PDA

View Full Version : SRT4 connecting rods are weird?



1FastCSX289
07-19-2009, 08:34 AM
Hey, I just bought a set of used set of pistons and rods. Whats up with the rod caps on these things? They dont have a clean, machined surface on these things. It looks like the rod caps were layed on the edge of a bench and karate chopped......the edges are all jagged. Ive never seen this before. Whats the deal?

shadow88
07-19-2009, 08:52 AM
That's the "cracked cap" design that is quite common on Chrysler engines for a couple years now.

1FastCSX289
07-19-2009, 09:01 AM
That's the "cracked cap" design that is quite common on Chrysler engines for a couple years now.

Hmmmm......im assuming it decreases production costs some how.

glhs727
07-19-2009, 09:11 AM
cost some, but a better design too. This is a quote from a Ford engineer (Ford uses this design too)
"The rough irregular mating surface that forms when the bearing cap is physically fractured from the rod virtually eliminates cap shift."
later,
Cindy

shadow88
07-19-2009, 09:13 AM
I don't know the reason, but sure!:) That works!

DodgeZ
07-19-2009, 09:35 AM
http://www.modified.com/projectcars/0310scc_dodge_neon_srt_4/index.html

"cracked caps"

SoCalCSX
07-19-2009, 10:34 AM
The reason for this design is to use the cap to locate itself on the rod instead of using the bolt as the locator and the clamp. It helps reduce the stress put on the rod bolt from cap shift as stated above.

mario03SRT
07-19-2009, 10:53 AM
They came out on the 2.0 Neon...........a right fit every time!

thefitisgay
07-19-2009, 11:29 AM
"The SRT-4's engine management actually adjusts for hot weather by increasing boost until it's making the same power it would in cold weather, so there should still be no difference"

that makes me laugh

1FastCSX289
07-19-2009, 11:41 AM
Good info. THanks!:thumb:

Aries_Turbo
07-19-2009, 04:54 PM
the cracked cap does locate the rod cap perfectly but if you somehow trash a rod bearing and beat the large end out of round, its done. you cant rebuild them.

thats no biggie to you i assume cause you can just run T2 rods with a thicker bushing to accept the SRT pin.

brian

DodgeZ
07-19-2009, 05:15 PM
the cracked cap does locate the rod cap perfectly but if you somehow trash a rod bearing and beat the large end out of round, its done. you cant rebuild them.

thats no biggie to you i assume cause you can just run T2 rods with a thicker bushing to accept the SRT pin.

brian


I think a whole new piston and rod from Mopar is like 50 bucks.

1FastCSX289
07-19-2009, 06:25 PM
I think a whole new piston and rod from Mopar is like 50 bucks.

Its up to about 75 now, but still not too bad.

DodgeZ
07-19-2009, 08:19 PM
Its up to about 75 now, but still not too bad.

Did you ask for a discount?

1FastCSX289
07-19-2009, 10:49 PM
Did you ask for a discount?

Ask who? The 75 dollar price is as cheap as I could find them new on the web. If you go directly to the dealer, they list for over 100 now.

minigts
07-19-2009, 11:04 PM
You should ask him for to get you a discount.

http://shellgames.files.wordpress.com/2009/05/most_interesting_man.jpg

DodgeZ
07-20-2009, 08:52 AM
Ask who? The 75 dollar price is as cheap as I could find them new on the web. If you go directly to the dealer, they list for over 100 now.

I am sorry, I thought you were pricing from your local dealer. You may want to call up your local dealer to see what they can get you one for, tell them the price you are seeing on the net. Well, if you are really looking for one.

DodgeZ
07-20-2009, 08:53 AM
You should ask him for to get you a discount.

WHAT? I am dyslexic and that doesn't even make sense to me. Are you trying to say we should ask the pimp for a discount?

minigts
07-20-2009, 12:08 PM
WHAT? I am dyslexic and that doesn't even make sense to me. Are you trying to say we should ask the pimp for a discount?

Simply looking at this guy will yield a discount at the dealer.

glhs0426
07-20-2009, 11:05 PM
I work at a dealer and my cost after taxes would be $73.91 for a SRT-4 piston/rod assembly.

John

DodgeZ
07-21-2009, 09:23 AM
I work at a dealer and my cost after taxes would be $73.91 for a SRT-4 piston/rod assembly.

John

good to know! have a bunch of parts seen a hike in price lately?

crusty shadow
10-27-2009, 02:52 AM
the cracked cap does locate the rod cap perfectly but if you somehow trash a rod bearing and beat the large end out of round, its done. you cant rebuild them.

thats no biggie to you i assume cause you can just run T2 rods with a thicker bushing to accept the SRT pin.

brian

incorrect- you can rebuild them. cleavland77/michigan 77 offers bearing with oversized shells for the 2.4 cracked cap rods. you dont grind the mating surface and then hone the big end out to the stock size- you just hone it out to the next oversize bearing shell and youre done.

Aries_Turbo
10-27-2009, 09:32 AM
cool, i didnt know that was an option till now. :)

brian