B16 turbo snapped oil squirters


C

Craig87

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Sep 23, 2014
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Evening all, long time lurker and 1st time poster.

Been building a b16 turbo for Time Attack over the last two years running a b16 forged engine that I just have t had much luck on.

After it spinning a bearing at Rockingham I set to rebuild it myself, and took my time and researched lots. Finally rebuilt and installed and ready for mapping and making around 300bhp (with lots of room for more) there was an issue with vtec oil pressure.

Checked all the usual culprits and nothing so yesterday decided to take oil pan off inspect oil and look at head to see if there is a blockage and I've found an oil squirter snapped and one bent.

My questions are; 1. Could this be the issue with vtec oil pressure as the snapped squirter is now effectively open and letting pressure out.

2. Is it engine rebuild time again? Is there a high chance that oil squirter has done bearing damage or engine damage?
 
What Pistons are you using?
Some Pistons need te oil squirters bending for clearance, although I thought this was mainly on b18s but obviously not....

The squirters themselves are open all the time anyway but I'm not sure if the bolts have a valve in them or not.

I think you'd be unlucky to have damaged a bearing with only one snapped oil squirter. Maybe a small amount of piston damage from impact.
 
Pretty sure the weisco pistons and eagle rods, going to strip it down to take a look but be if some real unlucky streaks with this car and this engine was freshly built absolutely everything so very annoying. I span the crank and there didn't seem to be clearance issues which is annoying
 
The wisecos require 0.30" clearance for the oil squirters.
You say you built it yourself? Does state clearly on the paperwork with the Pistons.
I've also had my fair share of bad luck on the engines front. Rebuilt mine 3x this year.
Finally got it right I think!
 
The first guy who built my engine would have been graced with instructions, after that spun a bearing I rebuilt it so instructions were a luxury! Maybe not gapped enough then. Annoying.

More annoying is the vtec issue also, no oil getting to the solenoid
 
No the filter mesh gummed up with sealer/Honda bond or something is it?
I've heard of that before, the head getting next to no pressure and it being a blockage by sealer.
 
You have a pressure gauge?
 
Yup. Standard oil pressure good with 20-22psi idle. 70psi at revs. Put pressure gauge on vtec port on dyno and consistently around 5psi didn't move from there!
 
Have you pulled the solenoid off and cleaned it up etc
I'll bet you've got something stuck in the oil gallery for it.
 
Solenoid off and cleaned, air pressure applied to see if pins lock and they do so no bent pins etc. It seems to point to a blockage in the oil gallery going to the solenoid. Has anyone got a drawing of the specific gallery feeding it?
 
On the back of the head behind the distributor to the side of the inlet manifold there is a 1/2" bsp thread (I think) Allen bolt.

I'm sure oil flow passes this point so it's worth getting a adaptor and checking pressure here.
 
If your taking the whole thing apart just strip the head aswell.
I squirted broke cleaner through all my little galleries until it ran out clear.
This or compressed air should work for you also,.
 
Was the squirter a clean break? Or did it get smashed up in to bits?

If it's a clean break then I would just remove the head and pull the Pistons that have made contact out to check for damage to start with and work from there, if there's ever any doubt though rip it all to bits for cleaning.

It's probable that the squirter could be blowing out the oil that's intended for the head,

You need to check your cam bearings carefully as well in case the head has been starved of pressure
 
The squirters themselves are always open(just a tube) I'm not sure if the bolts that hold them in have a valve of some sort in them but this shouldn't be effected by a broken squirter.?
 
jesse888 said:
The squirters themselves are always open(just a tube) I'm not sure if the bolts that hold them in have a valve of some sort in them but this shouldn't be effected by a broken squirter.?
Click to expand...
That's a good point actually, the hole in the end of the squirter is likely the same size as it is through out the tube and bolt that feeds it.
It probably wouldn't make a difference.


Going back to the original question are you using a early style vtec solenoid and took the pressure reading from the port that feeds the vtec oil pressure switch?



If so then you could be barking up the wrong tree.
That port will only read full pressure when the solenoid valve on top has pushed down on the part labeled vtec valve. You need to check the operation of the solenoid it self if you have not already.

I knew a guy that tee'd his pressure gauge in that port once and wondered why it didn't read properly
 
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The tube does narrow slightly as it reaches the end but in not sure it'll make that much of a difference tbh.
 
jesse888 said:
The squirters themselves are always open(just a tube) I'm not sure if the bolts that hold them in have a valve of some sort in them but this shouldn't be effected by a broken squirter.?
Click to expand...

I think there is a valve in them. Pretty sure ive seen some sort of ball valve in there. Would need to check the b16 manual though just to be sure.
 
Yeah possibly within the bolt, 100% the squirter themselves are open.
Come to think of it I don't remember the bolts having a clear pathway for the oil to travel when I cleaned them so likely is.
 
Wouldn't worry too much about the oil squirter been broke, there is a "restrictor" built into the bolt so wouldn't make any odds to oil pressure if tip broke off. Ultimately oil pressure to the head is limited by the restrictor in block so if your not losing pressure in the head somewhere and there is good oil pressure in the bottom end the issue most likely lies with the head oil feed restrictor located in top of block. Perhaps blocked with some debris.... Head will have to come off to check.
 
Try testing pressure here. To the best of my knowledge this port is for the main oil gallery in to the head.
 
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