SOHC.co.uk Forums > CB750
Engine full of fuel and seized up
K2-K6:
Yes, there's one for each side of the head.
Purpose is to restrict the oil flow to designed rate while maintaining pressure within crankshaft supply architecture, the cam area being low pressure as opposed to the crankshaft being high.
It's the nature of any restriction in flow that it will "collect" any stray particals (it's only fed filtered oil) resulting in impaired flow or blocking.
The risk here is to have detached and excess sealant pass onward up from gasket face and get stuck in those small restrictions.
It's your appreciation of this as to the decision you make, blocked they will certainly trash their onward valve train, of that there's no doubt.
I've used Hylomar spray as stated above (light spray of gasket and leave to dry) to leave a "selotape" quantity fine film on the gasket. This primarily on the F2 engine as they are very prone to oil seeping at the head gasket, this never with any problems.
I can see the other point or view and wouldn't argue with the logic, but know that many owners fret about any oil leak at all here at this juncture. It's highly unlikely to compromise the compression sealing of the engine (with no sealant applied) so not a worry from competent running perspective.
Of course if it does leak it's just that normally and not drastic, versus the other risks. But naturally it's engine out to correct.
Giving a clear picture hopefully will help
PJM47:
Ok thanks for the explanations. Makes sense. Probably safer to leave it dry.
Having had various old British bikes I’m not too concerned about oil leaks.
I will make sure those jets are clean before putting it back together.
Trigger:
These should not leak if the studs are sealed and the O'rings are up graded ;)
PJM47:
--- Quote from: Trigger on November 03, 2020, 02:20:42 PM ---These should not leak if the studs are sealed and the O'rings are up graded ;)
--- End quote ---
Are the o rings that come with the vesrah 156 any good? If not would you be able to point me at suitable upgraded ones please?
Nurse Julie:
--- Quote from: PJM47 on November 03, 2020, 06:37:08 PM ---
--- Quote from: Trigger on November 03, 2020, 02:20:42 PM ---These should not leak if the studs are sealed and the O'rings are up graded ;)
--- End quote ---
Are the o rings that come with the vesrah 156 any good? If not would you be able to point me at suitable upgraded ones please?
--- End quote ---
I have stock of all the upgraded O rings you need Paul. I will PM you after I've cooked dinner 😁😁😁
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