CB750K3 Oil pressure steadily incresing over the past few months

[Luccondon]

1973 CB750 (less than 15,000 miles) PO was not good about upkeep at all...

Hi All,

I have noticed that my oil pressure has been steadily climbing over the past few months to the point where it is now over 100psi when I start the bike up.  After running for 15 mins it drops to maybe 60psi, but will still reach 100 when I am over 4,000rpm.

This has also coincided with a fairly small leak from the front of the engine between the 1st and 2nd headers, I am thinking that the two things may be linked?

I have replaced the filter and changed the oil twice in the past 3 months and it hasn't made a difference, so should I be dropping the oil pan to check out the condition of the screen?  Or is such a climb in pressure too big to just be caused by a slightly dirty screen?

I am a bit of a DIY'er, and have changed out my coils and done some other gasket replacement on the headers, but in terms of disassembling parts, I am kinda scared of messing something up.

Thanks in advance for any ideas!

[TOOLS1]

Oil leak would not cause it to climb in oil pressure. If the screen was clogged it would lose oil pressure. The only things I could think of would be the check valves in the oil pump, and the one in the oil filter mounting bolt. I would try "Seafoam" in the oil. This stuff will really clean it out and maybe free up a stuck check valve, if that is what it is.
TOOLS

[Luccondon]

Thanks TOOLS,

I was more thinking that the leak could have come about because of the climb in pressure, causing some oil to push through the gaskets; possible?

I will give the Seafoam a try, is there an amount that I should be pouring in there?  

Thanks,

On Wed, Jun 7, 2017 at 1:14 PM, TOOLS1 [via Vintage and Classic Honda's] <[hidden email]> wrote:

Oil leak would not cause it to climb in oil pressure. If the screen was clogged it would lose oil pressure. The only things I could think of would be the check valves in the oil pump, and the one in the oil filter mounting bolt. I would try "Seafoam" in the oil. This stuff will really clean it out and maybe free up a stuck check valve, if that is what it is.
TOOLS

---

If you reply to this email, your message will be added to the discussion below:

http://vintage-and-classic-honda-s.456789.n3.nabble.com/CB750K3-Oil-pressure-steadily-incresing-over-the-past-few-months-tp4062360p4062361.html

To unsubscribe from CB750K3 Oil pressure steadily incresing over the past few months, click here.
NAML

--

[TOOLS1]

Just pour a can in the oil, and ride the bike 10-20 miles, and change the oil.
TOOLS

[Luccondon]

Will do, 

Thanks for the pointer and I will report back.

Thanks,

On Wed, Jun 7, 2017 at 3:15 PM, TOOLS1 [via Vintage and Classic Honda's] <[hidden email]> wrote:

Just pour a can in the oil, and ride the bike 10-20 miles, and change the oil.

TOOLS

---

If you reply to this email, your message will be added to the discussion below:

http://vintage-and-classic-honda-s.456789.n3.nabble.com/CB750K3-Oil-pressure-steadily-incresing-over-the-past-few-months-tp4062360p4062363.html

To unsubscribe from CB750K3 Oil pressure steadily incresing over the past few months, click here.
NAML

--