Piston/Head Questions

[MurphinDC]

I have a spare E12 head and block and was looking at the pistons below.  The block is out for analysis, but I need confirmation on these pistons.

• Do these look like piano tops?
• They appear to be 9.3 compression, is that the standard USA Tii pistons?
• They can be used with an E12 based on what I found on the FAQ, correct?

Thanks

Murph

 

[visionaut]

Yup.

Uh-huh.

Yessir.

[tech71]

3 hours ago, MurphinDC said:

Do these look like piano tops?

Not to me, they look like pistons for the E21 2.0 head.

piston in the pic is a Mahle and those are KS but whatever

Have them in my watchlist as well...

Pic 2 is a piano top

Edited June 6, 2023 by tech71

[Alexander]

 ..bump

Edited June 6, 2023 by Alexander

[Alexander]

On 6/6/2023 at 11:56 AM, tech71 said:

 

..

Edited June 14, 2023 by Alexander

[MurphinDC]

2 hours ago, tech71 said:

Not to me, they look like pistons for the E21 2.0 head.

piston in the pic is a Mahle and those are KS but whatever

Have them in my watchlist as well...

Pic 2 is a piano top

 

Thanks @tech71 I have to agree with you, they do look like the E21 style of pistons.  Thanks for the photos.

Murph

[tech71]

9.5 : 1 piano tops are still available from W&N in second oversize, about $1000 for 4 plus shipping😳

Catalog picture 11/18 - BMW 1502 - 2002 turbo - Engine parts / Cooling system | Wallothesch

WWW.WALLOTHNESCH.COM

 

[Conserv]

5 hours ago, MurphinDC said:

I have a spare E12 head and block and was looking at the pistons below.  The block is out for analysis, but I need confirmation on these pistons.

• Do these look like piano tops?
• They appear to be 9.3 compression, is that the standard USA Tii pistons?
• They can be used with an E12 based on what I found on the FAQ, correct?

Thanks

Murph

 

This is not a good photo from which to judge the type of piston.  How about re-creating one of @tech71’s photos with your pistons?

 

But if they say 9.3 on them, they’re likely not tii pistons. U.S. tii’s were generally 9.0, Euro tii’s were generally 9.5. 9.3 is, indeed, a compression ratio found on some rare Euro-spec e21 cars (the type, not the head) with E21 2,0 heads.

 

Regards,

 

Steve

 

[visionaut]

5 hours ago, visionaut said:

Yup.

Uh-huh.

Yessir.

So…

Nope.

Nada.

Nuh-uh.

 

Lol…

[MurphinDC]

Here's another picture which gives clarity as to the type.  I don't own the pistons.  Seller sent the photos.

 

Murph

[Conserv]

45 minutes ago, MurphinDC said:

Here's another picture which gives clarity as to the type.  I don't own the pistons.  Seller sent the photos.

 

Murph

As said previously, not for an E12 head!

 

Worthwhile if you have an E21 2,0 head!

 

Regards,

 

Steve

 

[tech71]

Those be pretty rare these days, I would grab them except I already managed to pick up a set. Took some doing, after a long dry spell, a few sets have cropped up on Ebay.

Bought mine from a seller in Egypt with no issues.

Hoping to get them into Survivors original engine (76 49 state 02 with E21 2.0 cyl head) at some point.

 

 

 

 

Oh what the heck, no reason to be greedy

BMW E21 E12 520 M17 320i 520i 1975 1976 1977 89.50mm pistons set rings pins

WWW.EBAY.COM

---

Find many great new & used options and get the best deals for BMW E21 E12 520 M17 320i 520i 1975 1976 1977 89.50mm pistons set rings pins at the best online prices at eBay! Free shipping for...

 

Edited June 7, 2023 by tech71