360 v8 Compression check
10-08-2006, 09:39 AM
#1
Guest
Posts: n/a
360 v8 Compression check
Any one got the specs for a compression check on a 360 v8 '91 ?
I'm only getting 8 bar (~ 115 psi) pretty consistently across all cylinders.
I would have expected about 140-160 psi and am a bit surprised it is so
consisently low. That was a dry test - didn't do a wet one.
Dave Milne, Scotland '91 Wagoneer
I'm only getting 8 bar (~ 115 psi) pretty consistently across all cylinders.
I would have expected about 140-160 psi and am a bit surprised it is so
consisently low. That was a dry test - didn't do a wet one.
Dave Milne, Scotland '91 Wagoneer
10-08-2006, 11:06 AM
#2
Guest
Posts: n/a
Re: 360 v8 Compression check
Dave,
The first thing you are looking for is uniformity across all cylinders,
which you have. I wouldn't worry.
Earle
"Dave Milne" <jeep@_removethisbit_milne.info> wrote in message
news:8c7Wg.31235$r61.2601@text.news.blueyonder.co. uk...
> Any one got the specs for a compression check on a 360 v8 '91 ?
>
> I'm only getting 8 bar (~ 115 psi) pretty consistently across all
cylinders.
> I would have expected about 140-160 psi and am a bit surprised it is so
> consisently low. That was a dry test - didn't do a wet one.
>
> Dave Milne, Scotland '91 Wagoneer
>
>
The first thing you are looking for is uniformity across all cylinders,
which you have. I wouldn't worry.
Earle
"Dave Milne" <jeep@_removethisbit_milne.info> wrote in message
news:8c7Wg.31235$r61.2601@text.news.blueyonder.co. uk...
> Any one got the specs for a compression check on a 360 v8 '91 ?
>
> I'm only getting 8 bar (~ 115 psi) pretty consistently across all
cylinders.
> I would have expected about 140-160 psi and am a bit surprised it is so
> consisently low. That was a dry test - didn't do a wet one.
>
> Dave Milne, Scotland '91 Wagoneer
>
>
10-08-2006, 11:06 AM
#3
Guest
Posts: n/a
Re: 360 v8 Compression check
Dave,
The first thing you are looking for is uniformity across all cylinders,
which you have. I wouldn't worry.
Earle
"Dave Milne" <jeep@_removethisbit_milne.info> wrote in message
news:8c7Wg.31235$r61.2601@text.news.blueyonder.co. uk...
> Any one got the specs for a compression check on a 360 v8 '91 ?
>
> I'm only getting 8 bar (~ 115 psi) pretty consistently across all
cylinders.
> I would have expected about 140-160 psi and am a bit surprised it is so
> consisently low. That was a dry test - didn't do a wet one.
>
> Dave Milne, Scotland '91 Wagoneer
>
>
The first thing you are looking for is uniformity across all cylinders,
which you have. I wouldn't worry.
Earle
"Dave Milne" <jeep@_removethisbit_milne.info> wrote in message
news:8c7Wg.31235$r61.2601@text.news.blueyonder.co. uk...
> Any one got the specs for a compression check on a 360 v8 '91 ?
>
> I'm only getting 8 bar (~ 115 psi) pretty consistently across all
cylinders.
> I would have expected about 140-160 psi and am a bit surprised it is so
> consisently low. That was a dry test - didn't do a wet one.
>
> Dave Milne, Scotland '91 Wagoneer
>
>
10-08-2006, 11:06 AM
#4
Guest
Posts: n/a
Re: 360 v8 Compression check
Dave,
The first thing you are looking for is uniformity across all cylinders,
which you have. I wouldn't worry.
Earle
"Dave Milne" <jeep@_removethisbit_milne.info> wrote in message
news:8c7Wg.31235$r61.2601@text.news.blueyonder.co. uk...
> Any one got the specs for a compression check on a 360 v8 '91 ?
>
> I'm only getting 8 bar (~ 115 psi) pretty consistently across all
cylinders.
> I would have expected about 140-160 psi and am a bit surprised it is so
> consisently low. That was a dry test - didn't do a wet one.
>
> Dave Milne, Scotland '91 Wagoneer
>
>
The first thing you are looking for is uniformity across all cylinders,
which you have. I wouldn't worry.
