B18B1 Compression Test Readings
08-12-2003, 05:24 PM
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B18B1 Compression Test Readings
I did a compression test today to check out the health of my car for potential future turbocharging. I pulled the spark plugs out one at a time (fuel injectors and fuse were left in, oops) and then cranked the engine for about 3 seconds per cylinder. I'd say the engine cranked somewhere between 8-14 times per reading. It is a 1995 Integra LS with 149,500 miles and I did the compression test right after changing the oil and filter. The readings were:
135-140-136-125
Isn't that bad? I have a spare B18B1 sitting in my garage that got readings of 195-200-195-200. That seems a lot better.
Ben
135-140-136-125
Isn't that bad? I have a spare B18B1 sitting in my garage that got readings of 195-200-195-200. That seems a lot better.Ben
08-12-2003, 05:36 PM
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Re: B18B1 Compression Test Readings (mr_mbuna)
i did one on mine a couple of weeks back which read 180-180-170-180 and i have 108,000 miles. I dont know what its suppose to be though
08-12-2003, 06:33 PM
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Re: B18B1 Compression Test Readings (mr_mbuna)
i think ls compression shud be around 180-190ish when i had my 96 LS with 60kmls
compression read 188-190-190-191
my GSR compression was like 210-220-215-220
compression read 188-190-190-191
my GSR compression was like 210-220-215-220
08-12-2003, 08:38 PM
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Re: B18B1 Compression Test Readings (mr_mbuna)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mr_mbuna »</TD></TR><TR><TD CLASS="quote">d I did the compression test right after changing the oil and filter. </TD></TR></TABLE>
your supposed to do comp test when the engine is warm
your supposed to do comp test when the engine is warm
08-12-2003, 08:42 PM
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Re: B18B1 Compression Test Readings (Dan GSR)
Yeah, warm up the engine before the test. Also remove all spark plugs and remove the 15amp F/I fuse. Also make sure the throttlebody is wide open. TRy again and you should hit 170-180. HTH
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08-14-2003, 01:39 PM
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Re: B18B1 Compression Test Readings (mmuller)
Your low readings are most likely your gauge and how long you crank the engine for. If you cranked it for like 10 seconds the pressure would be up there. As long as the numbers are close your ok. 125 and 140 are getting a bit far apart tho..
08-14-2003, 01:47 PM
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Re: B18B1 Compression Test Readings (mr_mbuna)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mr_mbuna »</TD></TR><TR><TD CLASS="quote">135-140-136-125</TD></TR></TABLE>
wow thats sad what have u been doin to ur motor lol poor ls have a
wow thats sad what have u been doin to ur motor lol poor ls have a
08-14-2003, 06:41 PM
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Re: B18B1 Compression Test Readings (legendboy)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by legendboy »</TD></TR><TR><TD CLASS="quote">If you cranked it for like 10 seconds the pressure would be up there.</TD></TR></TABLE>
just because you can get up to 180psi (or whatever it should be) after 30 cranks, doesn't mean it's healthy.
like a few have already said, you want the engine to be at operating temp. and at WOT when you check the compression. a healthy engine should get to its recommended pressure after at least 7-8 cranks.
for the b18b1, you want a max. difference of 28psi, a max. psi of 199, and a min. of 140psi. ideally, it should be around 180 straight across.
just because you can get up to 180psi (or whatever it should be) after 30 cranks, doesn't mean it's healthy.
like a few have already said, you want the engine to be at operating temp. and at WOT when you check the compression. a healthy engine should get to its recommended pressure after at least 7-8 cranks.
for the b18b1, you want a max. difference of 28psi, a max. psi of 199, and a min. of 140psi. ideally, it should be around 180 straight across.
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