No Question about the vacuum on my '99 3800. So do we just tear it down and inspect the parts? Is there a way to be sure about cracks in the manifold beyond visual inspection?

misterswizzo
25

Asked by misterswizzo Dec 17, 2012 at 11:29 AM about the 1999 Pontiac Bonneville 4 Dr SLE Sedan

Question type: Maintenance & Repair

Vacuum at oil filler
PCV is OK

3 Answers

John Saffrahn
20,865

There is a way to have both the heads and the intake tested to see what is leaking for sure but they will have to be removed. If you can't see anything visually once removed then having them tested will be a last resort.

TonytheWoodsman
1,305

Is it a strong vacuum? I would first try disconnecting hoses from the crank case one by one to see if that stops the vacuum. There has to be some vacuum to pull the piston blow-by gases back to the combustion chambers, to re-burn those gases.

John Saffrahn
20,865

Only one hose to the crank and that's the PCV and it runs to the intake hose. No manifold vacuum unless they changed something that has been working fine and efficient forever.

Your Answer

Add photo

Related Questions

Bonneville
Looking for a Used Bonneville in your area?
CarGurus has 737 nationwide Bonneville listings starting at $995.
ZIP:

Search Pontiac Bonneville Questions

Pontiac Bonneville Experts

#1 ticklemedaly
ticklemedaly
Reputation 270
#2 dandyoun
dandyoun
Reputation 260
#3 Lars Cats
Lars Cats
Reputation 230
View All

Related Models For Sale

Used Pontiac Grand Prix"
130 Great Deals out of 3,971 listings starting at $1,495
Used Chevrolet Impala"
1,309 Great Deals out of 57,906 listings starting at $1,200
Used Buick Regal"
138 Great Deals out of 8,109 listings starting at $988
Used Chevrolet Monte Carlo"
59 Great Deals out of 1,831 listings starting at $1,995
Used Buick Park Avenue"
20 Great Deals out of 572 listings starting at $999
Used Pontiac Grand Am"
37 Great Deals out of 1,850 listings starting at $750
Used Ford Mustang"
722 Great Deals out of 35,458 listings starting at $1,950
Used Pontiac Firebird"
16 Great Deals out of 644 listings starting at $2,995
Used Nissan Altima"
1,880 Great Deals out of 87,336 listings starting at $995
Used Honda Accord"
1,334 Great Deals out of 63,298 listings starting at $899
Used Chevrolet Malibu"
1,278 Great Deals out of 60,888 listings starting at $1,200

Used Cars For Sale

2005 Pontiac Bonneville For Sale
6 Great Deals out of 126 listings starting at $2,995
2004 Pontiac Bonneville For Sale
3 Great Deals out of 86 listings starting at $2,800
2003 Pontiac Bonneville For Sale
8 Great Deals out of 111 listings starting at $1,995
2002 Pontiac Bonneville For Sale
86 listings starting at $3,900
2001 Pontiac Bonneville For Sale
70 listings starting at $995