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Arcticyam
Twinstar
Joined: Nov 26, 2017
Posts: 88
Location: UK
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Posted:
Mon Nov 27, 2017 12:01 am |
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Hello,
New to the forum and new to bike building so I'm excited!
I had a search but couldn't find the answer I'm after. Noob question alert:
I've been scrubbing the engine of my newly acquired 1979 CB750k for 3 days now with less than satisfactory results so I'm leaning towards getting it soda/media blasted, especially after seeing so many photos of great looking engines.
I've never dismantled an engine before so I'm looking for insight into how big a task it is to take it apart to be treated.
Will I have to completely dismantle the engine including camshaft, pistons, valves etc or can it be done keeping 'sections' together?
Time isn't really an issue but I'm concerned about opening a can of worms and creating problems for myself, bearing in mind my lack of experience and the fact that the engine was running.
On the other hand it could be a learning curve and a chance to service the engine.
Any advice is much appreciated! |
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metalganz
Black CB750F
Joined: Jul 31, 2009
Posts: 989
Location: Zwolle Holland
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Posted:
Mon Nov 27, 2017 9:43 am |
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Hello,you have to make choice if you want to clean and paint the engine or also take it apart for servicework.
I would say if the engine is running okay and compression is okay,chains etc okay why would you take it apart?
Anyway it`s not a big deal to take the engine out of the frame for blasting with soda or dry ice.
Imediately after preperation you can paint it with the proper paint.
Cheers,
Wim |
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Arcticyam
Twinstar
Joined: Nov 26, 2017
Posts: 88
Location: UK
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Posted:
Mon Nov 27, 2017 12:27 pm |
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Thanks. I wasn't sure how much of a risk it would be to blast and paint the engine while it is fully assembled.
I've also read about mixed reviews about soda blasting so I'm tempted to go the whole hog and bead/sandblast it. |
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smurdoch
CB1100F
Joined: Jan 22, 2004
Posts: 3164
Location: St. Catharines, Ontario
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Posted:
Mon Nov 27, 2017 1:39 pm |
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tomk1960
Red CB1100F
Joined: Nov 13, 2009
Posts: 5045
Location: Worcester, MA
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Posted:
Mon Nov 27, 2017 1:48 pm |
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Arcticyam wrote: |
Thanks. I wasn't sure how much of a risk it would be to blast and paint the engine while it is fully assembled.
I've also read about mixed reviews about soda blasting so I'm tempted to go the whole hog and bead/sandblast it. |
I blocked off the intake and exhaust openings on my son's 1100F engine and soda blasted it while it was completely intact. If you do some degreasing first and then take your time, you'll be surprised at how clean it will come out just by soda blasting. I wouldn't sand or bead blast an assembled engine and even apart is risky for media getting left behind. After soda blasting, pressure wash it with full strength purple power (or something similar) and an engine cleaning gun like this: https://www.harborfreight.com/engine-cleaning-gun-68290.html. Rinse off, blow dry with compressed air and let it sit for a couple of days. If you can put it on an engine stand like many of us have, you'll be able to paint the entire thing top to bottom. A good two part high temp ceramic paint will give you good results. There are numerous other great high temp paints out there, such as VHT. |
_________________ www.tomscyclerecycling.com
Powder coating services, specializing in all F components as well as brake system restoration.
Dealer for Galfer, Spiegler, Apex, APE, 4-into-1, KOSO, Venhill, ProBoltUSA, and Cometic.
