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Engine noise on decell.


burninator

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Under deceleration I seem to be getting a loudish rhythmic clanking noise from the engine. One friend who saw it said it sounded like hydraulic lifters making noise and that it could be from low oil pressure. I have an N42 head and I'm fairly certain it has solid lifters though. I don't have an oil pressure gauge hooked up at the moment, but I will by the next autocross (car is not street legal). The noise always stops after a few seconds.

 

Any ideas what it might be?

 

Sorry if it's been answered before, I tried searching and came up empty. Also, noises are hard for me to describe, I hope I'm making sense.

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Under deceleration I seem to be getting a loudish rhythmic clanking noise from the engine. One friend who saw it said it sounded like hydraulic lifters making noise and that it could be from low oil pressure. I have an N42 head and I'm fairly certain it has solid lifters though. I don't have an oil pressure gauge hooked up at the moment, but I will by the next autocross (car is not street legal). The noise always stops after a few seconds.

 

Any ideas what it might be?

 

Sorry if it's been answered before, I tried searching and came up empty. Also, noises are hard for me to describe, I hope I'm making sense.

 

Oil starvation as the oil in the pan sloshes forward. Overfill by 1/2 quart and see if it goes away. if not, pull the pan and check the pickup. While the pan is off, add a lateral baffle and a lip off the shallow part covering the front part of the sump.

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Oil starvation as the oil in the pan sloshes forward.

Ok, that's what we were thinking.

 

Overfill by 1/2 quart and see if it goes away. if not, pull the pan and check the pickup. While the pan is off, add a lateral baffle and a lip off the shallow part covering the front part of the sump.

Thanks for that suggestion. Adding half a quart is exactly the kind of thing I was hoping would work. I'll try it out and get that gauge hooked up. Hopefully I won't have to resort to adding baffles.

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