Earle
"Dave Milne" <jeep@_removethisbit_milne.info> wrote in message
news:8c7Wg.31235$r61.2601@text.news.blueyonder.co. uk...
> Any one got the specs for a compression check on a 360 v8 '91 ?
>
> I'm only getting 8 bar (~ 115 psi) pretty consistently across all
cylinders.
> I would have expected about 140-160 psi and am a bit surprised it is so
> consisently low. That was a dry test - didn't do a wet one.
>
> Dave Milne, Scotland '91 Wagoneer
>
>
10-08-2006, 11:15 AM
#5
Guest
Posts: n/a
Re: 360 v8 Compression check
Dave Milne wrote:
> Any one got the specs for a compression check on a 360 v8 '91 ?
Got me. 160 is "normal" for the I6, but it has a higher compression
rating than the V8.
> I'm only getting 8 bar (~ 115 psi) pretty consistently across all
> cylinders. I would have expected about 140-160 psi and am a bit
> surprised it is so consisently low. That was a dry test - didn't do a
> wet one.
Consistency (psi +- 10%) is what your looking for in a compression test.
- Run the engine till it gets warm to the touch.
- I find it easier on the battery with all the plugs out.
- Hold the throttle all the way open or the engine won't breathe.
- Cranking time varies, but most go with 5-10. I usually do 5.
FWIW, I do a compression test each time I change plugs. Except this
time, the hose on my compression tester sprang a leak. :( 160-165 is
what the I6 gets when warm.
--
DougW
> Any one got the specs for a compression check on a 360 v8 '91 ?
Got me. 160 is "normal" for the I6, but it has a higher compression
rating than the V8.
> I'm only getting 8 bar (~ 115 psi) pretty consistently across all
> cylinders. I would have expected about 140-160 psi and am a bit
> surprised it is so consisently low. That was a dry test - didn't do a
> wet one.
Consistency (psi +- 10%) is what your looking for in a compression test.
- Run the engine till it gets warm to the touch.
- I find it easier on the battery with all the plugs out.
- Hold the throttle all the way open or the engine won't breathe.
- Cranking time varies, but most go with 5-10. I usually do 5.
FWIW, I do a compression test each time I change plugs. Except this
time, the hose on my compression tester sprang a leak. :( 160-165 is
what the I6 gets when warm.
--
DougW
10-08-2006, 11:15 AM
#6
Guest
Posts: n/a
Re: 360 v8 Compression check
Dave Milne wrote:
> Any one got the specs for a compression check on a 360 v8 '91 ?
Got me. 160 is "normal" for the I6, but it has a higher compression
rating than the V8.
> I'm only getting 8 bar (~ 115 psi) pretty consistently across all
> cylinders. I would have expected about 140-160 psi and am a bit
> surprised it is so consisently low. That was a dry test - didn't do a
> wet one.
Consistency (psi +- 10%) is what your looking for in a compression test.
- Run the engine till it gets warm to the touch.
- I find it easier on the battery with all the plugs out.
- Hold the throttle all the way open or the engine won't breathe.
- Cranking time varies, but most go with 5-10. I usually do 5.
FWIW, I do a compression test each time I change plugs. Except this
time, the hose on my compression tester sprang a leak. :( 160-165 is
what the I6 gets when warm.
--
DougW
> Any one got the specs for a compression check on a 360 v8 '91 ?
Got me. 160 is "normal" for the I6, but it has a higher compression
rating than the V8.
> I'm only getting 8 bar (~ 115 psi) pretty consistently across all
> cylinders. I would have expected about 140-160 psi and am a bit
> surprised it is so consisently low. That was a dry test - didn't do a
> wet one.
Consistency (psi +- 10%) is what your looking for in a compression test.
- Run the engine till it gets warm to the touch.
- I find it easier on the battery with all the plugs out.
- Hold the throttle all the way open or the engine won't breathe.
- Cranking time varies, but most go with 5-10. I usually do 5.
FWIW, I do a compression test each time I change plugs. Except this
time, the hose on my compression tester sprang a leak. :( 160-165 is
what the I6 gets when warm.
--
DougW
10-08-2006, 11:15 AM
#7
Guest
Posts: n/a
Re: 360 v8 Compression check
Dave Milne wrote:
> Any one got the specs for a compression check on a 360 v8 '91 ?
