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What is the psi for compression - 2002 Yamaha TW 200

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Anything over 100 to 110 psi should run. Anything from 120 to150 psi should be considered good . Remember the higher the PSI the higher the octane needed to run the machine. If you ride in the mountains, high octane can be hard to find.

Posted on Sep 03, 2010

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Compression psi on chevy 3.1l engine


go google -type in compression p[ressure for chev 3.1 engine . There will be pages of detail.
normal pressure can be expected to be around the 160-165 psi mark a used engine in good condition will be around 145 -150 psi anything around the 100 psi is a problem

Feb 18, 2015 | Cars & Trucks

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Compression psi hyunda elantra


about 120 so this engine is well past its best or the head gasket has failed between the compression rings on the gasket

Jan 29, 2014 | Cars & Trucks

1 Answer

What is the Compression supposed to be for a 1987 Toyota Pick up 22R with carb, 4 cyl.???


A new engine would be about 180 psi for each cylinder. As the miles add up and wear occurs, compression will get lower. The important thing is that compression is even and balanced-lowest compression reading should be within 75% of the highest cylinder's compression. Some Toyota engines had a minimum allowable compression of about 135 psi, but if compression is balanced, you could have average compression as low as 125 psi and engine would still run good, some loss of power but still acceptable, and oil consumption would not be that bad.
If cylinder compression is below 120 psi as an average, you should be looking into a rebuild event-rings and valves need attention. If any cylinder is below 100 psi, it may not even fire, certainly will produce no power, and could be a head gasket failure, very worn rings, or valve problems.
Remember the important thing is to find compression readings that are very close to each other. I have an '87 Sentra with 75,000 miles(true!)-lowest comp. is 160, highest is 165 psi-runs great, good power. Also a '79 Datsun pickup (with god only knows how many miles-about 200,000 maybe). Compression is about 125-135 psi, fairly well balanced-noticeable loss of power, very little oil burning, still runs fair to good-dependable, at least.
That should give you an idea of what to look for. Good luck.

Aug 29, 2013 | 1987 Toyota Pickup

2 Answers

I have a 99 sienna and the cylinders have low pressure what can i do?


If cylinder compression is too low, the car may not even start because of it. Have a shop do a compression test or a leak-down test to check the internal health of your engine. A good engine should have pressures of 150-200 psi in all cylinders and be close to each other. A worn or high mileage engine may have pressure as low as, say 125 psi, but if still balanced (close readings), would still run decent. Compression below that, especially below 100 psi, is serious trouble. ignition spark refuses to ignite the air/fuel mixture and you get a misfire-a non-working cylinder. Low compression can be caused by worn piiston rings or poor valve sealing. Low compression in 1 or 2 cylinders can be a valve problem, burned valves or valves not seating properly.
A leak-down test will check each cylinder and if there is a problem, the test will find the cause of the problem.

Dec 11, 2012 | 1999 Toyota Sienna

2 Answers

Bad compression on cylinder #2 2010 dodge charger


The lowest cylinder should be about 165 PSI, you have big problems here or faulty test equipment.

Oct 01, 2012 | 2010 Dodge Charger

1 Answer

98 honda accord v6 only has 90 psi compression


90 psi compression is the minumun for gas engine to ignite, you have low compression what is the compression next to it? The compression on Honda V6 is 200psi. you can have a valve problem a blown head gasket, Also make sure your compression gauge is accurate by using another compression gauge

Mar 23, 2012 | 1998 Honda Accord

1 Answer

What should a 98 dodge 5.2 compression be. Its in a 1500 Ram if that makes a difference.


GOOD COMPRESSION SHOULD BE 120 - 175 PSI IF COMPRESSION 100 PSI ACCEPTABLE. 90 PSI LOWER CYLINDER WEAK IF COMPRESSION 50 - 20 BLOWN HEAD GASKET.

Jul 05, 2011 | 1999 Dodge Ram

1 Answer

What should the compression be for a 1983 GS650GT, I have readings of 160 psi on three cylinders and 180 psi the other, I'm going to redo the check again with a different compression tester.


Taking compression test:- the bike's engine should be at normal running temperature and also tht the throttle should be in fully open position.
Your bike's engine has a compression ratio of 9:4:1
here is a guide frm compression ratio to psi :-
8>1 = 102.9 psi
8.5>1= 102.9 - 110.25 psi
9>1= 110.25 - 117.6 psi
9.5>1= 117.6 - 124.95 psi
10>1= 124.95 - 132.65 psi
10.5>1= 132.3 - 139.65 psi
11>1= 139.65 - 147 psi
11.5>1= 147 - 154.35 psi
12>1= 154.35 - 161.7 psi
Hope this helps!

Dec 27, 2009 | 1982 Suzuki GS 650 GT

1 Answer

What should the compression be on a 2004 Suzuki DRZ 125?


With the throttle held wide open, the compression should be between 140 psi and 180 psi. If the compression reads lower that 140 psi, adjust the valve tappet clearances and try again. Insufficient valve tappet clearance is the most common cause of low compression in four stroke engines.

Dec 08, 2009 | 2004 Suzuki DR-Z 125

1 Answer

Compression? psi?


anything over 70 psi will be just fine to make it run. But there can be a few difrint things that you should look at as well. pushrod adjustment is the first thing i would check, if compression is low.

Jul 25, 2009 | Harley Davidson FLHT - FLHTI Electra Glide...

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