Head gasket leak repaired 8 month ago. Still high (25ppm) HC in th cooloing system?

[berkeleyman]

Hi, everyone

Pre-purchase check of the 99 Legacy showed high (20-25ppm) of
hydro-carbons in the cooling system. The mechanic advised it is a
beginning of head gasket leak; but the owner has a paperwork of the
replacement from Feb last year from dealership. He took it back to the
dealership and they claim not to detect any leak. Mechanic says it is
possible that high ppms are still from the old leak.
My questions:
1) Is it plausible that this is the case?
2) Any way to "clean" cooling system?

The car looks good otherwise but the gasket issue stops me from getting
it.

Thanks!!

 

[CiscoHeadsetAdapter.com]

First of all, you could flush the cooling system, put a new coolant, and
check hte hydro-carbons again. If you will have it - it's internal leak.

Second, you can use "Head gasket repair" system. In some cases it works
great. It will not hurt your engine - if it has a leak, anyhow you have to
repair it. So, why not to take a chance to try to do it "inexpensive way"
first.

I had an internal leak in my '97 Outback, and it was completely cured by the
"Head gasket repair" liquid. The process takes over 24 hours, but I got
another 25k after "repair" without any problem.

Good luck.