Got me. 160 is "normal" for the I6, but it has a higher compression
rating than the V8.
> I'm only getting 8 bar (~ 115 psi) pretty consistently across all
> cylinders. I would have expected about 140-160 psi and am a bit
> surprised it is so consisently low. That was a dry test - didn't do a
> wet one.
Consistency (psi +- 10%) is what your looking for in a compression test.
- Run the engine till it gets warm to the touch.
- I find it easier on the battery with all the plugs out.
- Hold the throttle all the way open or the engine won't breathe.
- Cranking time varies, but most go with 5-10. I usually do 5.
FWIW, I do a compression test each time I change plugs. Except this
time, the hose on my compression tester sprang a leak. :( 160-165 is
what the I6 gets when warm.
--
DougW
> Any one got the specs for a compression check on a 360 v8 '91 ?
Got me. 160 is "normal" for the I6, but it has a higher compression
rating than the V8.
> I'm only getting 8 bar (~ 115 psi) pretty consistently across all
> cylinders. I would have expected about 140-160 psi and am a bit
> surprised it is so consisently low. That was a dry test - didn't do a
> wet one.
Consistency (psi +- 10%) is what your looking for in a compression test.
- Run the engine till it gets warm to the touch.
- I find it easier on the battery with all the plugs out.
- Hold the throttle all the way open or the engine won't breathe.
- Cranking time varies, but most go with 5-10. I usually do 5.
FWIW, I do a compression test each time I change plugs. Except this
time, the hose on my compression tester sprang a leak. :( 160-165 is
what the I6 gets when warm.
--
DougW
10-08-2006, 12:10 PM
#8
Guest
Posts: n/a
Re: 360 v8 Compression check
Thanks Doug & Earle.
Dave
"DougW" <post.replies@invalid.address> wrote in message
news:MC8Wg.32151$iA5.14083@dukeread11...
> Dave Milne wrote:
> > Any one got the specs for a compression check on a 360 v8 '91 ?
>
> Got me. 160 is "normal" for the I6, but it has a higher compression
> rating than the V8.
>
> > I'm only getting 8 bar (~ 115 psi) pretty consistently across all
> > cylinders. I would have expected about 140-160 psi and am a bit
> > surprised it is so consisently low. That was a dry test - didn't do a
> > wet one.
>
> Consistency (psi +- 10%) is what your looking for in a compression test.
>
> - Run the engine till it gets warm to the touch.
> - I find it easier on the battery with all the plugs out.
> - Hold the throttle all the way open or the engine won't breathe.
> - Cranking time varies, but most go with 5-10. I usually do 5.
>
> FWIW, I do a compression test each time I change plugs. Except this
> time, the hose on my compression tester sprang a leak. :( 160-165 is
> what the I6 gets when warm.
>
> --
> DougW
>
>
Dave
"DougW" <post.replies@invalid.address> wrote in message
news:MC8Wg.32151$iA5.14083@dukeread11...
> Dave Milne wrote:
> > Any one got the specs for a compression check on a 360 v8 '91 ?
>
> Got me. 160 is "normal" for the I6, but it has a higher compression
> rating than the V8.
>
> > I'm only getting 8 bar (~ 115 psi) pretty consistently across all
> > cylinders. I would have expected about 140-160 psi and am a bit
> > surprised it is so consisently low. That was a dry test - didn't do a
> > wet one.
>
> Consistency (psi +- 10%) is what your looking for in a compression test.
>
> - Run the engine till it gets warm to the touch.
> - I find it easier on the battery with all the plugs out.
> - Hold the throttle all the way open or the engine won't breathe.
> - Cranking time varies, but most go with 5-10. I usually do 5.
>
> FWIW, I do a compression test each time I change plugs. Except this
> time, the hose on my compression tester sprang a leak. :( 160-165 is
> what the I6 gets when warm.
>
> --
> DougW
>
>
10-08-2006, 12:10 PM
#9
Guest
Posts: n/a
Re: 360 v8 Compression check
Thanks Doug & Earle.
Dave
"DougW" <post.replies@invalid.address> wrote in message
news:MC8Wg.32151$iA5.14083@dukeread11...
