1.8T Compression Problem
Thread Starter
Audiworld Junior Member
Joined: May 2010
Posts: 14
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1.8T Compression Problem
Okay so i did a leakdown test and here are the results.....What would you guys suggest is wrong? Bad rings? Heads? Or would it be something that only replacing a block would fix. There is a grinding noise inside the engine when i accelerate....any help would be appreciated thanks!
Cyl 1- Normal 40PSI
Oil dropped- 50psi
Cyl 2- Normal 60psi
Oil Dropped- 70psi
Cyl 3- Normal 140psi
Oil Dropped- 150psi
Cyl 4- Normal 120psi
Oil Dropped- 170psi
Cyl 1- Normal 40PSI
Oil dropped- 50psi
Cyl 2- Normal 60psi
Oil Dropped- 70psi
Cyl 3- Normal 140psi
Oil Dropped- 150psi
Cyl 4- Normal 120psi
Oil Dropped- 170psi
AudiWorld Member
Joined: Apr 2009
Posts: 578
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Is this a leak down test because it looks like your just posting up the results of a compression test.
A leak down test would tell you how much pressure is being leaked out from the valves or rings.
You have really bad compression on 1 and 2, does look to be a ring issue but you really need to do a "leak down" test to know exacly what % you are loosing in each cylinder and if its leaking because of bent valves, bad valve seats or bad rings.
A leak down test would tell you how much pressure is being leaked out from the valves or rings.
You have really bad compression on 1 and 2, does look to be a ring issue but you really need to do a "leak down" test to know exacly what % you are loosing in each cylinder and if its leaking because of bent valves, bad valve seats or bad rings.
Thread Starter
Audiworld Junior Member
Joined: May 2010
Posts: 14
Likes: 0
Is this a leak down test because it looks like your just posting up the results of a compression test.
A leak down test would tell you how much pressure is being leaked out from the valves or rings.
You have really bad compression on 1 and 2, does look to be a ring issue but you really need to do a "leak down" test to know exacly what % you are loosing in each cylinder and if its leaking because of bent valves, bad valve seats or bad rings.
A leak down test would tell you how much pressure is being leaked out from the valves or rings.
You have really bad compression on 1 and 2, does look to be a ring issue but you really need to do a "leak down" test to know exacly what % you are loosing in each cylinder and if its leaking because of bent valves, bad valve seats or bad rings.
Yeah the car shakes really bad and it shuts off but it does turn on and run but once you hit the gas you hear scraping.
Audiworld Junior Member
Joined: Jul 2008
Posts: 22
Likes: 0
Starting to sound like maybe a teardown is in order 
I'd probably pull the valve cover first. If everything looks ok there (cams bearing caps are secure, chain looks ok, etc) then pull the head to see the condition of the valves and piston tops.
I'd probably pull the valve cover first. If everything looks ok there (cams bearing caps are secure, chain looks ok, etc) then pull the head to see the condition of the valves and piston tops.
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