About 4 hours ago I was literally thinking about having a compression test done. Roughly what should the compression be at in each cylinder?Originally Posted by dsmuts
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12-17-2013
About 4 hours ago I was literally thinking about having a compression test done. Roughly what should the compression be at in each cylinder?
12-17-2013
I think people see numbers around 160-190psi, but it seems numbers around 140psi might still get a mostly-working engine. Google tells me that ~15% separation between the highest and lowest psi is a happy place. Someone will chime in with something more precise, I'm sure.
12-17-2013
Well I do appreciate the info
12-19-2013
From what I've heard about a compression test is its less about what psi numbers your seeing and more about how far off the numbers between the cylinders are. Usually you don't want any of your cylinders being any more than about 10% from each other. That's about all I know about that.
12-27-2013
The mechanics said the compression test turned out fine, I have oil and coolant leaking and he said the leaking oil could be whats causing my sparkplugs to randomly burn up? They want me to bring my car back in on Tuesday so they can tell me how much the intake gasgets will cost.
12-27-2013
Do it yourself for way less. It's not that hard. Just take your time doing it and don't do what I did lol.
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12-27-2013
Where is it leaking? When they said the compression test was fine did they provide the particulars? What each cylinder was reading?
Have you replaced the plugs with stock (606's) yet? Because before you invest in the motor, you'd want to make sure it's worthwhile. Bottom line is if you plan to mod and then attempt to drop pulleys, the safest way to do so is by making sure everything mechanically is sound and up to par. Then have it tuned or scanned for a baseline, then tuned with mods, when good then, THEN... Drop pulley. There is no standard as to what you can do (mod) and then drop.
Anyways, you will pay slightly more than they would for parts and save on the biggest cost which is labor if you do some homework, gather all the tools and parts and roll up your sleeves to get dirty. For what you'll pay them to change the LIM gaskets, you can do that, the valve cover gaskets, tranny filter, gasket, fluid, engine oil, filter, fuel filter, plugs, wires and more... But I wouldn't do it if not knowing the engine was ok.
Last edited by coolone; 12-27-2013 at 05:57 PM.
12-27-2013
LIM gaskets are easy. If you are still looking for a tune I could do that and the LIM gasket for you for cheap.
12-27-2013
They did not give me the particular numbers from the test, I not 100% sure where all it is leaking, but there is oil pooled up right under my supercharger and leaking down under the snout and around the injectors. The coolant is I think leaking ever so slowly at the elbow and I think somewhere else but I can't see any bad leaks. Yes I went to the AL 606's. My mom was talking about paying for my car repairs for christmas, I am considering that since it's cold out and I don't have a garage or the tools to replace all the gasgets =/
12-28-2013
If they didn't give you numbers, I would suggest doing the test again yourself. In my experience, 75% of mechanics are crooks. If I saw a dying engine, I'd want to get paid to keep fixing it, too.
12-29-2013
Thats a good point. My grandpa I think has a compression tester somewhere
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