Originally posted by RifleBowPistol
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I had fun with one parts counter expert one day, about five years ago. I needed some part for around a 2002 Mustang GT, probably spark plugs and some coils. So if you don't know, all of the 1996 through 2004 GTs, have 4.6 2 valve engines, then all of the Cobras from 1996 to 2004 have 4 valve engines. If you know engines, 100% of the time a engine with a 2 valve head, will be a single over head cam engine. Then a 4 valve engine will be double over head cam engines about 95% of the time. There have only been a few 4V engines over the years that were not DOHC engines. I can't think of any right now. There have been a few pushrod 4V engines over the years, I know Mercedes built one for Indy car or Formula 1 years ago, think they may have made a factory production 4V pushrod engine around the same time. Then you have diesels like Cummins that are 4V, pushrod engines. But the vast majority if not 100% of the time, if you have 2V heads, you have a SOHC engine and a 4V engine is a DOHC engine.
So I went into O'Reilly's for some plugs and coils for a 2V GT. The kid behind the counter, I knew was driving a brand new Mustang with a Coyote engine in it. He thought he was a car god. Coyote engine = 4V engine/DOHC engine. You would think a car god driving a Coyote Mustang would know a 2V engine from a 4V engine.
I really was not trying to start anything, when I walked in and told him I needed coils and plugs for a 2002 GT. Then he insisted on knowing what engine, I told him again, it's a GT, so it has a 2V engine. I left it at that. He said I need to know what engine it has in it. He started getting irritated with me. I again told him it's a 2002 GT, with a 4.6 2V engine. He got more irritated with me. Again told me, he needed to know what engine was in the car. I knew very well by this time what, info he wanted. But he should know being a car god and driving a Coyote Mustang. So I gave him the same info again.
He was to the point of boiling, and asked, does the car have a SOHC engine or a DOHC engine. I told him it has a 4.6 2V. Man, that set him off. I tried to give him a simple explanation of 2V and 4V, engines, but he knew to much to hear what I had to say. I pointed out how his Coyote engine is a 4V engine, by the way. That was the end of that conversation.
He did not work there much longer, after that. I don't know what happened.
As for the 2V or 4V, vs SOHC or DOHC. 2V and 4V is a lot simpler and faster to say, so those are the terms I use. Most of the time you hear guys using the terms SOHC and DOHC, they are FWD import guys, which I am not. But on the other hand 2V and 4V can confuse the older guys, older than myself, because they at least used to think of 2V as 2 venturi carb and a 4V as a 4 venturi carb. Most of them have long figured out that depending on when the car was made, whether it means 2 valve, 4 valve or 2 venturi, or 4 venturi.
Yes there are 3V heads and there were 3V carbs also. Ford made 3V 4.6s, 5.4s and 6.8 V10s. They were 3V engines, but only had one cam per head. So if you call them a SOHC engine, people could easily think you are talking about the earlier 2V 4.6, 5.4 or 6.8, engines.
Then on the subject of 3V carbs, Holley used to make a 3 venturi 950 cfm carb, back in the late 60s and early 70s.
Then Yamaha, made 5V heads for many years. They used them on their R1s, then their four stroke dirt bikes and Raptor 4 wheelers. Those were DOHC engines, so if you use the term DOHC R1 engine, you could be talking about any variation of R1 engine, but if you say 5V, it narrows it down to a 98-06 engines. Again, using the number of valves is better and faster to identify the type of engine.
So I went into O'Reilly's for some plugs and coils for a 2V GT. The kid behind the counter, I knew was driving a brand new Mustang with a Coyote engine in it. He thought he was a car god. Coyote engine = 4V engine/DOHC engine. You would think a car god driving a Coyote Mustang would know a 2V engine from a 4V engine.
I really was not trying to start anything, when I walked in and told him I needed coils and plugs for a 2002 GT. Then he insisted on knowing what engine, I told him again, it's a GT, so it has a 2V engine. I left it at that. He said I need to know what engine it has in it. He started getting irritated with me. I again told him it's a 2002 GT, with a 4.6 2V engine. He got more irritated with me. Again told me, he needed to know what engine was in the car. I knew very well by this time what, info he wanted. But he should know being a car god and driving a Coyote Mustang. So I gave him the same info again.
He was to the point of boiling, and asked, does the car have a SOHC engine or a DOHC engine. I told him it has a 4.6 2V. Man, that set him off. I tried to give him a simple explanation of 2V and 4V, engines, but he knew to much to hear what I had to say. I pointed out how his Coyote engine is a 4V engine, by the way. That was the end of that conversation.
He did not work there much longer, after that. I don't know what happened.
As for the 2V or 4V, vs SOHC or DOHC. 2V and 4V is a lot simpler and faster to say, so those are the terms I use. Most of the time you hear guys using the terms SOHC and DOHC, they are FWD import guys, which I am not. But on the other hand 2V and 4V can confuse the older guys, older than myself, because they at least used to think of 2V as 2 venturi carb and a 4V as a 4 venturi carb. Most of them have long figured out that depending on when the car was made, whether it means 2 valve, 4 valve or 2 venturi, or 4 venturi.
Yes there are 3V heads and there were 3V carbs also. Ford made 3V 4.6s, 5.4s and 6.8 V10s. They were 3V engines, but only had one cam per head. So if you call them a SOHC engine, people could easily think you are talking about the earlier 2V 4.6, 5.4 or 6.8, engines.
Then on the subject of 3V carbs, Holley used to make a 3 venturi 950 cfm carb, back in the late 60s and early 70s.
Then Yamaha, made 5V heads for many years. They used them on their R1s, then their four stroke dirt bikes and Raptor 4 wheelers. Those were DOHC engines, so if you use the term DOHC R1 engine, you could be talking about any variation of R1 engine, but if you say 5V, it narrows it down to a 98-06 engines. Again, using the number of valves is better and faster to identify the type of engine.
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