> Dave Milne wrote:
> > Any one got the specs for a compression check on a 360 v8 '91 ?
>
> Got me. 160 is "normal" for the I6, but it has a higher compression
> rating than the V8.
>
> > I'm only getting 8 bar (~ 115 psi) pretty consistently across all
> > cylinders. I would have expected about 140-160 psi and am a bit
> > surprised it is so consisently low. That was a dry test - didn't do a
> > wet one.
>
> Consistency (psi +- 10%) is what your looking for in a compression test.
>
> - Run the engine till it gets warm to the touch.
> - I find it easier on the battery with all the plugs out.
> - Hold the throttle all the way open or the engine won't breathe.
> - Cranking time varies, but most go with 5-10. I usually do 5.
>
> FWIW, I do a compression test each time I change plugs. Except this
> time, the hose on my compression tester sprang a leak. :( 160-165 is
> what the I6 gets when warm.
>
> --
> DougW
>
>
Dave
"DougW" <post.replies@invalid.address> wrote in message
news:MC8Wg.32151$iA5.14083@dukeread11...
> Dave Milne wrote:
> > Any one got the specs for a compression check on a 360 v8 '91 ?
>
> Got me. 160 is "normal" for the I6, but it has a higher compression
> rating than the V8.
>
> > I'm only getting 8 bar (~ 115 psi) pretty consistently across all
> > cylinders. I would have expected about 140-160 psi and am a bit
> > surprised it is so consisently low. That was a dry test - didn't do a
> > wet one.
>
> Consistency (psi +- 10%) is what your looking for in a compression test.
>
> - Run the engine till it gets warm to the touch.
> - I find it easier on the battery with all the plugs out.
> - Hold the throttle all the way open or the engine won't breathe.
> - Cranking time varies, but most go with 5-10. I usually do 5.
>
> FWIW, I do a compression test each time I change plugs. Except this
> time, the hose on my compression tester sprang a leak. :( 160-165 is
> what the I6 gets when warm.
>
> --
> DougW
>
>
10-08-2006, 12:10 PM
#10
Guest
Posts: n/a
Re: 360 v8 Compression check
Thanks Doug & Earle.
Dave
"DougW" <post.replies@invalid.address> wrote in message
news:MC8Wg.32151$iA5.14083@dukeread11...
> Dave Milne wrote:
> > Any one got the specs for a compression check on a 360 v8 '91 ?
>
> Got me. 160 is "normal" for the I6, but it has a higher compression
> rating than the V8.
>
> > I'm only getting 8 bar (~ 115 psi) pretty consistently across all
> > cylinders. I would have expected about 140-160 psi and am a bit
> > surprised it is so consisently low. That was a dry test - didn't do a
> > wet one.
>
> Consistency (psi +- 10%) is what your looking for in a compression test.
>
> - Run the engine till it gets warm to the touch.
> - I find it easier on the battery with all the plugs out.
> - Hold the throttle all the way open or the engine won't breathe.
> - Cranking time varies, but most go with 5-10. I usually do 5.
>
> FWIW, I do a compression test each time I change plugs. Except this
> time, the hose on my compression tester sprang a leak. :( 160-165 is
> what the I6 gets when warm.
>
> --
> DougW
>
>
Dave
"DougW" <post.replies@invalid.address> wrote in message
news:MC8Wg.32151$iA5.14083@dukeread11...
> Dave Milne wrote:
> > Any one got the specs for a compression check on a 360 v8 '91 ?
>
> Got me. 160 is "normal" for the I6, but it has a higher compression
> rating than the V8.
>
> > I'm only getting 8 bar (~ 115 psi) pretty consistently across all
> > cylinders. I would have expected about 140-160 psi and am a bit
> > surprised it is so consisently low. That was a dry test - didn't do a
> > wet one.
>
> Consistency (psi +- 10%) is what your looking for in a compression test.
>
> - Run the engine till it gets warm to the touch.
> - I find it easier on the battery with all the plugs out.
> - Hold the throttle all the way open or the engine won't breathe.
> - Cranking time varies, but most go with 5-10. I usually do 5.
>
> FWIW, I do a compression test each time I change plugs. Except this
> time, the hose on my compression tester sprang a leak. :( 160-165 is
> what the I6 gets when warm.
>
> --
> DougW
>
>