loss of compresion

Asked by Feb 03, 2009 at 12:01 AM about the 1997 Porsche Boxster Base

Question type: Maintenance & Repair

i have a 97 porsche boxster that only has 35 pounds of compresion in the # 3 piston.what could be the cause of this issue. i think it may be the rings becasue the rest of the cylinders have full compresion.

2 Answers

65

It could be the rings, but it is most likely the valves or the head gasket, possibly the piston. You could have a chipped or bent valve, if that cylinder was burning very lean it could have burned a hole in the piston. Your spark plug hole may be leaking, check to see if the washer is damaged or broken, if that's OK you are going to have to pull the cylinder head off and physically inspect the valves and the pistons. If that doesn't get you anywhere you should pull the oil pan off and inspect the crankshaft and rod bearings. I don't know how easy or difficult that is to do on a Porsche but in my experience the most likely answer is te valves or the head gasket.

185

Do a leakdown test to determine with a greater certainty.

Your Answer

Add photo

Related Questions

  • loss of compresion 2 answers

    i have a 97 porsche boxster that only has 35 pounds of compresion in the # 3 piston.what could be the cause of this issue. i think it may be the rings becasue the rest of the cylinders have full compr...

    1997 Porsche Boxster Base

    -

    Maintenance & Repair

  • What is wrong with my Porsche? 3 answers

    I have a 2002 Porsche Boxster Convertible. It has less than 80,000 miles on it. She runs great, but all of a sudden when you crank the car the windows go up and down, and the doors lock and unlock on ...

    2002 Porsche Boxster Base

    -

    Maintenance & Repair

  • 2002 Boxter dash lights - oil etc come on when i push the top of the dash - then when i turn on the ignition some lights dont come on at all 1 answer

    Boxter S 2002 - electrical problems

    2002 Porsche Boxster S

    -

    Maintenance & Repair

  • 1998 Boxster dash problems 5 answers

    Hi Guys. I need help. My instrument cluster illumination lighting have stopped working. I'm trying to trace the problem. Only illumination not working. everything else works great. Does anyone...

    1998 Porsche Boxster Base

    -

    Maintenance & Repair

  • on board computer issue 2 answers

    Dears, I recently bought a 2004 boxster S "50th anniversary edition", my car no. is 882 out of 1953, it's imported from Japan. yet i have an issue with the on board computer language, IT'S STILL JAPA...

    2004 Porsche Boxster S Special Edition

    -

    Maintenance & Repair

Search Porsche Boxster Questions

Porsche Boxster Experts

#1 Michael Kane
Michael Kane
Reputation 310
#2 Stephen Smith
Stephen Smith
Reputation 300
#3 Andrew Dickens
Andrew Dickens
Reputation 260
View All

Related Models For Sale

Used Porsche 911
104 Great Deals out of 4,438 listings starting at $12,500
Used Chevrolet Corvette
207 Great Deals out of 22,044 listings starting at $2,500
Used Ford Mustang
717 Great Deals out of 44,996 listings starting at $1,500
Used BMW 3 Series
1,016 Great Deals out of 31,286 listings starting at $975
Used Mercedes-Benz SLK-Class
51 Great Deals out of 1,193 listings starting at $2,300
Used Mercedes-Benz SL-Class
49 Great Deals out of 2,734 listings starting at $2,995
Used BMW M3
28 Great Deals out of 1,316 listings starting at $4,990
Used Mazda MX-5 Miata
80 Great Deals out of 3,948 listings starting at $1,900
Used Chevrolet Camaro
348 Great Deals out of 31,370 listings starting at $2,500
Used Mercedes-Benz C-Class
602 Great Deals out of 24,803 listings starting at $1,995

Used Cars For Sale

2016 Porsche Boxster Base For Sale
5 listings starting at $49,991
2015 Porsche Boxster Base For Sale
50 listings starting at $41,900
2014 Porsche Boxster Base For Sale
34 listings starting at $35,500
2013 Porsche Boxster Base For Sale
52 listings starting at $33,444
2012 Porsche Boxster Base For Sale
4 listings starting at $24,997

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.