Should I have a spring in a PCV?? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 09-11-2006, 01:01 AM   #1
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Default Should I have a spring in a PCV??

Over the weekend I change the UIM and LIM and noticed that the PCV did not have a spring

I got a 98 Bonneville, non SC with 155000K. Had issues with this engine since purchasing it in 2001. Thanks to this forum I was able to put to rest my engine issues from the past (UIM - Coolant leak). But know my engine is running slughish.

here are some syptoms:

1. At Idle, it revs to below 1000rpm. throttle up to 2500 and it sounds like gasping for air and when it settle back to idle it sometime backfires. This only happens when the A/C switch on.
2. When i turn off the a/c, It idles around 1100 and still sluggish but a little better. I am know hearing a hissing sound.
3. During driving conditions - when accel the car is hesitating and need to rev it up to 3000-4000rpm until this hesitation stops.
4. upon starting the car it takes time to crank the engine over and then their is (i believe) blue smoke.

I have spent allot of time and monies to get the engine back prior to the 2001 issues.

I reading all the threads its point to the PCV or EGR. So any help is appreciated.

Cheers
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Old 09-11-2006, 01:30 AM   #2
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No spring in the PCV valve. When you shake it, it should move inside. Hissing sound could mean a vacuum leak somewhere. Check all your lines from the back side of your intake to the firewall, and the lines from the front side of your intake to the canister below the air filter box.
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Old 09-11-2006, 08:49 AM   #3
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If you can not locate the vacuum leak. Spray throttle body cleaner around the engine slowly. When the engine acts differently concentrate on that area and you will locate your leak.
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Old 09-11-2006, 10:49 AM   #4
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Thanks for the quick response. Will try this tonight and let you know.
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Old 09-11-2006, 03:08 PM   #5
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Hold on a sec... there IS supposed to be a spring in the PCV assembly. For some reason there are a ton of people around here with no spring in the PCV, but if you get a brand new Delco PCV kit it will come with the valve, O-rings, and a new spring. As far as I'm concerned, it'* supposed to be there.
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Old 09-11-2006, 05:21 PM   #6
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I think the later years had a spring... But the 95-99'* most likely didn't...

Question tho.... Does this PCV cross to both the L36 and L67?

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Old 09-11-2006, 05:28 PM   #7
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1998 L36'* have the spring.
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Old 09-11-2006, 05:41 PM   #8
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Makes me wonder.... Did all of the MAP equipped L36'* have the spring? Hmmmmm 96 + maybe?

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Old 09-11-2006, 05:59 PM   #9
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Makes sense the way it'* put together.
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Old 09-11-2006, 06:01 PM   #10
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Thought I'd bring this up, but my dad'* friends' '96 Olds 88 L36 had a spring on the PCV.
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