Question - may be stupid = are our engines 2.4 - Interference engines? - Dodge SRT Forum
 
LinkBack Thread Tools Display Modes
post #1 of 14 (permalink) Old 07-22-2008, 06:09 AM Thread Starter
SRTforums Member
 
Join Date: Jul 2008
Location: Arlington, TX
Posts: 310
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Question - may be stupid = are our engines 2.4 - Interference engines?

Question - may be stupid - are our engines 2.4 = Interference engines?
d4Nk is offline  
Sponsored Links
Advertisement
 
post #2 of 14 (permalink) Old 07-22-2008, 06:16 AM
SRTforums Member
 
thepowertowin's Avatar
 
Join Date: Jul 2004
Location: Missouri
Posts: 19,296
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
The 2.4 Liter (148 cu. in.) in-line four cylinder engine is a double over head camshaft with hydraulic lash adjusters and four valve per cylinder design. The engine is free-wheeling; meaning it has provisions for piston-to-valve clearance. However valve-to-valve interference can occur, if camshafts are rotated independently.

So yes and no... it basically says the pistons won't hit valves, but the valves can hit each other.


Thinking of starting a "scammed by" thread? If you sent the paypal as a "gift" don't even bother... no one feels sorry for you.
thepowertowin is offline  
post #3 of 14 (permalink) Old 07-22-2008, 06:18 AM Thread Starter
SRTforums Member
 
Join Date: Jul 2008
Location: Arlington, TX
Posts: 310
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Well thank you
Yeah my friend had a laser, and the timing belt broke...bad news for him...
trashed his engine to say the least..
d4Nk is offline  
post #4 of 14 (permalink) Old 07-23-2008, 06:39 AM
SRTforums Member
 
thepowertowin's Avatar
 
Join Date: Jul 2004
Location: Missouri
Posts: 19,296
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Yes... no one EVER wants to pay for a timing belt...

that is until AFTER they pay for an engine.


Thinking of starting a "scammed by" thread? If you sent the paypal as a "gift" don't even bother... no one feels sorry for you.
thepowertowin is offline  
post #5 of 14 (permalink) Old 07-23-2008, 07:12 AM
User Banned
 
NeonDan's Avatar
 
Join Date: Dec 2002
Location: TB Fl./GSP SC.
Posts: 27,026
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by thepowertowin View Post
Yes... no one EVER wants to pay for a timing belt...

that is until AFTER they pay for an engine.
good point....had a local who asked me what i thought he should do since he had 64k miles, i told him to replace the timing belt ASAP. He chose to ignore the advice and less than 15k miles later the belt had a few teeth eaten off by the sprockets. Fortunately for him though he wasnt driving it when it happened but for about the price of a new short block a local shop put him on the road again....with a new belt.
NeonDan is offline  
post #6 of 14 (permalink) Old 07-23-2008, 07:21 AM
SRTforums Member
 
thepowertowin's Avatar
 
Join Date: Jul 2004
Location: Missouri
Posts: 19,296
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
It's funny... I can ALWAYS tell who has had their timing belt break. They'll call and ask how much to replace their timing belt, and when we can do it. And not complain about price at all. I remember some DOHC turbo stealths that had the same thing happen. Those were NOT cheap to fix by any stretch of the imagination. And yet, someone would think it was too expensive to replace the timing belt, and then more or less total their car w/ engine repair.


Thinking of starting a "scammed by" thread? If you sent the paypal as a "gift" don't even bother... no one feels sorry for you.
thepowertowin is offline  
post #7 of 14 (permalink) Old 07-23-2008, 10:07 PM
SRTforums Member
 
7055's Avatar
 
Join Date: Mar 2007
Location: KS
Posts: 2,362
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I was under the impression, even with the possibility of the valves hitting, that it was very rare to have any damage done to the motor if the timing belt breaks.

376/437 in HOM 343/382 on 91, now sold 4 more important ambitions
7055 is offline  
post #8 of 14 (permalink) Old 07-23-2008, 10:17 PM
SRTforums Member
 
West Palm SRT4's Avatar
 
Join Date: Jan 2006
Location: West Palm Beach
Posts: 1,082
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by 7055 View Post
I was under the impression, even with the possibility of the valves hitting, that it was very rare to have any damage done to the motor if the timing belt breaks.
If the belt breaks, then the cams cant rotate, thus not opening and closing the valves. So whichever valves are open when the chain goes, then they are FUBARd from collision with the pistons that are still moving. Also, whichever valves are closed are keeping air from flowing in and out of the motor.

Quote:
Originally Posted by 19 psi View Post
take off all the s3 shit and toys, sell it, put in the 50 trim then get pwnd by the guy who has all your s3 shit
West Palm SRT4 is offline  
post #9 of 14 (permalink) Old 07-23-2008, 10:43 PM
SRTforums Member
 
7055's Avatar
 
Join Date: Mar 2007
Location: KS
Posts: 2,362
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by West Palm SRT4 View Post
So whichever valves are open when the chain goes, then they are FUBARd from collision with the pistons that are still moving.
?? Pistons cannot contact valves.

376/437 in HOM 343/382 on 91, now sold 4 more important ambitions
7055 is offline  
post #10 of 14 (permalink) Old 07-24-2008, 07:07 AM
SRTforums Member
 
thepowertowin's Avatar
 
Join Date: Jul 2004
Location: Missouri
Posts: 19,296
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
The problem would be more likely if someone had some teeth strip off which could allow it to move one cam and not the other for a short period.


Thinking of starting a "scammed by" thread? If you sent the paypal as a "gift" don't even bother... no one feels sorry for you.
thepowertowin is offline  
post #11 of 14 (permalink) Old 09-16-2008, 05:17 PM
SRTforums Member
 
dodge_viper9's Avatar
 
Join Date: Sep 2008
Location: maine
Posts: 9
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
dont worry its not a stupied queston i was just wondering the same thing - im about to go to the junk yard and buy a 2.0 exhaust cam
dodge_viper9 is offline  
post #12 of 14 (permalink) Old 09-16-2008, 07:56 PM
Premium Member (Lifetime)
 
Join Date: Apr 2004
Location: Colorado
Posts: 2,313
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
i broke my timing belt the other week and took out 8 valves they did contact the pistons. This is is 9.1:1 compression and bc stage 3's lucky for me i wasnt at the top of the power band it was around 5k rpm so pretty lucky
kevinwarren240 is offline  
post #13 of 14 (permalink) Old 09-17-2008, 10:26 AM
SRTforums Member
 
Join Date: Jun 2007
Location: Jersey
Posts: 1,351
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
so when does the Timing belt need to be repalced on the SRT-4? what do they recommened from the manufacture? i had a mitsubishi before my Srt, an i had do change it out at 60k miles.. I have 49k now on my 04..
PK's 04 SRT is offline  
post #14 of 14 (permalink) Old 09-17-2008, 11:20 PM
SRTforums Member
 
Bebo's Avatar
 
Join Date: Sep 2006
Location: Panama City, FL
Posts: 2,457
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
60K is pretty standard on all cars with belts. There are some with "special circumstances" that allow them to go longer (Mazda Miata has longer intervals depending on original state of sale). On 1st gen Neons it was also standard to replce the head gasket at the sametime.

My Florida SRT.com

Quote:
Originally Posted by turbojonsrt4 View Post
If you can't handle the search function, I'm not so sure you'll be able to handle trimming a few inches off the stock pipe and clocking the turbo properly.
Bebo is offline  
Sponsored Links
Advertisement
 
Reply

User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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

 
For the best viewing experience please update your browser to Google Chrome