Subaru/Prodrive Exhaust... Proper leak tests
Discussion
Hi
I have a small issue with emissions.
I am led to believe there may be an air leak in the exhaust. It's the only thing I can think of left to check/change.
Can anyone recommend a garage who can actually test this. So far, the best I have managed is "It's just a loud car innit mate." Not a surprise with the prodrive exhaust. But sadly, not enough for me to think they actually checked properly.
I suspect we are looking for a pinhead sized hole, so looking at it, may not yield any results.
Any advice is appreciated. thanks
I have a small issue with emissions.
I am led to believe there may be an air leak in the exhaust. It's the only thing I can think of left to check/change.
Can anyone recommend a garage who can actually test this. So far, the best I have managed is "It's just a loud car innit mate." Not a surprise with the prodrive exhaust. But sadly, not enough for me to think they actually checked properly.
I suspect we are looking for a pinhead sized hole, so looking at it, may not yield any results.
Any advice is appreciated. thanks
Make up a mixture of soapy water using washing up liquid then just smear over the suspect area. If there's a leak no matter how small it will blow a bubble(s).
NB Same technique is used to find slow punctures/badly sealed rims on tyres, failed seals in split rim wheels, boost leaks in in pipework etc :-)
NB Same technique is used to find slow punctures/badly sealed rims on tyres, failed seals in split rim wheels, boost leaks in in pipework etc :-)
348jeff said:
Make up a mixture of soapy water using washing up liquid then just smear over the suspect area. If there's a leak no matter how small it will blow a bubble(s).
NB Same technique is used to find slow punctures/badly sealed rims on tyres, failed seals in split rim wheels, boost leaks in in pipework etc :-)
So simple. I'll give it a go. cheers mateNB Same technique is used to find slow punctures/badly sealed rims on tyres, failed seals in split rim wheels, boost leaks in in pipework etc :-)
Jazzy Jefferson said:
226bhp said:
I lol'edI wish you the best of luck spraying water onto a warm/hot exhaust.
If the system is leaking and the car is in the air on a lift it will be quite apparent where it is leaking due to the noise and (witness) soot marks, there is no need to do anything fancy.
If your tailpipe is on the silly large side then part of the problem can be scavanged air pulling back into the pipe and being picked up by the probe assuming the lambda reading is off. a way to test if this is the problem is to choke the tailpipe with a rag or something and see if the reading drops into range,if it doeas you need to find somewhere with a long probe...
Athlon said:
If your tailpipe is on the silly large side then part of the problem can be scavanged air pulling back into the pipe and being picked up by the probe assuming the lambda reading is off. a way to test if this is the problem is to choke the tailpipe with a rag or something and see if the reading drops into range,if it doeas you need to find somewhere with a long probe...
It's large but not that large. 2.5'' diameter i think. We did try your suggestion, but sadly to no avail.Thanks everyone for the help so far. I'll keep you posted...
Edited by Jazzy Jefferson on Thursday 6th November 13:59
If the leak isn't obvious then it won't be significant enough to be causing emissions problems.
Usually just holding a rag over the tailpipe will make the leak hiss if its slight. Its also unusual to not have any soot marks where it is leaking.
If you are clutching at straws then Cataclean is a good product, I have first hand experience of this stuff bringing a borderline emissions fail within spec. Eurocarparts have it on offer at £13.99 a bottle at the moment too.
Usually just holding a rag over the tailpipe will make the leak hiss if its slight. Its also unusual to not have any soot marks where it is leaking.
If you are clutching at straws then Cataclean is a good product, I have first hand experience of this stuff bringing a borderline emissions fail within spec. Eurocarparts have it on offer at £13.99 a bottle at the moment too.
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