Can you i d my heads?

[83capril]

I think they are e5 heads. On the under side of 1 I have E5TE the other says E7TE " I do belive kinda hard to tell". Neither one has a smog bumg in the exaust port, and they look the same. On one it says 84309 stamped where the valve cover gasket goes. One also has 4J10 in a casting on it. I think the "1" is a 1 or it could be an I just a stright line. I hate catsings. I hope this will be enough info. Anyways Are these heads worth getting redone and useing on my motor. Will they work on it, it is a 68 302. I don't plan on doing any major engien work. Just new rings, maybe bearings. I have a bad valve in one and these heads on the motor. The heads are free. The motor has 9-1 compression. Any help would be great. If you need anymore info I will try to get it.

[FoxChassis]

4J10 = September 10, 1984

That is the date stamp (tag). What date stamp is on the other head?

If there are no bumps in the exhaust ports, they've been ground down.

[85_Capri_4v]

Pics would help.

I wouldn't be happy myself having an E5 head on one bank and an E7 on the other.

I have a pair of C8 302 heads that need work but are decent.

[Dugzy33]

werent the e5 and the e7's the same heads?
Came from the ford truck line right?
I have a book that saidafter the e6 fiasco that ford actualy used e5's for a while and that the e7's simply had the correct second digit for the the year. (1987)
just my 2 cents

[Marz]

werent the e5 and the e7's the same heads?
Came from the ford truck line right?
I have a book that saidafter the e6 fiasco that ford actualy used e5's for a while and that the e7's simply had the correct second digit for the the year. (1987)
just my 2 cents

Kinda the same head. The E5 vs E7 head thing has come up here before. Basically if you have E5's on your car there would be no real benifit with tossing E7's in their place.

[Dugzy33]

Here it is...
Page 204 in "The official ford mustang 5.0 technical reference and performance handbook"

The 1987-93 H.O. heads carry either an "E5TE" or "E7TE" prefix"



To the original question... I would make sure they were the same surface thickness, (the correct terminology escapes me)
otherwise the compression ratio could be diff between the 2 heads.
imo

[85_Capri_4v]

The E5 has an extreemly large smog boss in it while the E7 has hardly any (in comparision) granted the original poster said there wasn't any in either which is odd. So I would have to guess they were removed.

Now he also mentions the block is a 68 block which makes me think someone else dumped another engine in his Capri.

[83capril]

Yes someone did put another engien in the Capri. It was me. I had a v6, but it was slow. The engien is out now and I wanted to freshen it up. Would the E5 or E7 heads be an improvement over the stock one I have? Keep in mind I have to put a lead substitute in the gas every time I fill up. I think they would be better. I will try to get some pics up on either friday or monday. I will be out of town this weekend. going to the Woodward Dream cruse. But thanks for all the help.

[85_Capri_4v]

Lead substitute???

Sorry but you have been wasting your money.

The head numbers you gave already have hardened valve seats.

Even if you used pre-1975 heads you really do not need to use lead substitue because it takes miles and miles to ruin the valve seats.

Either find yourself some E7's GT40 or GT40P heads or C8 - D0 heads and you'll be fine.

[Marz]

Lead substitute???

Sorry but you have been wasting your money.

The head numbers you gave already have hardened valve seats.

Even if you used pre-1975 heads you really do not need to use lead substitue because it takes miles and miles to ruin the valve seats.

Either find yourself some E7's GT40 or GT40P heads or C8 - D0 heads and you'll be fine.

Indeed... The FE in my 58 Edsel is completely original with only 85K+ miles on it and all I've used was good old 87 octain in it... never added lead to it and it runs just fine. Running unleaded gas in a leaded engine really wont hurt the leaded engine. But running leaded in a unleaded engine will hurt it. Those heads are/were disigned for unleaded use... not leaded use.

[85_Capri_4v]

The only purpose for running leaded fuel was to add a little lube to the valve seats and possibly the guides. It has no other purpose. You can run leaded fuel in an unleaded engine. You shouldn't run leaded fuel in a vehicle with a cat, it'll ruin it. It will NOT harm an engine designed to run on unleaded fuel.

Now my opinion on the 87 octane in the 58 Edsel is I would run a little higher octane, the 352 or 390 in it most likely has 9:0 to 9.5:1 compression and 87 just won't cut it.

I hate these gas prices.

[MurPHy]

Lead substitute???

Sorry but you have been wasting your money.

The head numbers you gave already have hardened valve seats.

Even if you used pre-1975 heads you really do not need to use lead substitue because it takes miles and miles to ruin the valve seats.

Either find yourself some E7's GT40 or GT40P heads or C8 - D0 heads and you'll be fine.

I thought on the pre-unleaded engines, the lead was used to keep the valves cool, and if you didn't get hardened valves, you would burn your exhaust valves? I guess I'm way off base here?

[85_Capri_4v]

Lead substitute???

Sorry but you have been wasting your money.

The head numbers you gave already have hardened valve seats.

Even if you used pre-1975 heads you really do not need to use lead substitue because it takes miles and miles to ruin the valve seats.

Either find yourself some E7's GT40 or GT40P heads or C8 - D0 heads and you'll be fine.

I thought on the pre-unleaded engines, the lead was used to keep the valves cool, and if you didn't get hardened valves, you would burn your exhaust valves? I guess I'm way off base here?

Well it could burn valves, but it's not hardened valves it's hardened seats that are needed. The thing is I am sure there is far more older engines running around on unleaded and running fine than ones running around with some type of top engine lube.

[ashley roachclip]

a half baked reason for the octane to drop ....

[85_Capri_4v]

a half baked reason for the octane to drop ....

What do you mean?

[83capril]

OK I know that lead substitute dosen't go into unleaded engeins. But why wouldn't it go into a leaded engein? I have stated that the motor is a 1968 302. I didn't want to worsen my heads anymore than what they were. This is a daily driver that I run hard. I figured there was a reason they used leaded gas in that engein, right. Anyways thanx for the help. Lets just say they are E5 heads. are they worth puting on a stock non H.O. 302? The only upgrade is a 4 barrel carb/intake. The carb is a 670 Holley.

[85_Capri_4v]

85_Capri_4v
PostPosted: Thu Aug 18, 2005 1:53 pm Post subject:
Lead substitute???

Sorry but you have been wasting your money.

The head numbers you gave already have hardened valve seats.

Even if you used pre-1975 heads you really do not need to use lead substitue because it takes miles and miles to ruin the valve seats.

Either find yourself some E7's GT40 or GT40P heads or C8 - D0 heads and you'll be fine.

[ponydude]

I have read many times that the lead acts as a cushion between the valve and the seat. However, I have been running unleaded premium in my '66 for several years with no apparent problems.