Compression test results advice
Thread Starter
Too many posts.. I need a life!!
Joined: May 2013
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From: Cramlington
Compression test results advice
After a 'spirited' drive home from work this morning, I got home and noticed my Series 2 didnt sound quite right.
Ive just checked all the usual culprits (hoses, oil level, water level, breathers, air intake etc etc), found nothing obvious so did a warm dry compression test.
Results are (from timing side first)... 123, 130, 87, 130.
As a comparison in April they were... 145, 145, 140, 145.
Car is a very healthy example with all new gaskets and seals in the last year.
Ive no smoke from the exhaust, no overheating, oil and water arent mixing.
One other thing of note, there was a fair amount of oil seeping out the oil filler cap (chrome rocker & cap). Ive a bailey breather system, which is fairly new, and clear.
Am i looking at piston rings, or something else?
Head gasket is about 500 miles old, so shouldnt be that hopefully
CheeRS fellas.
Ive just checked all the usual culprits (hoses, oil level, water level, breathers, air intake etc etc), found nothing obvious so did a warm dry compression test.
Results are (from timing side first)... 123, 130, 87, 130.
As a comparison in April they were... 145, 145, 140, 145.
Car is a very healthy example with all new gaskets and seals in the last year.
Ive no smoke from the exhaust, no overheating, oil and water arent mixing.
One other thing of note, there was a fair amount of oil seeping out the oil filler cap (chrome rocker & cap). Ive a bailey breather system, which is fairly new, and clear.
Am i looking at piston rings, or something else?
Head gasket is about 500 miles old, so shouldnt be that hopefully
CheeRS fellas.
Number three is obviously far too low may have blown the HG there, the others are low too but are at least even, could be rings or maybe valves not sealing well.
A fresh engine would see 175psi for comparison.
A fresh engine would see 175psi for comparison.
Thread Starter
Too many posts.. I need a life!!
Joined: May 2013
Posts: 531
Likes: 23
From: Cramlington
Time for a big strip down again then fellas?
Dont know if it makes a difference, but ive arp's, mahle pistons, and wossner rods. Headgasket was a new uprated dual fire ring jobbie.
Can the rings be done with the block in the car on the Series 2?
Its off the road till after christmas now, so have nothing but time to sort it.
Dont know if it makes a difference, but ive arp's, mahle pistons, and wossner rods. Headgasket was a new uprated dual fire ring jobbie.
Can the rings be done with the block in the car on the Series 2?
Its off the road till after christmas now, so have nothing but time to sort it.
PassionFord Post Whore!!
Joined: Aug 2004
Posts: 3,502
Likes: 184
From: Colchester,essex
Yes, but by the point you've got everything off you may as well have just removed the whole lot. Plus it'll need a hone/possible rebore depending on the state of things
Thread Starter
Too many posts.. I need a life!!
Joined: May 2013
Posts: 531
Likes: 23
From: Cramlington
Bugger, oh well, keep me off the streets I guess.
As a side question, Ive been considering a swap for a tall block 1.9. Much involved in putting one of these in?. Are they worth it in regards to bhp gains vs price?.
As a side question, Ive been considering a swap for a tall block 1.9. Much involved in putting one of these in?. Are they worth it in regards to bhp gains vs price?.
Hans
Joined: Feb 2011
Posts: 25
Likes: 1
From: Holland
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