jerryfreak wrote:
well, my mechanic used the original intake manifold from the 82 since the 84 had EGR and we didnt have all the parts for it. said we were missing a vacuum valve and some other parts and reasoned that no egr would be a simpler system with more power anyway
He should not have done that. Your mechanic maybe great, and honest, and trustworthy and all that. But he is apparently not familiar enough with this vehicle.
jerryfreak wrote:
worth noting:
when i had the draft tube plugged, that engine was pressurized after running for 10 minutes. like hissing and had pushed oil up the dipstick and out of every other orifice it could find. My mechanic suggested that this could be indicative of excessive blowby in the engine. i will say it was a tight seal i had on the vent
Again, your mechanic does not know enough about this engine. That is absolutely wrong. Even if you had ZERO blowby, your vacuum pump would pressurize the crankcase somewhat.
jerryfreak wrote:
given this situation, would putting an valve-cover style oil breather on there at least simulate the old drip draft tube and prevent oil all over my engine compartment? or should i just anticipate a lot of oil and run it to the ground like the old system?
Given this situation, I would replace the mechanic. You need to use the original parts from the '84. I have serious doubts that it has an EGR, based on the other stuff he said. Is this engine from a California-spec vehicle? If not, it has no EGR system.
I have an '86 engine on a skid in my garage. It's practically identical to the '84. I'll snap a photo or two of the top end, so you can see what parts you're missing.
Jack
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'83 Isuzu P'up Diesel LS - Original Owner
JoeIsuzu@IsuzuPup.comIsuzuPup.com