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Author Topic: Head Gasket Question  (Read 690 times)

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Offline Vintageguy

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Head Gasket Question
« on: September 19, 2020, 12:31:29 PM »
Have a 1978 CB750F with 9,000 miles. Have noticed a bit of dampness (oil?) on a few of the upper cooling fins in the past. Not like really wet or anything, just a bit of ashy dampness. Is this a sign that I may need a head gasket?  Thanks for all responses.
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Offline newday777

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Re: Head Gasket Question
« Reply #1 on: September 19, 2020, 12:50:19 PM »
More likely are the rubber dic pucks(6 of them) that cover the head bolts under the cam towers are leaking oil into the fin areas.
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Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline Vintageguy

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Re: Head Gasket Question
« Reply #2 on: September 19, 2020, 01:28:34 PM »
How does one go about fixing that? Thank you.
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Offline newday777

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Re: Head Gasket Question
« Reply #3 on: September 19, 2020, 01:47:17 PM »
Motor out.
Remove cam cover, cam and towers. It's in the repair manual.
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Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline newday777

  • Really Old Timer ...
  • *******
  • Posts: 5,266
  • Avatar is my 76 K6 in Colorado w/Cody on back 1980
Re: Head Gasket Question
« Reply #4 on: September 19, 2020, 01:50:49 PM »
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Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline claudio.fauni

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Re: Head Gasket Question
« Reply #5 on: September 19, 2020, 02:03:09 PM »
Quote from: Vintageguy on September 19, 2020, 12:31:29 PM
Have a 1978 CB750F with 9,000 miles. Have noticed a bit of dampness (oil?) on a few of the upper cooling fins in the past. Not like really wet or anything, just a bit of ashy dampness. Is this a sign that I may need a head gasket?  Thanks for all responses.
More probable the seals of oil Channel are gone

Inviato dal mio SM-A750FN utilizzando Tapatalk

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