Poor compression?

Submitted: Tuesday, Mar 30, 2004 at 16:22
ThreadID: 11681 Views:1735 Replies:3 FollowUps:1
This Thread has been Archived
This is a follow up to previous post about my 2H

Davoe gave me the desired numbers:
Desirable- 2746kpa
minimum- 1961kpa
maximum variation between cylinders 196kpa

And these are what came from the compression test today:
Cylinder 1: 1708kpa (350psi) 88% leakage to sump
Cylinder 2: 1611kpa (330psi) 90% leakage to sump
Cylinder 3: 1806kpa (370psi) 86% leakage to sump
Cylinder 4: 1806kpa (370psi) 84% leakage to sump & inlet
Cylinder 5: 1855kpa (380psi) 76% leakage to sump
Cylinder 6: 1855kpa (380psi) 44% leakage to sump & inlet

So the engine is beyond the recovery stage, and almost within the maximum variation. Any opinions? Im going to tassie for easter, and Cape York in June. I shouldnt have any problems doing that, should I?

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Reply By: Davoe - Tuesday, Mar 30, 2004 at 17:30

Tuesday, Mar 30, 2004 at 17:30
Sounds like it is nearer yhe end of its life than the beginning. I am no mechanic so anyone with better advice feel free. From the looks of those compresions it is tired but not stuffed. Alot would depend on how it is driving you seemed to indicate it still felt good. That being the case I wouldnt cancell those trips just yet. the Tassie trip will be a good one for you to decide whether you think it is up for a cape trip. If all is still well I would look at selling it in about 1 yr or look around for good price on a rebuild. Be warned I recently have had to have work done on my 2h motor and the prices for new parts will astound you. As I was in a hurry I had no option but you should have enough time to get beter deals especially with help from other forumites. Have fun!
AnswerID: 52574

Reply By: G.T. - Sunday, Apr 04, 2004 at 17:22

Sunday, Apr 04, 2004 at 17:22
Sorry so late with my reply, but shift work does not allow me to look at the forum as often as I would wish. No.1 and esp No2 clyinders are obviously the worst of the 6. It`s only a thought, your valve clearances may be out, this possibly could give you a bad reading. Worth a quick look just in case? Regards G.T.
AnswerID: 53155

Follow Up By: Davoe - Monday, Apr 05, 2004 at 16:15

Monday, Apr 05, 2004 at 16:15
most of the leakage in these 2 cylinders was to the sump indicating rings not valves
FollowupID: 314982

Reply By: jhetland - Tuesday, Apr 06, 2004 at 10:27

Tuesday, Apr 06, 2004 at 10:27
Thanks for your help all! Looking at the prices and the condition of the car, I think I will just keep on touring, but with some aerostart just in case.

AnswerID: 53365

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