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 Cooling / water pump problem
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James Ranaldi
V4 Guru

United Kingdom
1475 Posts

Posted - 04 Mar 2019 :  10:04:33 Show Profile Reply with Quote
Very interesting , well done .

1968 V4 96 ,LHD
1984 99 GL
1992 C900i Convertible
1993 C900 LPT Convertible
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Derek
V4 Guru

United Kingdom
2187 Posts

Posted - 04 Mar 2019 :  11:35:34 Show Profile Reply with Quote
Could the "thick" head be a low compression one from an industrial engine, pump or forklift?
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melle
V4 Guru

United Kingdom
3830 Posts

Posted - 04 Mar 2019 :  16:07:16 Show Profile Reply with Quote
Heads for high and low compression engines are identical, also the industrial ones.

www.saabv4.com
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digger
Starting Member

46 Posts

Posted - 05 Mar 2019 :  07:11:52 Show Profile Reply with Quote
In Jack Ashcrafts guide to tuning he mentions differences between 1500 and 1700 engines which as well as the crankshaft and pistons he says include the balance shaft, CYLINDER HEADS, intake manifold, valve springs, some manifold bolts and the CYLINDER HEAD BOLTS. He goes on to say the only item that won't interchange are the 1700 cylinder head bolts as they are 7.5mm longer.
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melle
V4 Guru

United Kingdom
3830 Posts

Posted - 05 Mar 2019 :  08:57:25 Show Profile Reply with Quote
I've worked on and broken a good few V4s and I've never found a difference between 1.5 and 1.7 heads or head bolts, nor does the parts book mention any differences as far as I'm aware (only between open and closed deck engines). That being said, I've never actively compared the parts, will do so next time I'm in the workshop, always happy to learn something new!

The difference in manifold bolts is related to the type of manifold, nothing to do with 1.5 or 1.7.

www.saabv4.com
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