Page:
Home > Help Needed / General Tech Chat > Pistons

1380Turboman

166 Posts
Member #: 221
Advanced Member

15th Jun, 2005 at 10:49:00am

Lads as most of you know my engine has been smoking like a champion even though its hardly even done 400 miles.

So I measured by compressions and from the drivers side it read

1. 180psi
2. 120-130 psi
3. 0
4. 140psi


So I strip the head of to inpsect the pistons and the third one has a brave size of a chunk missing.

So this gets me thinking.......why is there so much psi across the range.......are these the wrong pistons?????

The number on the pistons is 21250-020-CXN, from looking on the internet this morning I know this is a 1275 piston with +0.20. Are these the right pistons for a turbo engine though??????/?

If these are, should I just replace the 1 piston or all 4?

Cheers in advance guys.

Paul.


mettyturbo

100 Posts
Member #: 344
The Royal Mail lose every parcel I ever send.....and I am a TWAT

15th Jun, 2005 at 12:30:04pm

i think you should be looking in the way of dished pistons seems like youve had a little detonation problem*frown*

Vegard

User Avatar

7765 Posts
Member #: 74
I pick holes in everything..

Chief ancient post excavator

Norway

15th Jun, 2005 at 12:58:18pm

http://www.minispares.com/Product.aspx?pid=33320

As far as I can remember, the 21251 pistons are the worst. Then come these which are OKish. Then the 21253, are the better ones from AE. This does not include (O)mega. But, the dish might not be suitable for you application. This is only the build quality of the pistons.

The21251 have got a large drain slot which is not good for big boost. I'm not sure how the 21250 is made.

On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem.
Home > Help Needed / General Tech Chat > Pistons
Users viewing this thread: none. (+ 1 Guests)  
To post messages you must be logged in!
Username: Password:
Page: