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Author Topic:   another oil pressure problem
02 Blewbyu
Dirt Full Roller

Total posts: 48
posted May 15, 2005 01:12 AM  
I just built a new car and had a 400 sbc built. I got in about 6 hot laps and heard 2 clunking noises I got the car into the pits and shut it off let it cool down for a while. I started it after it sat for a while and the oil pressure was about 5 pounds and I heard a squeeling noise so I shut it off. This all happened in a matter of about 3 seconds. any ideas? This just happened tonight so I havent had a chance to tear it down yet. After all this happend a friend of mine that took the car to the tech inspection for told me said the tech official pulled a valve cover off and notice gas sitting on top of the rocker arms.

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Stomp and steer racing

Eljojo
Dirt Forum Champ
Total posts: 968
posted May 15, 2005 05:02 AM  
Pull it out and apply for a new mastercard. Sounds like your fuel pump filled the crankcase with fuel and thinned out the oil. With the engine oil compromised, it was unable to lubricate the bearings and they seized. If you are VERY lucky you may be able to turn the crankshaft and rebuild....if you aren't so lucky, you may be looking for a new motor.

02 Blewbyu
Dirt Full Roller

Total posts: 48
posted May 15, 2005 09:12 AM  
is this a common problem? Well I hope my engine sponser hooks me up again.

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Stomp and steer racing

Raz_900
Dirt Forum Champ
Total posts: 635
posted May 15, 2005 06:56 PM  
Wouldn't say the fuel in oil is a common problem, but it does rear it's head from time to time.

At the very least, it's overlapped a rod bearing (the squealing) and probably eaten the crank for dinner. If you're really unlucky, the squealing is a spinning cam bearing or main bearing in which case the block is pretty much s****.

02 Blewbyu
Dirt Full Roller

Total posts: 48
posted May 15, 2005 07:16 PM  
Today I was going to pull the engine out of the car and tear it down. I wasnt really in the mood to pull it out but I drained the oil and cut the filter open. I wasnt really surprised but I have never seen so much metal stuff in oil. Well Im really bummed out now after building one of the nicest cars at the track and spending my hard earned money on a motor that was suppose to be professionaly built unit. Looks like the only racing I will be doing this next weekend will be on the Ps2

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Stomp and steer racing

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