How To Identify Your Head?

[Guest smokinslim]

Are there any identifying numbers/marks on a TU head to distinguish it from others, or do you have to measure to valves to know exactly what you have?

 

I've suspected for a while now that the head i have isn't the original one for the engine, and through all the research i've done regarding current problems im having, im now even more sure of it and would like to find out for certain. The head may end up coming off soon anyway but im not gonna go there unless i really have to.

[stu_woac 1]

I think the samp is casted in it on the dizzy end may be mistaken tho

[Guest smokinslim]

Found these numbers cast on the front above the exhaust ports:

 

98 022 573 and 16 5 88.

 

I'm guessing the latter is the manufacture date, does the other mean anything to anyone?

[RossD 44]

I'm pretty sure all the carb'd TU heads are identical (apart from the 1.0). So, 1.1, 1.4 and the 85bhp 1.4 are the same. Its just things like the camshafts and carbs that are different.

[Guest smokinslim]

Don't the valve sizes differ too in some heads?

 

I'm trying to find out what size valves/which cam i have without having to take the head off if possible.

[trogboy 17]

I know at least two of the heads I have used have had 3S cast in them between a couple of the exhaust ports in big (50mm tall) letters. Both came off TU3S engines.

 

I too think that the 8V TU heads that came on the 205 all had the same size values with the exception of the TU9 (1lt) and TU24 heads.

[Guest smokinslim]

I too think that the 8V TU heads that came on the 205 all had the same size values with the exception of the TU9 (1lt) and TU24 heads.

 

According to Haynes this is true, with the exception of the TU3FM.

 

If my head isn't the original then it may have come from something other than a 205 though...

Edited November 12, 2007 by smokinslim

[RossD 44]

Actually, looking at the parts database, the TU3S head has a different part number to the normal 1.4 head... (I did always think they were the same)

How different the actual casting is, if it actually is any different at all would be interesting to know. Perhaps it is possible afterall to determine the TU3S head by the 3s cast into it. My old "normal" 1.4 engine doesnt have the 3S markings.

[Rippthrough 98]

Actually, looking at the parts database, the TU3S head has a different part number to the normal 1.4 head... (I did always think they were the same)

How different the actual casting is, if it actually is any different at all would be interesting to know. Perhaps it is possible afterall to determine the TU3S head by the 3s cast into it. My old "normal" 1.4 engine doesnt have the 3S markings.

 

 

It is different, the ports are a different shape and larger.

[calvinhorse 870]

does anyone know if the 1.6 heads are the same?

 

ie vtr, xsi, and the 306 blacktop

 

are all the manifolds interchangeable?

[RossD 44]

The TU5 heads all have the big valves and bigger cam bearings (i.e you cant fit a 205 cam to a TU5 head, it'll rattle around like a d*ck in a bucket )

[Mattsav 1]

1600 heads can come with either cam bearing size, just to make life a difficult as possible!

[RossD 44]

LOL, Good old PSA!

[calvinhorse 870]

yeah i fitted a tu24 cam to a 1.6 blacktop 306 and it worked! (no cock shlop!)

hmmm now im thinking my tu24 cam wont fit an xsi ffs..

 

i'll second the "good ol PSA"