Engine Aluminum Radiator Cap

sav22rem22

5 Year Member

Feb 6, 2020

397

86

48

North Carolina

Mar 29, 2021

#1

• Mar 29, 2021

• #1

Hey all. I don’t know if I’ve already talked about this but around a little under a year ago I installed one of those SVE radiators from LMR because my factory one was literally coming apart and my car was overheating bad. Well I don’t overheat anymore but I’m wondering if the 19 ib cap that comes on them is too much for my car. I had a particularly hard time bleeding the cooling system the other day and I noticed no coolant ever really went into the overflow.

Not really sure what this could be caused by. Car doesn’t overheat even in the summer and I do have good pressure (as noted when I got blasted in the face with thankfully not hot coolant)

 

nickyb

I gotta say i never painted my nuts, Never Ever

15 Year Member

Apr 3, 2009

2,979

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nevada

Mar 29, 2021

#2

• Mar 29, 2021

• #2

I belive the stock cap is a 16lbs..Don't think an old heater core or hoses can take much more pressure then that,even if the new rad. can.

 

foxbodybill89

Active Member

Jan 19, 2020

143

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38

Sioux Falls, SD

Mar 29, 2021

#3

• Mar 29, 2021

• #3

I have the same rad and can't get my coolant to recover from the tank, I'd like to use an OEM cap but have also seen that only the LMR cap fits their rad. I'm going to dig out my old cap and try it next weekend.

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,231

17,918

224

Massachusetts

Mar 29, 2021

#4

• Mar 29, 2021

• #4

Stock cap is 16 pounds

I'm using an SN95 cap on my (aftermarket radiator). Part number F4TZ-8100-B

1984-1998 Ford Cap F4TZ-8100-B | TascaParts.com

1984-1998 Ford part # F4TZ-8100-B - Cap

www.tascaparts.com

 

Willybill32

But at least it's tight!

5 Year Member

Jul 16, 2019

627

348

83

Lexington, KY

Mar 29, 2021

#5

• Mar 29, 2021

• #5

I installed the SVE radiator in my ‘86 and wound up using the cap off my stock radiator with no issues. It pushes coolant to the overflow when hot and recovers it as it cools.

 

7991LXnSHO

wanna catch the space herp

10 Year Member

Sep 1, 2010

7,387

2,745

194

Kearney, NE

Mar 29, 2021

#6

• Mar 29, 2021

• #6

A Stant Lev-R-vent cap should be OEM equipment. When you lift the lever on the cap and wait to turn it, it will vent pressure through the tank or overflow tube instead of in your face. The lever also locks the cap on when lowered. This is the style. I did not look up the application.

Stant Lev-R-Vent Radiator Cap Fits select: 1983-1991 CHEVROLET G30, 1990-1991 GMC RALLY WAGON / VAN - Walmart.com

Buy Stant Lev-R-Vent Radiator Cap Fits select: 1983-1991 CHEVROLET G30, 1990-1991 GMC RALLY WAGON / VAN at Walmart.com

www.walmart.com

 

91AOD5.0LX

I have a slight sag in my rear

5 Year Member

Feb 20, 2021

1,051

975

133

Lake George NY

Mar 29, 2021

#7

• Mar 29, 2021

• #7

Mustang5L5 said:

Stock cap is 16 pounds

I'm using an SN95 cap on my (aftermarket radiator). Part number F4TZ-8100-B

1984-1998 Ford Cap F4TZ-8100-B | TascaParts.com

1984-1998 Ford part # F4TZ-8100-B - Cap

www.tascaparts.com

Click to expand...

Same cap I use and works well

 

Wayne Waldrep

Before I post a pic, do you have one of yours?

20+ Year Stangneter

Apr 14, 2003

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Cuba, AL

Mar 29, 2021

#8

• Mar 29, 2021

• #8

I've had a couple of the SVE radiators. I finally stopped my problems by using a Ford F150 cap that's 13#. I feel better about the lower pressure as well.

 

sav22rem22

5 Year Member

Feb 6, 2020

397

86

48

North Carolina

Mar 30, 2021

#9

• Mar 30, 2021

• #9

Thanks everyone for the replies. I still had my old 16# cap and it actually fit the sve radiator. I haven’t driven it enough yet to notice a difference except for that a bunch of coolant got sucked back into the radiator. Although when coming home tonight I checked the overflow tank and noticed occasional bubbles almost as if it was being burped. This was with the car off. However I never see bubbles in the actual radiator

 

sav22rem22

5 Year Member

Feb 6, 2020

397

86

48

North Carolina

Apr 7, 2021

#10

• Apr 7, 2021

• #10

foxbodybill89 said:

I have the same rad and can't get my coolant to recover from the tank, I'd like to use an OEM cap but have also seen that only the LMR cap fits their rad. I'm going to dig out my old cap and try it next weekend.

Click to expand...

I’m starting to think the same. After some time using the cap from my old radiator I don’t have to use any pressure to put it which worries me. I’ll probably check out some of the suggestions left in this thread though

 

Wayne Waldrep

Before I post a pic, do you have one of yours?

20+ Year Stangneter

Apr 14, 2003

1,338

659

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Cuba, AL

Apr 7, 2021

#11

• Apr 7, 2021

• #11

Several people have used various caps with this radiator.... Including me. They do not require an LMR cap. That should solve that doubt.

 

sav22rem22

5 Year Member

Feb 6, 2020

397

86

48

North Carolina

Apr 7, 2021

#12

• Apr 7, 2021

• #12

Willybill32 said:

I installed the SVE radiator in my ‘86 and wound up using the cap off my stock radiator with no issues. It pushes coolant to the overflow when hot and recovers it as it cools.

Click to expand...

Hmm I’ve been using my cap from my old stock and mine doesn’t seem to fit very tight. May be a dud I’ll have to see

 

sav22rem22

5 Year Member

Feb 6, 2020

397

86

48

North Carolina

Apr 7, 2021

#13

• Apr 7, 2021

• #13

Wayne Waldrep said:

Several people have used various caps with this radiator.... Including me. They do not require an LMR cap. That should solve that doubt.

Click to expand...

Alright I appreciate it. I see you were using a 13# from an f-150? Do you have a part number for that? I’d like to check that out since I’d like for my pressure to be a little lower as well

 

Wayne Waldrep

Before I post a pic, do you have one of yours?

20+ Year Stangneter

Apr 14, 2003

1,338

659

143

Cuba, AL

Apr 7, 2021

#14

• Apr 7, 2021

• #14

I just bought a factory replacement 1996 F150 cap for a truck with the 5.0L engine. If you can cross reference any of those numbers and find a motorcraft that's what I would get.