Valve seal colors - LotusTalk - The Lotus Cars Community
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post #1 of 7 (permalink) Old 07-16-2017, 02:29 PM Thread Starter
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Valve seal colors

I bought a ported head + cams, had it looked at by a machinist, he did the valve seats and he mentioned replacing the valve seals which sounded good to me, and I told him to do that. Post install I have oil smoke enough for the tuner to reject my car. Car was fine before the head swap, so it would be pretty odd for the smoke to be anything unrelated to the head. I'm hoping at this point it's an issue with valve seals, not a gasket issue (head gasket was replaced, arp studs were installed...).

I just popped the valve cover and looked around with a $30 wifi borescope that talks to my phone, and I can see that the intake seals are orange, and the exhaust seals are blue (both sides have the little spring around them... I was looking to see if any of them seemed to have obviously been poorly seated, lost the little spring, whatever I might see)

Is this color difference normal for OEM parts? is it normal if the machinist just ordered seals of that "type" from somewhere (color code by size or temp resistance or something?)

2005 Lotus Elise, Starlight Black # 111 SSM NER SCCA Solo - 1835lbs up to 1.65 Lat [email protected]~55mph (asphalt) 193whp 142wtq Normally Aspirated.

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post #2 of 7 (permalink) Old 07-18-2017, 04:07 PM Thread Starter
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Ok found my own answer here... seems that the colors do differ at least in the kit sold by monkeywrench.... MWR Valve Stem Seals Kit ? Toyota 1ZZ 2ZZ | Monkeywrench Racing

2005 Lotus Elise, Starlight Black # 111 SSM NER SCCA Solo - 1835lbs up to 1.65 Lat [email protected]~55mph (asphalt) 193whp 142wtq Normally Aspirated.

http://www.the111shift.com/p/the-build.html

https://www.youtube.com/c/the111shift
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post #3 of 7 (permalink) Old 07-18-2017, 05:19 PM
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When/ under what circumstances does it smoke?

If mostly at start up, seals leaking oil into the cylinders while at rest is the typical cause.

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post #4 of 7 (permalink) Old 07-20-2017, 05:06 AM Thread Starter
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Not too bad on startup, but more with revs, and slightly more with let off (car is not streetable and has clam off, so I cant actually drive it around). Smoke is never heavy, but is visible, tuner won't touch it until smoke is gone (which is just fine of course).

Symptoms sounds a bit like one of two things... an oil ring, or some leak that only shows under vacuum at the valve seals... (i've talked to two folks who said they had the latter problem with these symptoms on other cars) Bottom end was fine before the head swap, so rings seem very unlikely unless I'm just particularly unlucky, and the ring went on startup after the headwork.

Compression varied a little across cyls but not bad, and as I said, it all worked fine before the head swap.

Adding the catch can to verify that it's not intake oil, and begin monitoring for blow by buildup in the catch can. Then probably next I'll have someone do the seals. If that doesn't do it, I'll need to invest in rings/rebuild.

At least that's my thinking at the moment....

2005 Lotus Elise, Starlight Black # 111 SSM NER SCCA Solo - 1835lbs up to 1.65 Lat [email protected]~55mph (asphalt) 193whp 142wtq Normally Aspirated.

http://www.the111shift.com/p/the-build.html

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post #5 of 7 (permalink) Old 07-20-2017, 08:46 AM
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Well, I don't believe in coincidence in these situations. Thinking it has something to do with the head.
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Driving Tips-https://www.lotustalk.com/forums/f100...art-1-a-49665/
Moss Emergency Line-https://www.lotustalk.com/forums/f100...cy-line-36631/
Safely Piercing Wires-https://www.lotustalk.com/forums/f129...esting-106438/
Bleeding Brakes- https://www.lotustalk.com/forums/f101...-brakes-241138
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post #6 of 7 (permalink) Old 07-21-2017, 06:36 AM Thread Starter
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Quote:
Originally Posted by glb View Post
Well, I don't believe in coincidence in these situations. Thinking it has something to do with the head.
Any other head related things I should check? Valve guides I suppose, but not sure how that would let oil in unless they were in terrible shape allowing the valve stem to wander enough to open a gap in the seals, which I hope the machinist should have spotted.

My impression is that head gasket sealing issues would be much more likely to involve antifreeze going places it shouldn't...

2005 Lotus Elise, Starlight Black # 111 SSM NER SCCA Solo - 1835lbs up to 1.65 Lat [email protected]~55mph (asphalt) 193whp 142wtq Normally Aspirated.

http://www.the111shift.com/p/the-build.html

https://www.youtube.com/c/the111shift
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post #7 of 7 (permalink) Old 07-21-2017, 08:35 AM
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I wish I knew, but don't.

But, same deal with valve guides as seals. I think you'd see the most smoke during start up.

You're a good BOE customer. Ask them for guidance.

05 elise (BOE Rev300 supercharged, SSRs, shift tower mods, Multivex; HID hi/low beams); 05 Corolla XRS

Driving Tips-https://www.lotustalk.com/forums/f100...art-1-a-49665/
Moss Emergency Line-https://www.lotustalk.com/forums/f100...cy-line-36631/
Safely Piercing Wires-https://www.lotustalk.com/forums/f129...esting-106438/
Bleeding Brakes- https://www.lotustalk.com/forums/f101...-brakes-241138
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