I hear that on most every head.
318 heads
- Thread starter dave ellis
- Start date
Most likely people ran them low on coolant and then got them hot.
(the ones that cracked)
The Reman 302 heads have buttons on the front frost plug as a temp sensor.
As long as you don't get them hot and the button drops off, they give you a full one year warranty on them if you don't over heat them.
(the ones that cracked)
The Reman 302 heads have buttons on the front frost plug as a temp sensor.
As long as you don't get them hot and the button drops off, they give you a full one year warranty on them if you don't over heat them.
For those that are looking.
302, 646, & 714 castings are all the same 318 closed chambered heads.
Nice Reman set here.
I was planning ahead a few years back and purchased a pair of 302 Reman Heads when they were in stock.
Knowing the day would come when they would no longer be available.
Keep Looking . . .
302, 646, & 714 castings are all the same 318 closed chambered heads.
Nice Reman set here.
I was planning ahead a few years back and purchased a pair of 302 Reman Heads when they were in stock.
Knowing the day would come when they would no longer be available.
Keep Looking . . .
72Dinger
Well-Known Member
might find this helpful in answering that question and selecting a set:
A Guide To Mopar V8 Cylinder Head And Block Casting Numbers
I'll go along with that. You always hear the bad stuff more.
Yes, they were still using 675 heads through 1974. Not really worth worrying about hard seats. Cracking is a factor, but they can be found. I have 3 sets, passed magneflux.
dave ellis
Well-Known Member
What are you asking for a pair of 675
Ask through a personal message. Let's not turn your thread into a sale thread.
I've found a number of exhaust seats cracked on "oldie-but-goodie" heads, frozen/not operating heat-riser flaps stuck partially to fully shut dumps all of the exhaust & heat through the 2 exh ports at the crossover ports...new crack city..
Could you elaborate a little more about the 302 head.
Dan the man
Well-Known Member
I think that he was talking about the "302" swirl port heads as mopar never made a actual 302 v8
Thanks, I knew.
MOPAROFFICIAL
Oogliboogli
The valve job that flows great to or up to .390. Ime has been a big bowl hog that absolutely kills .475 and up flow, opening the throat up to the max is about the only one that comes to mind. Stock xheads are not known to be low lift performers ootb, the j does better. Stock x heads when I tested 2.02 @218-222 cfm while the 2.02 915 flowed 228-232cfm 'only one port did 232cfm'.
Stocker 318 1.78 -175-181cfm... hogged out flow 210-220cfm ime.
124cc stock... to about 135 +/- cc small valve ported to the above.
Great on a 273 or 318 but corks on a 6500 +rpm 340/360.
What did your 318 rpm at the trap @11's 1/4 with the heads you reference?
Even the 360 LA heads are known to crack.
I went through 4 sets to come up with two good cylinder heads for a build all the way back in the 90's. Things haven't gotten any better. Most these parts are now long in the tooth and subject to high mileage. SM heads crack, just like other brands if they are abused and run hot.
6800 RPM through the lights
