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Old 05-14-2019, 07:00 PM   #1
gti2slow
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CRC GDI cleaner

I've used CRC GDI stuff as well as Seafoam annually using a spray nozzle through the IAT port. I have had good results when done on an engine at operating temperature and with a heatsoak. I have not saved any borescope shots after my last cleaning but this dudes video really is similar to my results (My buildup was not nearly as bad, I have no buildup as I clean every year)

https://www.youtube.com/watch?v=1_giqO78tLY

https://www.youtube.com/watch?v=48JSlXlvMC0

Thought I would share as this for anyone interested in what a chemical clean can do. It wont get the engine spotless but will melt off any of the chunky buildup.
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Old 05-15-2019, 04:21 AM   #2
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Do you actually see the valves afterwards? Many times the chem/spray stuff doesn’t totally work.
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Old 05-15-2019, 02:13 PM   #3
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I see more valve stem and guide just using 4 parts fuel to 1 part spirits or NAPHTHA...

before;


after:


...apologies for the cheap $10 bore-scope
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Old 05-16-2019, 08:44 PM   #4
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Quote:
Originally Posted by golfballer78 View Post
Do you actually see the valves afterwards? Many times the chem/spray stuff doesn’t totally work.
Yeah, it cleans up pretty good. the key is it needs done while the engine is warm to work.
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Old Yesterday, 01:19 PM   #5
UberDSG
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Quote:
Originally Posted by ROH ECHT View Post
I see more valve stem and guide just using 4 parts fuel to 1 part spirits or NAPHTHA...

before;


after:


...apologies for the cheap $10 bore-scope
any more info on the method? do you spray into the manifold as well or just in fuel tank?
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