Revving engine too high?

geoff5093 · #1 10-30-2005, 07:12 PM

I wasnt positive where to put this, so i put it here. My friend recently was driving and he passed someone in 2nd gear and he got his RPM's up to 7000 (red line is 6500 i believe). He said that nothing really happened after that, but when he shut it off and started it back up later it started smoking, he said it was a fair amount of smoke. I wasnt there so i dont know exactly what it looked like, thats just what he told me.

So my question is, what do you think could have happened, and what could have gotten damaged? I googled for it and one guy said that he had to replace the water pump because of revving up too high.

All i know about his car is that its a Saturn compact-sedan.

TheSilentChamber · #2 10-30-2005, 07:57 PM

Did it smoke constatly or did it just smoke for a second then stop? Also what kind of smoke was it?

geoff5093 · #3 10-30-2005, 08:09 PM

Quote:

Originally Posted by TheSilentChamber

Did it smoke constatly or did it just smoke for a second then stop? Also what kind of smoke was it?

as i said, i wasnt there. But what i could gather was that he said smoke was coming out of the cracks in the hood, and it was around the same or a little less smoke then what you would see from an overheating engine. Im not sure if it smoked constantly or just once its turned on.

TheSilentChamber · #4 10-30-2005, 08:40 PM

Tell your "buddy" to find out for himself and stop trying to ask a guy who knows a guy who is very high up in the government.

Black Lotus · #5 10-30-2005, 09:29 PM

Quote:

Originally Posted by TheSilentChamber

Tell your "buddy" to find out for himself and stop trying to ask a guy who knows a guy who is very high up in the government.

Haaaaaaa!
--------------
Hopefully, just some oil got pushed out of the engine and onto the exhaust.

geoff5093 · #6 10-31-2005, 08:16 AM

he didnt ask me to ask you guys, i just want to know for myself so i can make fun of him

bjdm151 · #7 11-02-2005, 11:32 AM

Tell Him by overrevving it he stretched a rod and bent a valve allowing oil into the exhast causing the smoke. That should make him worry.

curtis73 · #8 11-03-2005, 08:35 PM

Don't incite a panic. He could have blown a head gasket. That's happened to me a couple times before. For the most part, today's engines have a redline determined by powerband, not capability. That is to say, Its just that his engine doesn't make any more power above 6500 so there is no use to rev it that high... not that it will explode above 6500.

7000 should be safe for that engine, but its possible that it exposed a weakness; like a head gasket that was about to blow. Tell him that if its white steamy smoke, he's burning coolant and he either blew a head gasket, cracked a head, or cracked the block (the blocks were a weak-ish point on Saturns) If its blue-ish smoke then its oil and he may have cracked a ring, lost a valve stem seal, or scored a bore from too much piston speed. Of those three options, the cracked ring is typically the more probable. The bores get a ridge of wear at the top and excessive RPMs can let things temporarily stretch letting the piston up just .0001 more inch allowing the rings to contact the ridge and crack them.

mazdatech177 · #9 11-05-2005, 01:52 PM

hmm, all very good and very technical explanations.... but hopefully he just pushed some coolant out of the overflow tube and that was what was burning for a few minutes

mazdatech60 · #10 11-08-2005, 11:41 AM

tech177 i think those are a sealed coolant system

mazdatech177 · #11 11-08-2005, 11:42 AM

fo shizzle?

mazdatech60 · #12 11-08-2005, 11:43 AM

geyahhh!

mazdatech177 · #13 11-08-2005, 11:44 AM

whats for lunch today?
taco bell sound good?

mazdatech60 · #14 11-08-2005, 11:46 AM

actually im goin to your mothers house, gonna start a small fire in her panties. lol
yeah taco bell

mazdatech177 · #15 11-08-2005, 11:48 AM

hey hey... get off the moms..... cause i just got off yours.
we better hurry man, its almost 12

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