CB1100F's - multiple flavors |
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swiftnick
Black CB900F
Joined: Sep 01, 2006
Posts: 1688
Location: Farmington Hills, MI
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Posted:
Mon Nov 27, 2017 7:37 pm |
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I have used purple power, a stiff bristle brush and a pressure washer to prep an assembled engine for paint. Plug the inlet and exhaust first of course. Then I took off the various covers (clutch, alt, starter, cam etc) and refinished them speratly. The end result was pretty sweet without needing to strip the motor. |
_________________ 1982 CB900FC (UK Version) 1 owner
1983 CB1100RD (Fastest, red and blue)
1975 CB400 four
2012 ST1300
1982 CX500 Turbo
1991 FJ1200
1976 CB750 Super Sport
1986 VFR750F
1985 VF1000R |
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Arcticyam
Twinstar
Joined: Nov 26, 2017
Posts: 88
Location: UK
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Posted:
Mon Nov 27, 2017 7:47 pm |
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Thanks gents! Are there any specific bungs you use to block of the inlets and exhausts or just paper/rag and tape? |
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metalganz
Black CB750F
Joined: Jul 31, 2009
Posts: 989
Location: Zwolle Holland
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Posted:
Tue Nov 28, 2017 10:56 am |
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Like Tomk says don`t sandblast it you end up in tears. |
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krgood0
CB1100F
Joined: Jun 18, 2006
Posts: 2511
Location: UK
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Posted:
Tue Nov 28, 2017 3:18 pm |
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metalganz wrote: |
Like Tomk says don`t sandblast it you end up in tears. |
Yes this is a cover i removed from an engine i stripped the other day that was blasted and supposedly properly sealed up
[img][/img] |
_________________ 1982 CB1100RC
1982 CB1100RC
1983 CB1100F/R rep
1981 CB985
2006 CBR600F
1979 Honda CBX1000 |
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swiftnick
Black CB900F
Joined: Sep 01, 2006
Posts: 1688
Location: Farmington Hills, MI
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Posted:
Tue Nov 28, 2017 5:39 pm |
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Arcticyam wrote: |
Thanks gents! Are there any specific bungs you use to block of the inlets and exhausts or just paper/rag and tape? |
Yup I used balled up rags then covered over in plastic and zip tied on. Need to keep out the pressure washer. |
_________________ 1982 CB900FC (UK Version) 1 owner
1983 CB1100RD (Fastest, red and blue)
1975 CB400 four
2012 ST1300
1982 CX500 Turbo
1991 FJ1200
1976 CB750 Super Sport
1986 VFR750F
1985 VF1000R |
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Stueecat
Hawk
Joined: Aug 17, 2013
Posts: 302
Location: Devon. UK
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Posted:
Tue Nov 28, 2017 5:47 pm |
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krgood0 wrote: |
metalganz wrote: |
Like Tomk says don`t sandblast it you end up in tears. |
Yes this is a cover i removed from an engine i stripped the other day that was blasted and supposedly properly sealed up
[img][/img] |
and that's just the ignition cover, what horrors are lurking in the sump? |
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Arcticyam
Twinstar
Joined: Nov 26, 2017
Posts: 88
Location: UK
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Posted:
Tue Nov 28, 2017 5:58 pm |
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Stueecat wrote: |
krgood0 wrote: |
metalganz wrote: |
Like Tomk says don`t sandblast it you end up in tears. |
Yes this is a cover i removed from an engine i stripped the other day that was blasted and supposedly properly sealed up
[img][/img] |
and that's just the ignition cover, what horrors are lurking in the sump? |
Do you mean that was blasted fully assembled or fully stripped down? |
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krgood0
CB1100F
Joined: Jun 18, 2006
Posts: 2511
Location: UK
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Posted:
Tue Nov 28, 2017 6:57 pm |
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Arcticyam wrote: |
Stueecat wrote: |
krgood0 wrote: |
metalganz wrote: |
Like Tomk says don`t sandblast it you end up in tears. |
Yes this is a cover i removed from an engine i stripped the other day that was blasted and supposedly properly sealed up
[img][/img] |
and that's just the ignition cover, what horrors are lurking in the sump? |
Do you mean that was blasted fully assembled or fully stripped down? |
Fully assembled |
_________________ 1982 CB1100RC
1982 CB1100RC
1983 CB1100F/R rep
1981 CB985
2006 CBR600F
1979 Honda CBX1000 |
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