mdwatson Posted September 11, 2013 Share Posted September 11, 2013 Have a 86 with a 2.5L. Noticed recently that there is oil coming out of the distributor up top. The motor has been recently rebuilt and it has about 60-70lbs of oil pressure now according to the gauge. Could the oil pressure cause this or are there seals in the shaft that are bad? Link to comment Share on other sites More sharing options...
ParadiseMJ Posted September 11, 2013 Share Posted September 11, 2013 There is a small paper/fabric type seal...looks like a washer...for $2. Of course the difficult part is re-indexing the dizzy once you have it out. Not too bad, might take a couple stabs. Link to comment Share on other sites More sharing options...
mdwatson Posted September 11, 2013 Author Share Posted September 11, 2013 I've already replaced the seal at the block. The oil is leaking out at the top where the rotor and everything is. It's somehow making it's way up the shaft. Link to comment Share on other sites More sharing options...
onlyinajeep726 Posted September 11, 2013 Share Posted September 11, 2013 Time for a new distributor then... As far as I know, the dizzy assembly is not servicable/rebuildable. I'd find out why the oil pressure is high like that... Seems like a lot, but I could be wrong. Link to comment Share on other sites More sharing options...
mdwatson Posted September 11, 2013 Author Share Posted September 11, 2013 I was thinking new distributor too. Looked at the oil pressure coming home from work and I quoted a little to high. It was running at around 55-60. Link to comment Share on other sites More sharing options...
Alexia Posted September 12, 2013 Share Posted September 12, 2013 Excessive oil pressure may indicate a problem.In order of the typical issues: Clean the connector and contacts for the oil pressure sensor. Bad oil pressure sensor. Verify with a mechanical gauge if possible. Stuck oil pressure relief valve in the oil pump. Apparently a common issue on the 2.5L especially if it was not removed and cleaned during the rebuild. Broken piston ring allowing compression to pressurize the crank case. Though there would likely be more obvious issues. Link to comment Share on other sites More sharing options...
carnuck Posted September 12, 2013 Share Posted September 12, 2013 Sounds like the breather on the valve cover may be blocked off or plugged (Bad juju!) Link to comment Share on other sites More sharing options...
airspeed Posted September 12, 2013 Share Posted September 12, 2013 My 2.5 has always had high oil pressure. In a cold weather start it will go up to 80psi, normal operating pressure is ~ 50-60psi. I have a mechanical Stewart-Warner gauge as reference. I did my rebuild about 60k ago with a new oil pump, no oil leaks. I always worried about the cold weather oil pressure being so high but it runs good. It is tricky getting the distributor clocked to the right position. You would think it is the 3 o'clock position for #1 but it is more like 4-5 o'clock. Look at the position of your rotor before you pull it out. Link to comment Share on other sites More sharing options...
HOrnbrod Posted September 12, 2013 Share Posted September 12, 2013 There is a seal (o-ring) on the distributor shaft, p/n 33004595, about $6.00. To get to it you need to pull the distributor, then the drive gear, slide the shaft out, and replace the o-ring. When I rebuilt my spare distributor I replaced this seal. BUT, according to my parts manuals, this o-ring was not used until the 87 models. I think this may be just an error in the 81-86 parts manual since the 86/87 2.5's used the same distributor. Before springing for a new distributor, pull your old one and see if the o-ring is on the shaft. This may be all you need. Link to comment Share on other sites More sharing options...
mdwatson Posted September 13, 2013 Author Share Posted September 13, 2013 Thanks hornbrod and everyone else! I'm going to have another look at it tomorrow and see if it has that o-ring. Link to comment Share on other sites More sharing options...
carnuck Posted September 13, 2013 Share Posted September 13, 2013 I still say the breather is probably clogged. There shouldn't be that much pressure under there. Rev the motor (not real high. Just a bit) and take your oil cap off and see if it "pops" (careful it doesn't end up in the fan!) It's not supposed to. Link to comment Share on other sites More sharing options...
HOrnbrod Posted September 13, 2013 Share Posted September 13, 2013 If the "breather" was clogged, assuming carnuck is referring to the CCV orifice elbow in the rear valve cover, the first place oil would blow is into the air cleaner. I've always had high oil pressure too, about the same as airspeed referred to in a previous post, and don't have any leaks. Well, maybe a bit at the RMS, but don't we all. OP, check to see if your 86 distributor has the shaft o-ring seal first. I'm not sure the 86 2.5 dizzy has one, and am curious to know. Link to comment Share on other sites More sharing options...
mdwatson Posted September 16, 2013 Author Share Posted September 16, 2013 Hornbrod sorry to say I didn't take the shaft apart. When I pulled the distributor the hold down tab was broken too so I just put a new one in. I know for sure that it wasn't the original distributor anyway if that made a difference on the seal. Have no oil leaks now. Link to comment Share on other sites More sharing options...
HOrnbrod Posted September 16, 2013 Share Posted September 16, 2013 Well, it's the end result that matters. Good to hear you got 'er done. :thumbsup: Link to comment Share on other sites More sharing options...
carnuck Posted September 17, 2013 Share Posted September 17, 2013 I should have said breather and/or CCV. If even partially clogged the oil is forced out by the blowby gases until the motor is broken in. Link to comment Share on other sites More sharing options...
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