Topic: Oil in intake Manifold (Read 31724 times)

d-rail · « **on:** March 17, 2009, 11:28:21 PM »

This is my buddies B16 which was suppose to be freshly rebuilt and the motor has about 4000 miles on it or so. I'm thinkin its a PCV problem but its been replaced twice already. Here's what we found when we pulled the head to replace the head gasket that had been leaking oil all over the front of the motor since he got it back from the rebuild.

Here's the inside of the intake through the throttle body

Here is what the runners look like

d-rail · « **Reply #1 on:** March 17, 2009, 11:50:07 PM »

As far as I know whenever Jimmy did the rebuild form him he did it all a factory spec. The head gasket didn't leak into the cylinders, the seals around them actually looked really good. I didn't dig around to much after getting it apart since I had little man with me.

widebody93 · « **Reply #2 on:** March 17, 2009, 11:54:43 PM »

So how was there oil on out side of block if the head gasket was Sealed ok? oil in water?

d-rail · « **Reply #3 on:** March 18, 2009, 12:00:02 AM »

The head gasket was sealed fine around the cylinders but was leaking all over the outside from the oil draining down from the head. Oil had no water in it but I ripped his ass for using Valvoline Conventional oil. That's some nasty smelling shit once it has a bunch of it burned inside the motor.

d-rail · « **Reply #4 on:** March 18, 2009, 12:00:29 AM »

JD WHERE YOU AT MAN?

widebody93 · « **Reply #5 on:** March 18, 2009, 12:06:44 AM »

So these are the symptoms.
Oil in cylinders from oil getting sucked from top of Valve cover port.
Oil only on out side of block but not in water jackets.
Combustion chambers looks to have a good seal from head gasket.

Sounds like head is fine but block it warped outside or cylinder walls are taller than rest of the deck.

ANYONE CONCUR?

d-rail · « **Reply #6 on:** March 18, 2009, 12:09:38 AM »

I'd say that part of the head gasket problem was the fact that their was not even a residue on the head bolts from where they should've been lubricated before installation for best stretching/seating after torqued.

bigdaddyvtec · « **Reply #7 on:** March 18, 2009, 01:10:59 AM »

Charge contamination

d-rail · « **Reply #8 on:** March 18, 2009, 01:21:50 AM »

It's an NA motor so in my thought thoughts the only "charge contamination" could be from that PCV valve not doing its job but I don't know. I wouldn't ask an NA question on here if it wasn't for the fact that JD asked me to and that I don't trust other places on their info.

d-rail · « **Reply #9 on:** March 18, 2009, 02:08:13 AM »

Been told blow by but it really blows my mind that it would be the case. The guy who did the motor is reputable around here and the guy who owns the car/motor is unlike US and follows the engine builders break in rules. Think we're going to replace the head gasket after getting the head milled for flatness then do a leak down. Shouldn't it show us if it's blow by?

BoostForLife · « **Reply #10 on:** March 18, 2009, 02:31:31 AM »

It will probably show blow-by if you're trying to single a piston out, but if all 4 are the same it won't tell you anything other than the gap might be too big.

d-rail · « **Reply #11 on:** March 18, 2009, 02:35:18 AM »

Quote from: BoostForLife on March 18, 2009, 02:31:31 AM

It will probably show blow-by if you're trying to single a piston out, but if all 4 are the same it won't tell you anything other than the gap might be too big.

I have a hard time going with the blow by theory because it was suppose to be done by Honda specs and for all 4 pistons to like like ass?...... I just don't know about it unless piston to wall clearance was to big and set to same clearances for all 4 pistons.

BoostForLife · « **Reply #12 on:** March 18, 2009, 02:46:28 AM »

time for an external catch can or hoses shooting this shit out to the ground.

d-rail · « **Reply #13 on:** March 18, 2009, 02:59:37 AM »

Quote from: BoostForLife on March 18, 2009, 02:46:28 AM

time for an external catch can or hoses shooting this shit out to the ground.

It's more or less a stock motor so I don't know why he'd need suck things. I'm gonna check some things out tomorrow and see what I can find. Blow by or PCV are the only things I can think of. We'll see what I find then...... I guess

chris · « **Reply #14 on:** March 18, 2009, 04:18:14 AM »

Did you guys compression test before pulling the head?

Joseph Davis · « **Reply #15 on:** March 18, 2009, 09:43:27 AM »

It was leaking oil from the headgasket before dissassembly, the head bolts were installed dry as they came out dry. Mister Durnil is leaving out a few precious factoids.

The white on the plug ground strap, white on the exhaust valves is from burned oil residue. The wet oil in the intake manifold to semi-burned gummy residue on the piston surfaces tells you everything else.

Quote from: widebody93 on March 17, 2009, 11:43:40 PM

Head gasket probably not seated since they are supposed to have a 50 or greater finish on them according to Golden Eagle. Thats why I went back with a Cometic.

Funny thing is Hondas are one of the few engines that manage to seal a MLS without a mirror finish on head and deck, and although greatly improved these days Cometic has a dubious product history. You scare me when you drop tech sometimes.

I think you need to check the baffle that should be in the way of raw oil droplets being sucked or blown into the PCV and/or intake tract.

d-rail · « **Reply #16 on:** March 18, 2009, 12:15:48 PM »

Yea Chris we did a compression test on it about a week ago. With a cold motor it was around 180 across the board.

d-rail · « **Reply #17 on:** March 18, 2009, 12:17:08 PM »

I'll check out the baffle tonight when i head that way.

Joseph Davis · « **Reply #18 on:** March 18, 2009, 02:48:26 PM »

That's a wierd thing for GE to tell you since they sell overbored OEM gaskets as a superior solution to Cometic.

widebody93 · « **Reply #19 on:** March 18, 2009, 03:30:47 PM »

They were talking about the finish of the decking

I knew that. . . .

The say guy were are talking about here that put this motor together is the same guy that sleeved and decked my motor.

Joseph Davis · « **Reply #20 on:** March 18, 2009, 06:24:11 PM »

Well, now we have proof that, when your engine comes apart, it isn't solely the fault of your blue dash.

d-rail · « **Reply #21 on:** March 18, 2009, 07:42:50 PM »

Quote from: Joseph Davis on March 18, 2009, 09:43:27 AM

I think you need to check the baffle that should be in the way of raw oil droplets being sucked or blown into the PCV and/or intake tract.

Well I checked the baffle and the PCV stuff out today and everything seemed to be in working order. $:-\$ Not sure what the problem is and it's starting to irritate me. Anymore ideas guys?

d-rail · « **Reply #22 on:** March 19, 2009, 10:21:59 PM »

Little help here. Think be might just be swapping out the short block or building it but he hasn't decided yet.

Joseph Davis · « **Reply #23 on:** March 19, 2009, 10:26:09 PM »

If there seem to be gaps in the thread, guys, that's because I deleted another Widebuddy/Fatdaddy pantywaist war.

Help a Daryl out...

widebody93 · « **Reply #24 on:** March 21, 2009, 12:30:38 AM »

Did this just fall off the face of the earth from a modification of the thread.,.....

Darly, call me, GOTS a idea to not just goin and replacing the long block that your suggesting

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Author Topic: Oil in intake Manifold (Read 31724 times)

BoostForLife

BoostForLife

chris