02 VVT oil pressure loss

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04-22-2015, 05:55 PM

#41

patsmx5

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Thanks Joe!

I looked at his engine build thread, and this post shows that piece is in fact installed in his block.

04-22-2015, 06:55 PM

#42

stigish

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Quote:

Originally Posted by patsmx5

Try something man!

ROFL

04-22-2015, 06:57 PM

#43

stigish

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I guess I could try 50w although 40w did nada. I'm trying another trick too.

04-22-2015, 07:00 PM

#44

stigish

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Quote:

Originally Posted by Joe Perez

That plug goes in the galley which feeds oil up from the block into the head. It's present in every Miata engine from 1990 through 2005, be it HLA, solid or VVT.

Thanks all, I didn't know what that was either, and thanks Pat for looking up the pic for me!

04-23-2015, 07:53 AM

#45

stigish

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I blocked the cam cover dumps with JB Weld and drilled to 1/16" which raised idle pressure ~5-8lb but max pressure still 40lb and not enough for VVT operation.

04-23-2015, 07:56 AM

#46

sixshooter

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VVT will not operate at 40lbs, huh? That's interesting.

04-23-2015, 08:00 AM

#47

stigish

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What do you infer from this?

04-23-2015, 09:32 AM

#48

sixshooter

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I would just assume that 40psi would be adequate to actuate the system. 40psi is within the parameters of what I would consider normal oil pressure.

04-23-2015, 09:39 AM

#49

Joe Perez

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Quote:

Originally Posted by sixshooter

I would just assume that 40psi would be adequate to actuate the system. 40psi is within the parameters of what I would consider normal oil pressure.

It's very slightly below the lower end of the spec (warm @ 3,000 is quoted as 43-56), however it should certainly be adequate to operator the VVT mechanism.

04-23-2015, 10:15 AM

#50

stigish

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The engine light comes on at ~2500-3000 & ~30-35lb. The VVT may function at higher rpm tho.

04-23-2015, 10:37 AM

#51

Joe Perez

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Quote:

Originally Posted by stigish

The engine light comes on at ~2500-3000 & ~30-35lb.

That seems reasonable.

(I assume that the CEL is for P0012.)

Just to double-check, you are using engine oil in your engine, and not Italian salad dressing, right?

04-23-2015, 11:30 AM

#52

stigish

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Quote:

Originally Posted by Joe Perez

That seems reasonable.

(I assume that the CEL is for P0012.)

Just to double-check, you are using engine oil in your engine, and not Italian salad dressing, right?

= >

Attached Thumbnails

02 VVT oil pressure loss-original_dressing.jpg

02 VVT oil pressure loss-k2-_607d5e9e-1015-490a-8d89-f3090f5284f0.v1.jpg

11-18-2015, 04:15 AM

#53

Itty

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Soo, did you ever figure this out? I'm going to look at a car this weekend with a P0012 but maybe I won't bother if it's this much of a pain in the ***.