98 V70 non-turbo PCV system replacement

[98v70dad]

So here's my progress today. My wife had people over this morning so I didn't start working until 1:00 PM. I made a lot of progress....got the throttle body off. got all the necessary stuff disconnected, removed and loosened the intake manifold bolts, removed the dipstick tube, etc and then it got dark. So I called it quits for the day and went inside to clean the throttle body,

So...everything went according to plan EXCEPT I had one surprise. There is no flame trap in my car. Maybe someone removed it long ago. ...don't know. Anyhow, where the 5/8 heater hose terminates on the drivers side it goes into a plastic elbow about 4 inches in diameter near the mass airflow sensor. There is a restriction in the line that is 5/16 in diameter here instead of the flame trap.

What do you folks think I should do with this restriction, leave it alone or drill it out to a bigger diameter? It doesn't make a lot of sense to me to increase the hose diameter to 5/8 dia. with heater hose and then choke it down with a restriction to 5/16 dia. at one end.

If you encountered this situation on your car please tell me what you did with it and how well it worked.

[Ozark Lee]

There really isn't (shouldn't be anyway) that much flow so the smaller diameter works just fine.

...Lee

[98v70dad]

There really isn't (shouldn't be anyway) that much flow so the smaller diameter works just fine.

...Lee

Yeah, my natural inclination is to not mess around with it.

The hole size (restriction) is about the ID of the original hose, though. By leaving it alone about the only real benefits of using the 5/8ths hose is that its cheap and won't clog with crud or break like the original. The thought that the bigger hose dramatically increases flow (discussed in other threads) is incorrect if there is a significant restriction in the flow path.

I was surprised how much oily residue and crud was coating the internal surfaces on the drivers side of the PCV system. I expected it only to be in the end over by the oil trap. Nice and clean now.

[erikv11]

Did you clean out the hard pipe really well? It accumulates a *lot* of crud, that is the big (and only, really) reason to replace it. And because the hard pipes get brittle after a dozen or so years.

The setup you describe is the normal one, every NA has the small diameter orifice at the flame trap housing. The main/possible advantage a larger diameter hose, is that it will clog less easily (more slowly) over time.

[98v70dad]

Did you clean out the hard pipe really well? It accumulates a *lot* of crud, that is the big (and only, really) reason to replace it. And because the hard pipes get brittle after a dozen or so years.

The setup you describe is the normal one, every NA has the small diameter orifice at the flame trap housing. The main/possible advantage a larger diameter hose, is that it will clog less easily (more slowly) over time.

i'm going to replace the hard line with heater hose. The hard line and rubber elbows on the ends of the hard line is getting really hard/brittle so I want to put something in that I wont have to deal with it again for 5 years. The hard line is very crapped up and the vacuum line is completely clogged. Cleaning the parts I plan to reuse was so much trouble that i'd rather replace the hoses.

I found a molded heater hose with enough straight section and bends that I can cut, trim and splice it with one splice and it will perfectly match the shape of the original line. it was $9 at Autozone.

[98v70dad]

So today I tried to finish my project and as usual the dealer sold me an incorrect part. I have been buying parts from this dealership for 6 years and they never fail to get at least one part wrong. Actually they have never gotten it right for me. I wish I could do such a poor job and still collect a paycheck!

[Ozark Lee]

At least they didn't do what O'Reilly Auto Parts did to me last week. I went in to buy a torque converter and they couldn't tell me which one was correct even though I had all of the tag numbers off of the transmission along with the year, make and model - and this was for a Chevy Suburban. They told me to go home a Google it.

...Lee

[Matty Moo]

The wobble extensions are great--smoother more accurate application of torque than a swivel joint when you are tightening down bolts. They can not achieve as much angle but usually just enough.

http://www.harborfreight.com/9-pc-wobbl ... 67971.html
These are made in Taiwan and the quality is surprising. BTW, I don't work for H.F.

Their Pittsburgh Pro line is way better than Craftsman and still less money. I haven't had to warranty any of my Pittsburgh tools yet, but I've made several trips to Sears in the meantime.

Of course, their $3 socket set is crap..but that's non their Pro line stuff.

[98v70dad]

The wobble extensions are great--smoother more accurate application of torque than a swivel joint when you are tightening down bolts. They can not achieve as much angle but usually just enough.

http://www.harborfreight.com/9-pc-wobbl ... 67971.html
These are made in Taiwan and the quality is surprising. BTW, I don't work for H.F.

Their Pittsburgh Pro line is way better than Craftsman and still less money. I haven't had to warranty any of my Pittsburgh tools yet, but I've made several trips to Sears in the meantime.

Of course, their $3 socket set is crap..but that's non their Pro line stuff.

Well I bought my wobble extensions at Home Depot and got fewer than HF for the same cash but getting the manifold off was as easy as it gets. I removed the throttle body to clean it since it was filthy and all of the manifold bolts were easy to remove. The far left bottom one looks like it may be a little tough to get back on, though.

[98v70dad]

At least they didn't do what O'Reilly Auto Parts did to me last week. I went in to buy a torque converter and they couldn't tell me which one was correct even though I had all of the tag numbers off of the transmission along with the year, make and model - and this was for a Chevy Suburban. They told me to go home a Google it.

...Lee

This sort of thing seems to be more and more common. Today I went to the grocery store looking for something and after asking 3 different people I gave up. All of them gave me different variations of " it might be on aisle three but if it's not there look over by dairy and if you can't find it there look on aisle 5 ...blah blah blah. I went in to buy one thing and spent 20 minutes on a scavenger hunt and left without my item. Life was simpler before computers made it possible for anyone to get a job.