EVAP leak...BIG!

MDK · Post by **MDK** » 30 May 2018, 18:20

Hey everyone..MDK here. I have a 1998 XC70 ... early VIN ... that I am unwilling to depart with. I had a VW mechanic scan it and He say it has an evap leak ...a big one. He cleared the code but said it would return. I know about the gas cap but where else should I look ? Any input would be great... thanks again MVF

Post by **scot850** » 30 May 2018, 22:04

Check the pipes around the carbon canister which on your car I think is under the LH front fender behind the headlight.

Neil.

Post by **kranz** » 30 May 2018, 23:55

This is most likely the dreaded P0455 code. It is much discussed elsewhere in this forum if you do a bit of search. My 98 V70 suffers from this affliction, but now that I have received the Georgia Senior emissions exemption, I haven't put much effort into finding the source. This past month while replacing my rear brakes I stumbled on the likely cause by accident. One of the hoses connecting the rollover valve had a big hole in it. This is one of the more common causes and is worth checking along with the carbon canister.

Post by **RickHaleParker** » 31 May 2018, 00:25

Smoke test, blow smoke in the lines and see where it leaks out.

Post by **abscate** » 31 May 2018, 03:10

A big leak in context of the evap system is a hole bigger than 1 mm, so a single split in a hose will do it.

MDK · Post by **MDK** » 31 May 2018, 05:23

Thanks to everyone who responded to my leak... now I gotta figure out what a roll over valve is.... I checked the char. can.last night.. but I'll check it again. I wish I had a " smoker"... that thing is great no matter what model you drive.!! MDK

Post by **RickHaleParker** » 31 May 2018, 05:32

I wish I had a " smoker"

Google "DIY evap smoke machine", there are many ways to make one ... cheap.

You could puff on a Cigar and then blow.

Post by **abscate** » 31 May 2018, 11:33

Its harder than most of those videos make out. Burning oil with battery heating is a pretty easy way to start a fire. I found using a compressor, sage smudge sticks, clay pot - all stuff I had lying around, but all in would probably run $150-200

Post by **kranz** » 31 May 2018, 12:23

Personally, I'd carefully inspect the usual suspects that are enumerated in this forum. I'd only buy some cheap cigars and monkey with the smoke treatment if inspection offers no satisfaction.

Post by **abscate** » 31 May 2018, 13:47

I think about 90% of P0455 are cured with the J hose and canister shutoff hose replacement.