Half" leak is true but all it caused was a slight oil leak, on forums dedicated to the models, most people with this just add an extra quart every 1500 miles or so. By 1998 or so, the castings were revised to cure this, and it was not in a high percentage of the engines.
 
I find it amusing that as recently as the late 90s Honda's still needed valve jobs, etc.
#142 of 383
Re: Lubricants [hpmctorque] by blh7068
Jun 06, 2009 (6:13 am)
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Replying to: hpmctorque (Jun 06, 2009 5:48 am)

"Let's not forget the role of improved lubricants in extending engine life. I think that synthetic oils, such as Mobil 1, can greatly extend engine life, by reducing friction and wear. Today's lubricants are so much better than those of decades past. Of course, higher operating temperatures require better oils, but I believe the new oils, especially synthetics, more than compensate for the greater needs of modern engines. "
 
Id agree...but other than the select vehicles that require it, I wonder how much of the auto population is using it vs traditional oil. Without researching, my gut says its far from mainstream. I realize I could be 100% incorrect here.
#143 of 383
Re: The Vega [xrunner2] by blh7068
Jun 06, 2009 (6:15 am)
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Replying to: xrunner2 (Jun 06, 2009 5:52 am)

"Had far less than 75K miles on my 71 Firebird 400 and was driving in left lane of 6-lane freeway (3 each way)."
 
Was your 'bird a Formula( dual scoops on hood)? I posted a pic of my 71 'bird a few pages back.
#144 of 383
Re: Buy a Cadillac DTS... [cadillacmike] by xrunner2
Jun 06, 2009 (6:22 am)
Reply

Replying to: cadillacmike (Jun 06, 2009 6:00 am)

The "Case Half" leak is true but all it caused was a slight oil leak, on forums dedicated to the models, most people with this just add an extra quart every 1500 miles or so. By 1998 or so, the castings were revised to cure this, and it was not in a high percentage of the engines.
 
Just added an extra quart? Good GM engineering? Why did GM engineering not get it right the First time with the castings?
 
Over last couple decades, have heard numerous times of people complaining that their GMs need a quart of oil every 1K-1.5K miles AND there was no leaking. When they go back to dealers to complain, service person says that that oil consumption is within normal parameters and nothing is done.
#145 of 383
Re: The Vega [blh7068] by xrunner2
Jun 06, 2009 (6:24 am)
Reply

Replying to: blh7068 (Jun 06, 2009 6:15 am)

Was your 'bird a Formula( dual scoops on hood)? I posted a pic of my 71 'bird a few pages back.
 
Yes. It was medium blue metallic in color. Also had a 71 Trans-Am 455 HO and 68 Firebird 400 all at same time.
#146 of 383
Re: The Vega [xrunner2] by blh7068
Jun 06, 2009 (6:37 am)
Reply

Replying to: xrunner2 (Jun 06, 2009 6:24 am)

"Yes. It was medium blue metallic in color. Also had a 71 Trans-Am 455 HO and 68 Firebird 400 all at same time."
 
Wow- all remain highly desirable today...especially the TA.
 
Do you still have any of them?
#147 of 383
Re: The Vega [xrunner2] by imidazol97
Jun 06, 2009 (7:18 am)
Reply

Replying to: xrunner2 (Jun 06, 2009 5:52 am)

>Stupid
engineering(?) by GM.
 
Actually it was done to quiet the noise from metal gears and the chains. The same people unhappy when the nylon (not plastic IIRC) gear wore were the ones who would complain about gear noise.
 
I understand being unhappy with a failure, but they usually gave forewaring. A Ford 351W I owned gave some signs of individual teeth having worn on the one gear. Later the chain slipped. I believe that was the car that left me saying I'd never own another Ford. Regrettably I won one in a contest a few years later.
 
But I digress from the topic and in lieu of a reminder from our gentle hosts, I'll slip my timing chain a notch on the worn gear to ask:
 
Were both gears nylon or just one of the timing gears?
 
OR GM could have used a timing belt like some other cars and required replacement every 60K miles for a few hundred bucks.
#148 of 383
Re: Lubricants [blh7068] by steve_ HOST
Jun 06, 2009 (7:19 am)
Reply

Replying to: blh7068 (Jun 06, 2009 6:13 am)

I think part of the point was that all oils have gotten a lot better over the years, not just the synthetics.
 
Friends had a Ford Escort back in the 80's and they lost a nylon gear or sprocket before 50k. Left them shaking their heads when they discovered Ford was putting "plastic" gears in their engines.
#149 of 383
Re: Lubricants [steve_] by roadburner
Jun 06, 2009 (7:47 am)
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Replying to: steve_ (Jun 06, 2009 7:19 am)

I knew the bean counters were taking over GM when I discovered that the stock 2V carburetor on my 1974 Monte Carlo was mounted with only two bolts...
#150 of 383
Re: Buy a Cadillac DTS... [cadillacmike] by isellhondas
Jun 06, 2009 (8:12 am)
Reply

Replying to: cadillacmike (Jun 06, 2009 6:00 am)

You find it "amusing" that Hondas in the late 90's needed valve jobs?
 
Absoultly not true! No truth to that at all. Ask any Honda mechanic.
 
Sometimes when little old ladies drove them too gently, carbon would build up under the valve seats (any car will do this). Sometimes we need to do a "Carbon Blast" which blows these carbon deposits out.
 
As far as your "slight" oil leak, if you happen to live in So. Calif you can check out my buddies driveway where his 1994 De Ville used to sit before it's untimly demise.
 
It leaked pretty bad as the leak continued to get worse. According to some shops I know the problem was pretty common.
 
Please confirm that 1998 was the year they made the revision. My friend loved that car (so did I) and he wants another one but he doesn't want to face the oil leak situation again.

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