Go Back   EcoModder Forum > EcoModding > Off-Topic Tech
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 03-25-2018, 04:47 PM   #1 (permalink)
Cyborg ECU
 
California98Civic's Avatar
 
Join Date: Mar 2011
Location: Coastal Southern California
Posts: 6,092

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 66.42 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
Thanks: 2,307
Thanked 2,022 Times in 1,380 Posts
Engine oil in coolant

Asking for pro-tips and pointers...

"Black and Green" has engine oil in its coolant reserve tank. It has been a minor phenomenon for a loooong time, but in the last year it seems to have become more significant. So, I am planning to replace my head gasket during my daughter's spring break.

This will be the first time I will ever have done this job.

I understand that when the head gasket fails, generally oil escapes into the coolant and not the other way around because the oil is under higher pressure.

I have not noticed white smoke from the tailpipe, indicating coolant in the combustion mix, but I also have not seriously checked (and can't right now).

How likely is it that I also have coolant in the engine? How would that happen and how might I check? And how should I check for damage when I get into the head?

Thx

__________________
See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.



  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 03-25-2018, 06:22 PM   #2 (permalink)
Master EcoModder
 
Join Date: Jun 2016
Location: WV
Posts: 1,165

IGL - '04 Saturn Ion
Team Saturn
90 day: 56.19 mpg (US)

grayOS (personal use) - '19 Mitsubishi Outlander Sport ES
90 day: 30.71 mpg (US)
Thanks: 55
Thanked 281 Times in 217 Posts
It would largely depend on where the gasket failure(if that’s the true fault) is... if it were between a large oil jacket and a small coolant jacket then there wouldn’t be a huge likelihood of coolant in the engine...

Best way to check is when the head is off to check for signs of water(rust or other deposits that aren’t carbon or oil)... while the head is off it wouldn’t be a horrible idea to have it magna-fluxed (check for cracking) and possibly shaved to correct any potential warping/pitting(a sign of water)

Has the engine developed a misfire of any kind? Have you checked compression?
__________________
My current Ecotec project...


My last Ecotec project...
  Reply With Quote
The Following User Says Thank You to 19bonestock88 For This Useful Post:
California98Civic (03-25-2018)
Old 03-25-2018, 06:32 PM   #3 (permalink)
(:
 
Frank Lee's Avatar
 
Join Date: Jan 2008
Location: up north
Posts: 12,737

Blue - '93 Ford Tempo
Last 3: 27.29 mpg (US)

F150 - '94 Ford F150 XLT 4x4
90 day: 18.5 mpg (US)

Sport Coupe - '92 Ford Tempo GL
Last 3: 69.62 mpg (US)

ShWing! - '82 honda gold wing Interstate
90 day: 33.65 mpg (US)

Moon Unit - '98 Mercury Sable LX Wagon
90 day: 21.24 mpg (US)
Thanks: 1,572
Thanked 3,508 Times in 2,195 Posts
"You got chocolate in my peanut butter!"
"You got peanut butter in my chocolate!"

If you see what looks like cappuccino froth on the dipstick or under the oil fill cap that could be coolant in the oil (or condensation from multiple short trips in sub-freezing temps).
__________________


  Reply With Quote
The Following User Says Thank You to Frank Lee For This Useful Post:
California98Civic (03-25-2018)
Old 03-25-2018, 06:40 PM   #4 (permalink)
Master EcoModder
 
Join Date: Jun 2016
Location: WV
Posts: 1,165

IGL - '04 Saturn Ion
Team Saturn
90 day: 56.19 mpg (US)

grayOS (personal use) - '19 Mitsubishi Outlander Sport ES
90 day: 30.71 mpg (US)
Thanks: 55
Thanked 281 Times in 217 Posts
I had totally missed that, I assumed you were referring to the combustion chambers and the like
__________________
My current Ecotec project...


My last Ecotec project...
  Reply With Quote
Old 03-25-2018, 06:49 PM   #5 (permalink)
Cyborg ECU
 
California98Civic's Avatar
 
Join Date: Mar 2011
Location: Coastal Southern California
Posts: 6,092

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 66.42 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
Thanks: 2,307
Thanked 2,022 Times in 1,380 Posts
Good suggestions. I'll ask around for places here that can look at the head and check it. That sounds like a good move.

Quote:
Originally Posted by 19bonestock88 View Post
... Has the engine developed a misfire of any kind? Have you checked compression?
No misfires. I checked compression two years ago, and it was really good for 250,000 miles. Stock being about 180 or 185, mine was still in the 170s. One cylinder was maybe 169, IIRC.

