5.7 hemi runs but no engine vacuum

KThomas · 11-26-2013, 09:43 PM

Pull the valve covers and check for and replace the broken valve spring or springs is a very good place to start....

Doug Blackley · 11-27-2013, 08:47 PM

Quote:

Originally Posted by KThomas

Pull the valve covers and check for and replace the broken valve spring or springs is a very good place to start....

Yes it is, and trying to make it run with a broken spring can cause the blown intake. Also be sure to check for proper valve opening as the do still turn cams into axle shafts from time to time.

chris ok · 11-29-2013, 09:16 PM

I performed a compression test on all 8 cylinders
all 170-185. 170 was with dying battery. so they have valve spring and cam problems, yeesh.
truck sits outside now since. They do not want to pay for anything.
old junker 188k, roadside used car lot.
out of my hands now.

11-26-2013, 09:43 PM	#1
KThomas Member Join Date: Jul 2010 Posts: 127 Likes: 166 Liked 6 Times in 4 Posts	Re: 5.7 hemi runs but no engine vacuum Pull the valve covers and check for and replace the broken valve spring or springs is a very good place to start....

11-29-2013, 09:16 PM	#3
chris ok Senior Member Join Date: Jul 2002 Location: Long Island, New york Posts: 592 Likes: 131 Liked 46 Times in 29 Posts	Re: 5.7 hemi runs but no engine vacuum I performed a compression test on all 8 cylinders all 170-185. 170 was with dying battery. so they have valve spring and cam problems, yeesh. truck sits outside now since. They do not want to pay for anything. old junker 188k, roadside used car lot. out of my hands now.