Weird BLUP BLUP BLUP noise on start sometimes... is this normal?
#1
Weird BLUP BLUP BLUP noise on start sometimes... is this normal?
Hey,
My car makes noises when it starts up. When it's cold, there's a brief rattle as the chain tensioners pump up. I've gotten used to that one. Various motors and pumps kick on in the dash, in the engine compartment, etc., and sometimes run a little while after shutdown. I've gotten used to that.
There's one noise that I have not gotten used to, that it only makes SOMEtimes with no discernable pattern, on startup: sometimes there is a BLUP BUP BLUP, or perhaps a POP POP POP, noise that comes from the right rear fenderwell. It stops right after I start to drive, or if it's let to idle a minute or so.
Now that I've changed my oil, I realize the oil tank is in that fender. I am postulating that there's some air bubbles in there sometimes (why? how?) in the tank and when the oil pump starts up, they get shaken loose and rise to the top of the tank and burble away in there.
Cause for concern? Anybody else's car do this? Just another idiosyncrasy about these cars in general or something unique, and uniquely concerning?
thanks in advance.
Thaddeus
My car makes noises when it starts up. When it's cold, there's a brief rattle as the chain tensioners pump up. I've gotten used to that one. Various motors and pumps kick on in the dash, in the engine compartment, etc., and sometimes run a little while after shutdown. I've gotten used to that.
There's one noise that I have not gotten used to, that it only makes SOMEtimes with no discernable pattern, on startup: sometimes there is a BLUP BUP BLUP, or perhaps a POP POP POP, noise that comes from the right rear fenderwell. It stops right after I start to drive, or if it's let to idle a minute or so.
Now that I've changed my oil, I realize the oil tank is in that fender. I am postulating that there's some air bubbles in there sometimes (why? how?) in the tank and when the oil pump starts up, they get shaken loose and rise to the top of the tank and burble away in there.
Cause for concern? Anybody else's car do this? Just another idiosyncrasy about these cars in general or something unique, and uniquely concerning?
thanks in advance.
Thaddeus
#2
I hear like 4 bubble sounds when I start the car each morning. It is only like 4-5 bubble sounds and I took it to be the oil. I am not sure what it is though. I am curious to read what others post.
#5
Originally Posted by ed devinney
Yep, it's the oil. You can hear it running through the pipes on the RH side.
I was hoping the rattle on start would stop with the new oil but hasn't... I guess I may have to replace that tensioner on the right side before the low temps come and snow flies again...
Exotic cars on a beer budget: never a dull moment.
#7
Originally Posted by Thaddeus
Hey,
My car makes noises when it starts up. When it's cold, there's a brief rattle as the chain tensioners pump up. I've gotten used to that one. Various motors and pumps kick on in the dash, in the engine compartment, etc., and sometimes run a little while after shutdown. I've gotten used to that.
There's one noise that I have not gotten used to, that it only makes SOMEtimes with no discernable pattern, on startup: sometimes there is a BLUP BUP BLUP, or perhaps a POP POP POP, noise that comes from the right rear fenderwell. It stops right after I start to drive, or if it's let to idle a minute or so.
Now that I've changed my oil, I realize the oil tank is in that fender. I am postulating that there's some air bubbles in there sometimes (why? how?) in the tank and when the oil pump starts up, they get shaken loose and rise to the top of the tank and burble away in there.
Cause for concern? Anybody else's car do this? Just another idiosyncrasy about these cars in general or something unique, and uniquely concerning?
thanks in advance.
Thaddeus
My car makes noises when it starts up. When it's cold, there's a brief rattle as the chain tensioners pump up. I've gotten used to that one. Various motors and pumps kick on in the dash, in the engine compartment, etc., and sometimes run a little while after shutdown. I've gotten used to that.
There's one noise that I have not gotten used to, that it only makes SOMEtimes with no discernable pattern, on startup: sometimes there is a BLUP BUP BLUP, or perhaps a POP POP POP, noise that comes from the right rear fenderwell. It stops right after I start to drive, or if it's let to idle a minute or so.
Now that I've changed my oil, I realize the oil tank is in that fender. I am postulating that there's some air bubbles in there sometimes (why? how?) in the tank and when the oil pump starts up, they get shaken loose and rise to the top of the tank and burble away in there.
Cause for concern? Anybody else's car do this? Just another idiosyncrasy about these cars in general or something unique, and uniquely concerning?
thanks in advance.
Thaddeus
Its just your Pride and Joy gargling on Mobil 1 on first start up ,a bit like mouth wash
Trending Topics
#8
I did not think there was any flow in the right side oil lines ( to the front heat exchanger) until the oil was hot enough to open the reservoir thermostat ... for the gurgling flow in these lines can be heard at idle when the oil is up to temp. Maybe there is a brief 'shock wave' of pressurized cold oil in the return line from the engine that lifts the T-stat valve briefly on start-up ???
#9
Originally Posted by Garth S
Maybe there is a brief 'shock wave' of pressurized cold oil in the return line from the engine that lifts the T-stat valve briefly on start-up ???
I've never had a car that has been able to throw me into 'red alert' status so easily, or so often. Sigh...
#10
Come on guys - its a dry sump system. When the engine stops the oil drains into the sump - gravity will do this!
When you start the car the oil pump sucks up the oil in the sump and sends it to the header tank in the top right hand of the rear wing.
Then as you drive off the oil is pumped around the engine - keeping the sump dry and the header tank empty.
That's why you check the oil only when you have run the car for twenty minutes and check it with the engine running - the oil is pumped up to the tank at tickover speed - emptying the sump and filling the header tank.
When you start the car the oil pump sucks up the oil in the sump and sends it to the header tank in the top right hand of the rear wing.
Then as you drive off the oil is pumped around the engine - keeping the sump dry and the header tank empty.
That's why you check the oil only when you have run the car for twenty minutes and check it with the engine running - the oil is pumped up to the tank at tickover speed - emptying the sump and filling the header tank.
#11
There was something about this in the Tech Q&A section in one of the recent issues of Excellence. I think I recall they said it has something to do with one of the oil filters.
I heard it all winter and then changed my oil and haven't heard it since. Don't know if it went away because of a new oil filter or because the weather warmed up.
I heard it all winter and then changed my oil and haven't heard it since. Don't know if it went away because of a new oil filter or because the weather warmed up.