Quote:
Originally Posted by Frank Lee View Post
... if you see what looks like cappuccino froth on the dipstick or under the oil fill cap that could be coolant in the oil (or condensation from multiple short trips in sub-freezing temps).
Nothing like that. Oil blackens, but no "froth" or otherwise off color.
__________________
See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.



  Reply With Quote
Old 03-25-2018, 06:57 PM   #6 (permalink)
(:
 
Frank Lee's Avatar
 
Join Date: Jan 2008
Location: up north
Posts: 12,737

Blue - '93 Ford Tempo
Last 3: 27.29 mpg (US)

F150 - '94 Ford F150 XLT 4x4
90 day: 18.5 mpg (US)

Sport Coupe - '92 Ford Tempo GL
Last 3: 69.62 mpg (US)

ShWing! - '82 honda gold wing Interstate
90 day: 33.65 mpg (US)

Moon Unit - '98 Mercury Sable LX Wagon
90 day: 21.24 mpg (US)
Thanks: 1,572
Thanked 3,508 Times in 2,195 Posts
If a head gasket is leaking compression you might see bubbles in the coolant when the engine is idling.
__________________


  Reply With Quote
Old 03-26-2018, 04:10 AM   #7 (permalink)
Master EcoModder
 
Stubby79's Avatar
 
Join Date: Sep 2012
Location: Victoria, BC
Posts: 1,327

Firefly EV - '98 Pontiac Firefly EV
90 day: 107.65 mpg (US)

Little Boy Blue - '05 Toyota Echo
90 day: 33.35 mpg (US)

BlueZ - '19 Nissan 370Z Sport
90 day: 17.19 mpg (US)
Thanks: 43
Thanked 395 Times in 297 Posts
Could it be getting in there by other means? If you're not losing coolant (out the tail pipe) and not getting any water in with your oil, and it's not a significant amount either...might not be your head gasket?

If its engine oil, and it's only going one way, it would have to be oil under pressure...or it would go both ways or the other way. A crack or a leak somewhere between the oil pump and anything it supplies.

I assume you have a manual trans with those kind of MPG numbers...but if you didn't, it could be the oil cooling line for the trans in through the radiator. There any other possible routes of contamination that come to mind?
  Reply With Quote
The Following User Says Thank You to Stubby79 For This Useful Post:
California98Civic (03-27-2018)
Old 03-26-2018, 09:02 AM   #8 (permalink)
Master EcoModder
 
Join Date: May 2012
Location: Tampa, FL
Posts: 1,554

Volt, gas only - '12 Chevrolet Volt Premium
90 day: 38.02 mpg (US)

Volt, electric only - '12 Chevrolet Volt Premium
90 day: 132.26 mpg (US)

Yukon Denali Hybrid - '12 GMC Yukon Denali Hybrid
90 day: 21.48 mpg (US)
Thanks: 168
Thanked 343 Times in 238 Posts
Does that car have an integrated oil heater/cooler in the radiator?
__________________




  Reply With Quote
Old 03-26-2018, 08:41 PM   #9 (permalink)
Too many cars
 
Gasoline Fumes's Avatar
 
Join Date: Oct 2009
Location: New York State
Posts: 1,347

CRXFi - '88 Honda CRX XFi

Insight 256 - '00 Honda Insight
Team Honda
Gen-1 Insights

Insight 5342 - '00 Honda Insight
Team Honda
Gen-1 Insights
90 day: 65.78 mpg (US)
Thanks: 833
Thanked 618 Times in 365 Posts
Quote:
Originally Posted by ksa8907 View Post
Does that car have an integrated oil heater/cooler in the radiator?
I've never seen that on a Honda, but some Hondas do have coolant-to-oil heat exchangers between the block and oil filter.
__________________

  Reply With Quote
Old 03-26-2018, 09:36 PM   #10 (permalink)
Ol' Skooler
 
jcp123's Avatar
 
Join Date: Jul 2009
Location: Tyler, TX
Posts: 1,166

Beater Echo - '00 Toyota Echo
90 day: 42.67 mpg (US)

Hondizzle - '97 Honda Civic DX
Team Honda
90 day: 46.51 mpg (US)
Thanks: 66
Thanked 196 Times in 167 Posts
Others have already covered what I was going to say.

While you're in there anyway, I know these have a 105k timing belt change interval. But it's a pain, might as well slap a new belt/water pump/tensioner on. And if you have the feeler gauges, adjust the valves when you're getting 'er back together.

__________________



'97 Honda Civic DX Coupe 5MT
'00 Echo - dead 2/17
'14 Chrysler Town + Country - the better half's car
'67 Mustang Convertible - gone 1/17
  Reply With Quote
The Following User Says Thank You to jcp123 For This Useful Post:
California98Civic (03-27-2018)
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com