Rebuilt '84 351W overheating
Thread Starter
|
Junior User
Joined: Apr 2003
Posts: 55
Likes: 0
Rebuilt '84 351W overheating
I bought a short block '84 351W for my Bronco some time ago and fitted it with Edelbrock Performer aluminum heads, Edelbrock performer intake, matching Edelbrock cam, and, of course, an Edelbrock Performer 1406 carb. I also went with an MSD ignition system - MSD Pro-Billet Distributor (mechanical advance), Blaster 2 Coil, and MSD 6 offroad CD ignition. I have a new stock water pump, all new hoses, and a new OEM radiator that has a 50/50 mix of anti-freeze & distilled water.
There's a 165 degree thermostat in the engine, but after about 30 minutes of freeway speeds, the coolant temp is up to 190 degrees. I know that's not too hot - but why isn't it staying around 165-170? I'm about 1500 miles into the break-in period for the engine. Also, I'm in Denver, so I'm wondering if the air is that much thinner that I don't get as much cooling?
Should I just switch to a 190 degree thermostat? Should I take the thermostat out and run it to see what temp it stabilizes at?
Any help greatly appreciated!
There's a 165 degree thermostat in the engine, but after about 30 minutes of freeway speeds, the coolant temp is up to 190 degrees. I know that's not too hot - but why isn't it staying around 165-170? I'm about 1500 miles into the break-in period for the engine. Also, I'm in Denver, so I'm wondering if the air is that much thinner that I don't get as much cooling?
Should I just switch to a 190 degree thermostat? Should I take the thermostat out and run it to see what temp it stabilizes at?
Any help greatly appreciated!
Thread Starter
|
Junior User
Joined: Apr 2003
Posts: 55
Likes: 0
Timing is set at 13 degrees BTDC. The plugs have a nice black soot on them... I know I'm running rich, but I haven't found a shop around here yet that will do a tune-up - but I'm still looking. I have the carb calibration kit - not sure which jets/rods to go to from the stock ones.
Thread Starter
|
Junior User
Joined: Apr 2003
Posts: 55
Likes: 0
Originally Posted by arctic y block
Sometimes removing the T-Stat will let the coolant circulate to fast and not cool. Making it run even hotter.
One other thing I should mention though... The intake has a built-in rear crossover for the coolant. It came with an insert to block it off, but I never put it in - I just plugged the hole on the top of the intake. So - I presume coolant circulates through that rear passage?
Thread Starter
|
Junior User
Joined: Apr 2003
Posts: 55
Likes: 0
Originally Posted by HemiEater
did you get the head gaskets installed the right way.
and is the water pump turning the right way.......
and is the water pump turning the right way.......
I think the head gaskets are on right. It's been too long since I did it, but I'm pretty sure there's only one way they'll go and match up all the holes. It ran pretty much around 172 degrees all the way from Minnesota to Colorado. This overheating business is something new.
I think those inserts you are talking about are for the exhaust crossover.
I think those inserts you are talking about are for the exhaust crossover.
HG
Trending Topics
Postmaster
Joined: Jun 2005
Posts: 2,656
Likes: 1
ok you can put the head gaskets on backwards......they are marked "front"
and all intake gasket sets come with block off plates for the egr port in the head/intake..I have never seen them made for water ports.
and last but not least the water pump......serpintine belt pumps trun CCW and V-belt pumps turn CW..if you mix them up the water pump is turning backwards......
and all intake gasket sets come with block off plates for the egr port in the head/intake..I have never seen them made for water ports.
and last but not least the water pump......serpintine belt pumps trun CCW and V-belt pumps turn CW..if you mix them up the water pump is turning backwards......
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
Posting Guru
Joined: Sep 2005
Posts: 2,238
Likes: 0
From: Kiefer, Northeastern Okla
They make 3 different Performers for the 351. 2 of them have the rear water crossover passage for EGR legal stuff. Of those 2, 1 is H.O. specific, and has an additional outlet beside the carb for the EFE valve. Dont know about the Eddy gaskets, but the FelPro's have provisions for the water, but need to be trimmed to properly fit the particular water port, to get good flow.
190*? That's just about perfect, IMO. I hear they got some big ol' hills in Colorado, and not much air to breathe, either.
My guess is tune coupled with your thin air's it. You ARE running a tight-fitting fan shroud, right? Does it ping under load?
Pete
190*? That's just about perfect, IMO. I hear they got some big ol' hills in Colorado, and not much air to breathe, either.
My guess is tune coupled with your thin air's it. You ARE running a tight-fitting fan shroud, right? Does it ping under load?Pete
Thread Starter
|
Junior User
Joined: Apr 2003
Posts: 55
Likes: 0
Originally Posted by HemiEater
ok you can put the head gaskets on backwards......they are marked "front"
and all intake gasket sets come with block off plates for the egr port in the head/intake..I have never seen them made for water ports.
and last but not least the water pump......serpintine belt pumps trun CCW and V-belt pumps turn CW..if you mix them up the water pump is turning backwards......
and all intake gasket sets come with block off plates for the egr port in the head/intake..I have never seen them made for water ports.
and last but not least the water pump......serpintine belt pumps trun CCW and V-belt pumps turn CW..if you mix them up the water pump is turning backwards......
The intake gaskets are on correctly - and I used "The Right Stuff" from Permatex in place of intake gaskets between the intake and the block.
No serpentine belts - so I think the water pump is good to go. I suppose even a new pump could have the impeller spinning on the shaft though. No bad noises to indicate that though.
Thanks for the feedback!
Thread Starter
|
Junior User
Joined: Apr 2003
Posts: 55
Likes: 0
Originally Posted by petes79f150
They make 3 different Performers for the 351. 2 of them have the rear water crossover passage for EGR legal stuff. Of those 2, 1 is H.O. specific, and has an additional outlet beside the carb for the EFE valve. Dont know about the Eddy gaskets, but the FelPro's have provisions for the water, but need to be trimmed to properly fit the particular water port, to get good flow.
Originally Posted by petes79f150
190*? That's just about perfect, IMO. I hear they got some big ol' hills in Colorado, and not much air to breathe, either. My guess is tune coupled with your thin air's it. You ARE running a tight-fitting fan shroud, right? Does it ping under load?
My guess is tune coupled with your thin air's it. You ARE running a tight-fitting fan shroud, right? Does it ping under load?Thanks for the reply!
Thread
Thread Starter
Forum
Replies
Last Post
arkredneck
335 Series- 5.8/351M, 6.6/400, 351 Cleveland
38
Oct 21, 2015 06:23 AM
ben73058
1948 - 1956 F1, F100 & Larger F-Series Trucks
73
Jul 29, 2014 09:23 AM
84f150guy
335 Series- 5.8/351M, 6.6/400, 351 Cleveland
5
Sep 7, 2004 11:57 PM
