Question about heat crossover on a 360 - Moparts Forums

Register Log In Moparts Forums Moparts Question and Answer Question about heat crossover on a 360

Print Thread

Question about heat crossover on a 360 #1425024 04/24/13 05:54 PM 04/24/13 05:54 PM
Joined: Oct 2010 Posts: 96 Oregon B Badge OP member
Badge OP member B Joined: Oct 2010 Posts: 96 Oregon	I am new to small block Mopars and need some advice. I have attached a link to a photo of the 360 I am taking apart. It has a Mopar high rise single plane intake. Part of what I assume is a heat crossover port on each cylinder head is exposed and full of debris. Is this OK? Also, this intake has no coolant crossover at the rear. Is this OK? Thanks ttp://i17.photobucket.com/albums/b65/Badge01/001-2_zpsb07fbeb5.jpg

Re: Question about heat crossover on a 360 [Re: Badge] #1425025 04/24/13 06:07 PM 04/24/13 06:07 PM
Joined: Nov 2003 Posts: 10,228 Colleyville 3hundred I Live Here
3hundred I Live Here Joined: Nov 2003 Posts: 10,228 Colleyville	Quote: I am new to small block Mopars and need some advice. I have attached a link to a photo of the 360 I am taking apart. It has a Mopar high rise single plane intake. Part of what I assume is a heat crossover port on each cylinder head is exposed and full of debris. Is this OK? Also, this intake has no coolant crossover at the rear. Is this OK? Thanks It's not okay, clean it out. Rear coolant crossovers didn't start until 1985, if I remember right that was to help combat the crossover plugging up. I don't know of any aftermarket manifold that incorporates the rear crossover. Robert '68 Fury Convertible '69 300 Convertible '15 Durango 5.7 Hemi '16 300 S Hemi

Re: Question about heat crossover on a 360 [Re: 3hundred] #1425026 04/24/13 06:30 PM 04/24/13 06:30 PM
Joined: Oct 2010 Posts: 96 Oregon B Badge OP member
Badge OP member B Joined: Oct 2010 Posts: 96 Oregon	Thanks Robert. Once I clean them out, how do I cover them? This manifold does not do the job.

Re: Question about heat crossover on a 360 [Re: Badge] #1425027 04/24/13 06:34 PM 04/24/13 06:34 PM
Joined: Nov 2003 Posts: 10,228 Colleyville 3hundred I Live Here
3hundred I Live Here Joined: Nov 2003 Posts: 10,228 Colleyville	Oh, finally found the picture. Never seen a manifold which covers that portion of the head, don't worry about it unless you just want to clean it. I thought we were talking about the crossover proper. Robert 7681152-001-2_zpsb07fbeb5.jpg (129 downloads) '68 Fury Convertible '69 300 Convertible '15 Durango 5.7 Hemi '16 300 S Hemi

Re: Question about heat crossover on a 360 [Re: 3hundred] #1425028 04/24/13 07:03 PM 04/24/13 07:03 PM
Joined: Sep 2007 Posts: 14,889 up yours Supercuda About to go away
Supercuda About to go away Joined: Sep 2007 Posts: 14,889 up yours	Not sure about that rear coolant cross over, my 87 Diplomat never had one. Maybe it was an EFI thing in trucks? If the small gap shown in the picture above is where your debris is, then that's not uncommon, you can clean it out if you want, but it tends to collect stuff there anyway. It's not connected to anything. If it's the actual passageway in the intake, then you ought to clean it out, even if you plant to run an intake gasket without an opening for that passageway. They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.

Re: Question about heat crossover on a 360 [Re: 3hundred] #1425029 04/24/13 07:20 PM 04/24/13 07:20 PM
Joined: Oct 2010 Posts: 96 Oregon B Badge OP member
Badge OP member B Joined: Oct 2010 Posts: 96 Oregon	Thank you for the info. I thought I best ask.

Re: Question about heat crossover on a 360 [Re: Badge] #1425030 04/24/13 09:41 PM 04/24/13 09:41 PM
Joined: Jan 2003 Posts: 25,200 Upper Midwest M MoparforLife Too Many Posts
MoparforLife Too Many Posts M Joined: Jan 2003 Posts: 25,200 Upper Midwest	The horse shoe shaped opening in the head around the heat cross over port is there to serve as an open air dam of sorts to break up with outside air the heat build up between adjacent exhaust ports and the hot heat crossover .

Re: Question about heat crossover on a 360 [Re: MoparforLife] #1425031 04/24/13 10:38 PM 04/24/13 10:38 PM
Joined: May 2003 Posts: 15,487 Florida S scratchnfotraction I Live Here
scratchnfotraction I Live Here S Joined: May 2003 Posts: 15,487 Florida	Quote: The horse shoe shaped opening in the head around the heat cross over port is there to serve as an open air dam of sorts to break up with outside air the heat build up between adjacent exhaust ports and the hot heat crossover . I keep mine clean with the airgun nozzle every now and then. no water cross over on any SB I ever worked on.

Moderated by Al_Alguire, Hotwheelsjr, moparts, not_a_charger, RangerDan440, tboomer

Hop To

Powered by UBB.threads™ PHP Forum Software 7.7.1