PT Cruiser Forum  
       

Go Back   PT Cruiser Forum > General Forums > Tech & Performance Forum

PT Cruiser Forum

engine low on compression

 
Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 27 Jun 2007, 05:34 pm
Fresh Cruiser
 
Join Date: Jun 2007
Posts: 3
Exclamation engine low on compression

my car had over heated a couple times and i think i may have stuck the rings a compression check showed 35psi which i know is about a 100psi of bare minimum compression could it be the valves and if this is a posibilty is there any chance the rings are fine what confussing me is it holds 35psi so would that point more towards the rings because there is no loss in compression? thanks for reading this
Reply With Quote
  #2 (permalink)  
Old 27 Jun 2007, 05:44 pm
Fanatic Cruiser
 
Join Date: Dec 2003
Location: San Antonio, Texas
Posts: 535
Default Re: engine low on compression

More than likely the head is warped. Aluminum heads on iron blocks don't take kindly to overheating. Depending on how bad the engine overheated the rings may still be good. A somewhat decent test is to squirt some oil in the cylinder and try the compression test again. If the compression comes up significantly then the rings are to blame. You could also have burned valves or cracked head due to overheating.Sounds like this is probably going to get expensive.
Reply With Quote
  #3 (permalink)  
Old 28 Jun 2007, 07:38 am
Regular Cruiser
 
Join Date: Jun 2007
Location: Wellington, Florida
Posts: 191
Default Re: engine low on compression

I'll be the first to admit that I'm not a mechanic. But I always wondered why they put aluminum together with cast iron on an engine since the expansion and contraction rates are different.
__________________
2005 GT Cruiser, Cool Vanilla, Automatic, Borla Dual Exhausts, K&N, Navigation and U Connect.

2001 Corvette Convertable, Navy Blue Metalic, Z51, 3:15 with 4" inch quad Borla Stinger Exhausts X Pipe and K&N Filter.
Reply With Quote
  #4 (permalink)  
Old 28 Jun 2007, 08:27 am
Fanatic Cruiser
 
Join Date: Dec 2003
Location: San Antonio, Texas
Posts: 535
Default Re: engine low on compression

Several reasons. Biggest is weight savings. Second is it allows higher compression due to faster heat transfer. Bet you would also be surprised to know that there is no gasket material as you know it in the head gasket. It's 3 sheets of metal with the top and bottom layer stamped with ribs around the openings and a little bit of silicone around those openings.
Reply With Quote
  #5 (permalink)  
Old 28 Jun 2007, 02:19 pm
Obsessed Cruiser
 
Join Date: Dec 2002
Posts: 6,759
Default Re: engine low on compression

check the head !!
Reply With Quote
  #6 (permalink)  
Old 29 Jun 2007, 10:07 am
Fresh Cruiser
 
Join Date: Jun 2007
Posts: 3
Unhappy Re: engine low on compression

hmm so maybe its a good time to do the mazaradi sp hed mod has any one ever done that on here ? doing the hed gasket was a ****ing nightmare i realllly dont wanna do it again im gonna do the oil trick today total frogot about that thanks for the tip this sucks i got 2 cars and a bike and non work lol ahhhh
Reply With Quote
  #7 (permalink)  
Old 29 Jun 2007, 10:11 am
Fresh Cruiser
 
Join Date: Jun 2007
Posts: 3
Default Re: engine low on compression

they had a recall on the hed gaskets or just changed them i think does mls ring a bell with yall i think thats what they changed to because haveing problems with blown heds has anyone else had a lot of trouble iwth there cruiser i have killed a clutch thrown a rod blew a hed gasket killed a gear box blew up my cvs and my brakes fried them selves altho i drive like i stole it and its extesively modified cams chip turbo nitro clutch everytime it broke i got a new better part lol soryy off topic so what should i do rebuild or drop a sebring six in it?
Reply With Quote
  #8 (permalink)  
Old 02 Jul 2007, 09:58 am
quicksilverdon's Avatar
Obsessed Cruiser
 
Join Date: Nov 2003
Location: NW NJ
Posts: 10,066
Default Re: engine low on compression

How many miles on the engine? I suspect it's the head. If you're 75,000 miles or over, then I suggest you do the timing belt when you have the dead off.
__________________
'05 Limited Turbo Lite, (Silver, of course)4-wheel ABS, Sunroof, Spoiler. Mods: E&G Classic grill, K&N FIPK, BTG duals, rear lowered 1.5", LED washer lights, $20 catch can, Aoogah horn, Weatherflectors, Sunroof Deflector, Fuzzy Dice, rear logo flames, rear pinstripe graphic, Gen3 Taillights, rear sway bar, hood struts, Strut bar.
Traded in '02 Silver Touring Edition w/87,000 miles
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Engine problem BORICUA Tech & Performance Forum 50 23 Jun 2012 03:40 pm
"Mysterious" turbo engine noise...??? Gary04GT Turbo Performance 76 21 Aug 2006 08:28 am
Review: $2200 for a NA replacement engine PT Ctown General PT Cruiser Discussions 8 24 Jul 2006 01:08 pm
Complete Engine Swap TaylorMade General Turbo Discussions 35 05 Jan 2005 02:34 pm
TSB 1802903: Engine Misfire PTskilla General Turbo Discussions 0 18 Aug 2003 12:13 am


All times are GMT -5. The time now is 08:11 pm.




Powered by vBulletin® Version 3.8.2
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
LinkBacks Enabled by vBSEO 3.6.0 PL2 © 2011, Crawlability, Inc.
vB.Sponsors