| Author |  Topic  |
Pipsovich
Starting Member
Sweden
15 Posts |  Posted - 28 Feb 2019 : 11:52:48  
| [url=https://ibb.co/ZdyXqkS] [/url]
[url=https://ibb.co/JK7kf8H] [/url]
[url=https://ibb.co/yFZKcYT] [/url]
[url=https://ibb.co/HPj40Wv] [/url] |
Edited by - Pipsovich on 28 Feb 2019 11:57:50 |  |
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Pipsovich
Starting Member
Sweden
15 Posts | Posted - 28 Feb 2019 : 11:52:57
| [url=https://ibb.co/ZdyXqkS] [/url] [url=https://ibb.co/JK7kf8H] [/url] [url=https://ibb.co/yFZKcYT] [/url] [url=https://ibb.co/HPj40Wv] [/url] |
Edited by - Pipsovich on 28 Feb 2019 11:54:54 | |
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melle
V4 Guru
United Kingdom
3833 Posts | Posted - 28 Feb 2019 : 12:56:59
| You have a closed deck block.
www.saabv4.com | |
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melle
V4 Guru
United Kingdom
3833 Posts | Posted - 28 Feb 2019 : 13:30:22
| By the way: how does the crack testing spray work?
www.saabv4.com | |
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Pipsovich
Starting Member
Sweden
15 Posts | Posted - 28 Feb 2019 : 14:36:59
| Ok, and these are the correct heads for this block then, right.
Have a read here about penetrating test:
https://en.m.wikipedia.org/wiki/Dye_penetrant_inspection
PT is better than Magnetic testing (MT) for finding pores, but use it the surface must be very clean. To use it on heads like this they should be blasted first for realiable results.
I did not want to use mt on the block as the metal particles would destroy the engine bearings if not cleaned properly.
Sonett - 72
95 - 73
99 - 70
96 - 63
93 - 59
9-3 cabriolet -99
And a few other nonsaabs
Leyland 1000 -78 1.6 16V
Peugeot 404 -66
Volvo 244 -77 |
Edited by - Pipsovich on 28 Feb 2019 14:42:26 | |
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TTruckie
V4 Fanatic
United Kingdom
320 Posts | Posted - 28 Feb 2019 : 21:07:10
| | yep pretty sure they are closed deck heads | |
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TTruckie
V4 Fanatic
United Kingdom
320 Posts | Posted - 28 Feb 2019 : 21:08:23
| | yep - they are closed deck heads | |
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Derek
V4 Guru
United Kingdom
2191 Posts | Posted - 01 Mar 2019 : 11:47:35
| | Looks like you have a crack between the ports in the first shot? I once worked in the x-ray department of a specialist foundry and have seen this system used a lot. They used a dip tank for big items. We would find the cracks via x-ray and they would then weld. Ali and Magnesium, recheck with DP and then x-ray again. They would sometimes do this several times before rejecting the casting. Jet engine parts and similar things are a bit critical. We did F1 wheels as well and they got similar treatment. | |
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Pipsovich
Starting Member
Sweden
15 Posts | Posted - 01 Mar 2019 : 12:42:24
| That is not a relevant indication, but you are right, it looks like that in the picture. I mostly did the pt on the heads to find any pores so did not bother too much with the chambers as i had mt tested them before.
That sounds like a interesting job you had! I am an pressure vessel inspector.
Sonett - 72
95 - 73
99 - 70
96 - 63
93 - 59
9-3 cabriolet -99
And a few other nonsaabs
Leyland 1000 -78 1.6 16V
Peugeot 404 -66
Volvo 244 -77 | |
|
melle
V4 Guru
United Kingdom
3833 Posts | Posted - 01 Mar 2019 : 14:23:35
| Read up on dye penetrant testing, interesting process. Looks like something I can use in my shop, unlike Magnaflux. I have a background in industrial design and a healthy interest in metal casting and engineering processes in general, always good to learn something new.
On another note: it looks like your rad has a vented cap fitted, this should be on the overflow bottle.
www.saabv4.com | |
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melle
V4 Guru
United Kingdom
3833 Posts | |
Pipsovich
Starting Member
Sweden
15 Posts | Posted - 03 Mar 2019 : 18:17:21
| SOLVED! or at least it seems so!
She runs now, very nicely, with the other set of heads, but i found out this:
The passenger side head differs in height from the other head with as much as 7 mm! This made the bolts just a tiny bit too long, so that the heads weren't tighened down properly, but enough to make her run and get good compression without any load...
The old head also has a little different design than the other ones, the bolt near the exhaust port is a bit "further down" in the head, also the exhaust port is affected by this. See the pictures.
In the pictures you can see that the threads on the bolts is a little bit damaged at the ends.
The old head. Bolt at exhaust port is shorter.
"New head".
Bolt protruting through "new head".
Damaged head bolts.
The same bolt, protruding through the "old head".
Sonett - 72
95 - 73
99 - 70
96 - 63
93 - 59
9-3 cabriolet -99
And a few other nonsaabs
Leyland 1000 -78 1.6 16V
Peugeot 404 -66
Volvo 244 -77 |
Edited by - Pipsovich on 03 Mar 2019 18:24:17 | |
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melle
V4 Guru
United Kingdom
3833 Posts | Posted - 03 Mar 2019 : 20:32:55
| Good to hear you found the culprit! I'd say with such a difference, one must me an open deck head? I have an open deck engine, but I've never had it apart nor have I studied the heads, so I'm not sure what the exact differences are, but you surely can't shave 7mm of a closed deck head.
www.saabv4.com | |
|
Dirtbiker
V4 Guru
United Kingdom
1061 Posts | Posted - 03 Mar 2019 : 21:20:45
| Well done for figuring it out!
I have an open deck engine in bits - I will measure when I get a chance and let you know.
Cheers | |
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Pipsovich
Starting Member
Sweden
15 Posts | Posted - 04 Mar 2019 : 09:54:23
| Yes, very nice to have her running now i tell you!
Would be glad if i could find out if the head is of another type or what kind of head it is, at least. Good to have spare heads if they are ok :)
Sonett - 72
95 - 73
99 - 70
96 - 63
93 - 59
9-3 cabriolet -99
And a few other nonsaabs
Leyland 1000 -78 1.6 16V
Peugeot 404 -66
Volvo 244 -77 | |
|
| Topic | |
Cooling / water pump problem
