Cadillac Valve Stem

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Cadillac Valve Stem
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One of the most common causes of engine failure, in the stock VW Beetle, and Karmman Ghia, is exhaust valve stem crystallization of the metal. The valve head frequently sheared into the combustion chamber. This Phenomena occurred historically, most often in Cylinder # 3.

The strength and elegance of the older VW engine is that it is air cooled. The blower sits on top of the engine and directs the flow of air through the oil cooler and onto cylinder #3. Apparently the heat in number 3 is sufficient to cause exhaust valve failure over time as the brass valve guides wear.

In the air cooled engine valves are cooled by contact with the valve seat, and contact with the valve guide. The Valve stem is polished, hardened steel, and the guide is brass. As the brass guide wears exhausting gas follows the valve stem into the guide further degrading the brass, and increasing the gap between the moving valve stem and the guide. The net result over time, particularly with the Vintage VW part cylinder #3, is breaking off the exhaust valve head, which enters the combustion chamber, and punches a hole through the piston. Incredibly, the VW engine can still run after this event, noisily at first, then quieter after the valve head finds its way into the crankcase. Obviously the engine will not run well, and the metal shards will eventually damage the crank case components.

It is common to see this type of failure as early as 60,000 miles. Failure is not 100% but likely enough to erode reliability confidence. If you are operating a high mileage VW engine, or rebuilding a Vintage VW engine, it is advisable to review options for replacing stock engine heads with custom heads, modified to remedy the weakness of the vintage VW parts.

Several re-manufacturers offer some very capable options to vintage VW parts. It is important to research all of your options as you make buying decisions for rebuilding or maintaining your older VW engines.

To learn more about buying Vintage VW Parts visit us today at http://www.Buy-Vintage-VW-Parts.com

William Price is the owner of http://www.Buy-Vintage-VW-Parts.com where you can get up to date information, compare prices, shop multiple vendors and research additional ways to rebuild or simply maintain your older VW in tip top shape.

There Are Several Engine Options To Choose When Buying The 2009 Pontiac Torrent

The Torrent, Pontiac's midsize crossover SUV, ended production in the summer of 2009. Leftover 2009 models offer a choice of 3.4-liter and 3.6-liter V6 engines.

The base Torrent uses the 3.4-liter LNJ engine, with 185 horsepower and 210 lb-ft of torque. This 12-valve, iron-block pushrod V6, now manufactured in China, is a very old design. Its basic architecture dates back to 1980, although GM revamped it extensively in the early nineties, with aluminum cylinder heads, roller rocker arms, and an aluminum intake manifold. For 2009, it received a number of minor changes to improve reliability, including more durable valve seats, chromed and polished valve stems, and a revised electronic throttle control system. The 3.4-liter engine's power is not impressive for this class, although it gives the Torrent adequate acceleration. High revs betray its age with a gruff sound and feel, but it has good low-end torque and decent fuel economy. EPA estimates are 17/24 for both FWD and AWD models.

The Torrent GXP, added in 2008, uses the much more sophisticated 3.6-liter LY7 engine. This all-aluminum, 24-valve DOHC V6 is part of GM's "High Feature" engine family, developed by GM and its Australian subsidiary, Holden. First seen in the Cadillac CTS sedan in 2004, it has variable valve timing on both the intake and exhaust cams, and variable-length intake runners to optimize torque at different engine speeds. In the Torrent GXP, it has 264 horsepower (up from 263 in 2008) and 250 lb-ft of torque. The high-tech V6 gives the Torrent much stronger performance, although some reviewers complain that it sounds even coarser and less refined than the elderly 3.4-liter pushrod V6. It also burns slightly more fuel; the FWD Torrent GXP matches the 3.4-liter's 17/24 EPA rating, but the AWD version falls to 16/24. Both engines burn regular fuel.

About the Author

Ronnie Tanner is a contributing writer at SWEngines.com. He writes about Pontiac Torrent Engine and other industry specific topics.

Why is my new tire flat everyday? How can I fix it?

We got a new tire cuz I ran over a huge chunk of glass, ever since that knew tire has been problems. At first we were to cheap to get a valve stem cover thingy on so that was the problem took it in to get a new valve stem thingy, the very next day it was flat again. So after having to fill the tire everyday I broke down and brought a new tire and the very next day flat as can be! Do I have to purchase a new rim, cuz I really dont want to. I thought that maybe from sitting on the rim when its flat maybe bent it or something. So my nice Cadillac is looking like a hoopty ride with a flat tire everyday please help me!

take it back to the tire shop where you bough the tire and have them check for leak's. they should do this for free. Could be the rim and if so they should be able to tell, but also could be something they did when they mounted the tire on the rim.

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