Help with compression test results.

Bludge · Post by **Bludge** » Thu Oct 15, 2015 3:30 pm

I borrowed a compression tested and checked my engine today, from drivers side to passenger side the results were as follows

1: 266
2: 256
3: 260
4: 168

Im guessing number 4 being that low is bad? it also took a fair bit more cranking to get it up that high, where as the others got there numbers after 3/4 strokes.

Where do i go from here?

*EDIT* Also, 1000 posts! woo. only took me 2 and a half years...

Post by **Drax** » Thu Oct 15, 2015 3:37 pm

haha congrats on the posts. could be as simple as you need to do Valve Clearances

Bludge · Post by **Bludge** » Thu Oct 15, 2015 3:39 pm

Drax wrote:haha congrats on the posts. could be as simple as you need to do Valve Clearances

Thanks! and i have been meaning to do the valve clearances for a while now, bought the feeler guages but never got around to it.

Post by **Drax** » Thu Oct 15, 2015 3:50 pm

Bludge wrote:
Drax wrote:haha congrats on the posts. could be as simple as you need to do Valve Clearances
Thanks! and i have been meaning to do the valve clearances for a while now, bought the feeler guages but never got around to it.

its very easy to do, just time consuming. just don't get confused with the order like I did one night, nearly wrecked Will's lude

lol

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Thu Oct 15, 2015 4:00 pm

Yep, don't know what the correct specialist is (not got manual to hand) but no.4 is definitely way too low...

Bludge · Post by **Bludge** » Thu Oct 15, 2015 5:02 pm

Drax wrote:
Bludge wrote:
Drax wrote:haha congrats on the posts. could be as simple as you need to do Valve Clearances
Thanks! and i have been meaning to do the valve clearances for a while now, bought the feeler guages but never got around to it.
its very easy to do, just time consuming. just don't get confused with the order like I did one night, nearly wrecked Will's lude lol

Not really filling me with confidence! Lol

So is it likely to improve the compression then? I head something about diagnosing the problem by dropping some oil in the chamber and retesting to see if it improves?

prelude91 · Post by **prelude91** » Thu Oct 15, 2015 5:50 pm

I believe the method you describe will only tell you if the piston rings are worn, and don't be tempted to test the compression with too much oil in the cylinder as it wont compress and may ruin the small/ big end bearings.

Post by **RattyMcClelland** » Thu Oct 15, 2015 9:22 pm

Did you do a wet compression test with a drop of oil in each cylinder. This will tell you how you rings are.

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Thu Oct 15, 2015 9:31 pm

Post by **Drax** » Fri Oct 16, 2015 9:40 am

wurlycorner wrote:

Bludge wrote:
Drax wrote:
Bludge wrote:
Drax wrote:haha congrats on the posts. could be as simple as you need to do Valve Clearances
Thanks! and i have been meaning to do the valve clearances for a while now, bought the feeler guages but never got around to it.
its very easy to do, just time consuming. just don't get confused with the order like I did one night, nearly wrecked Will's lude lol
Not really filling me with confidence! Lol

So is it likely to improve the compression then? I head something about diagnosing the problem by dropping some oil in the chamber and retesting to see if it improves?

just follow the general guide and you wont go wrong

http://www.ludegeneration.co.uk/honda-p ... t5116.html