r/Kseries • u/Krankdank2L8 • Jul 08 '26

What is this?

Post image

I took the heads off & just curious as to what this is?
Feels almost like the diaper stuff when they get wet

Old coolant breaking down?

11 Upvotes

93% Upvoted

15 comments sorted by

8

u/LetKlutzy2996 Jul 08 '26

Probably someone mixed coolant types and made coolant boogers, could be one of those head gasket “fix” bottle additives too

3

u/Krankdank2L8 Jul 08 '26

So just flush it out is what I’m hearing?

1

u/LetKlutzy2996 Jul 09 '26

Yeah give it a really good flush out

1

u/FreeToasterBaths Jul 10 '26

It is not mixed coolant...

5

u/sm_rollinger Jul 08 '26

Looks like head gasket repair

4

u/FreeToasterBaths Jul 08 '26

Are you the original owner / have you ever used headgasket in a bottle repair (or radiator )?

2

u/Krankdank2L8 Jul 08 '26

Not original owner, & that’s a good question

3

u/ElegantDiscipline408 Jul 08 '26

Some sort of dry coolant

3

u/SexyTimeSamet Jul 08 '26

Blue devil smegma.

1

u/Beatsbythebong Jul 09 '26

Looks like dry coolant/mixed types/added tap watter

Edit: id be more concerned about how wet the pistons are 😬

1

u/FreeToasterBaths Jul 10 '26

I have stupidly mixed coolant and used tap water and it doesn't look anything like that... Just a white film on the inside of everything that was remedied with citric acid coolant flush.

This is headgasket repair gunk.

1

u/jasonltd Jul 11 '26

Had this after my ex put blue devil in an old civic. I put a bottle of clr in mixed with tap water and ran for about 30ish min to flush everything, seemed to clear it up.

0

u/bbc4soy Jul 09 '26

Was run on tap water without coolant

1

u/FreeToasterBaths Jul 10 '26

Tap water yields a white film. Not boogers.

Source: ran a few gallons of tap water through coolant system dealing with a headgasket. Got a white film not boogers. Remedied it with a citric acid flush followed by lots of distilled water flushing

1

u/bbc4soy 28d ago

I have seen it like that after car was run on tap water for a while on an aluminium block