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Author Topic:   My 72 Comet GT
John Hopkins
Journeyman

Posts: 3
From: Gustine,Texas
Registered: Nov 2003

posted 11-21-2003 01:53 PM     Click Here to See the Profile for John Hopkins   Click Here to Email John Hopkins     Edit/Delete Message   Reply w/Quote
I've heard that you can't use a reverse flow water pump on these cars? Well unfortunately I have one and my radiator has both openings on the passenger side. I have a 351w backed by a 4spd. An old 9 inch and it doesn't seem to want to run right. I just got a new distr. for it. Timing seems to be off. I just can't seem to get it right. I've never had such difficulty. And yes it does overheat.
thanks

John

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KULTULZ
Gearhead

Posts: 834
From: Rockville, MD
Registered: Oct 2002

posted 11-21-2003 08:29 PM     Click Here to See the Profile for KULTULZ   Click Here to Email KULTULZ     Edit/Delete Message   Reply w/Quote
You need the correct pump. Most likely the overheating problem is causing pre-ignition.

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John Hopkins
Journeyman

Posts: 3
From: Gustine,Texas
Registered: Nov 2003

posted 11-21-2003 08:40 PM     Click Here to See the Profile for John Hopkins   Click Here to Email John Hopkins     Edit/Delete Message   Reply w/Quote
So if i change the pump i'll have to get a different radiator? the comet was an original 6cyl. the guy i bought it off of had changed it over. I also want to install roller rockers, so i wonder what would be less expensive, rebuild my heads or get some already set up for them? And yes i eventually want a t5.

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69maverick
Moderator

Posts: 1486
From: Thomaston,CT.
Registered: Jan 2001

posted 11-21-2003 09:13 PM     Click Here to See the Profile for 69maverick   Click Here to Email 69maverick     Edit/Delete Message   Reply w/Quote
I would not recommend the T-5 unless you have it rebuilt to hold up to the 351 they are not the strongest tranny out there.

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RonnieT
Gearhead

Posts: 885
From: Port Allen, La. 70767
Registered: Jun 99

posted 11-21-2003 10:01 PM     Click Here to See the Profile for RonnieT   Click Here to Email RonnieT     Edit/Delete Message   Reply w/Quote
John,

No you will not need a new radiator if you change the water pump, you just need to get the right pump. If you look at the listings you will see they have pumps with right or left hand inlets. The location of the inlet does not determine if the pump is a reverse flow or not. The reverse flow is used on the late model engines that use a serpentine drive belt, the pump actually rotates the oposite direction than the early model pumps because it is driven by the top side of the belt. If you have a reverse flow pump on your engine, and a V belt drive, then your pump is rotating backwards and will not pump as designed. That would cause your overheating problem.

------------------
Ronnie
69 mach1 351W-4V engineless at the time!
70 Torino GT 351C-4v with a "shaker"
Mustangs and More Member #23

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Bluegras
Journeyman

Posts: 64
From: Easton,Pa.
Registered: Nov 2001

posted 11-22-2003 10:28 PM     Click Here to See the Profile for Bluegras   Click Here to Email Bluegras     Edit/Delete Message   Reply w/Quote
And get a fan that has the blade twist in the right direction to match rotation.
Ignition timing the 351 is no different that a 289 or 302. Number 1 cylinder at TDC, rotor pointing to #1 plug wire then time it with a lite.

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