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· Registered
534 Posts
Discussion Starter · #1 ·

Today I received a new distributor, which contrary to what I have ordered (BOSCH 0 231 170 236, for a 1.6S engine) is a different model (BOSCH 0 231 170 153, for a 1.6N engine).

Are there any chances that this part will work correctly in my engine?

Concerning your very common 1.9S and 1.9N engines, are there any differences between their distributors (concerning advance curves)?

I am completely dissapointed as the part was bought at a city about 500km away, asked as a favour to a man I almost don't know, and who was assured by the shop that it was the correct part. Now it is a problem sending it back, as it was bought without a receipt and propably they won't get it back...

I am so unlucky once again... And I spent for it about 120 euros, which for a student is much...

· Old Opeler
5,564 Posts
Tiny Differences

The difference between an "S" and "N" motor distributor is probably very tiny and as you guess in the actual advance curve. Opel may not even stock a full range and only supply a limited range of distributors. As long as the distirbutor is physically similar and will fit into the motor you will probably not even notice the difference. Most of the small detail changes are Opel engineers "fiddling" to get exhaust emissions into the range that varrious laws require. I just use any distributor that is in good condition and replace the advance weight springs with two of the light ones - as do other tuners on this site - also the maximum advance has to be restricted so that the distributor does not give more than about 34 to 36 degrees (engine measurement - not distributor!) total advance. Just do a bit of a search for "ignition advance" or "distributor advance" on this site for more info.

Look at it this way - you have a new distributor! Have a chat to any Opel racing or rally guys in your neighbourhood to see what they do.

· Banned
3,910 Posts
They varied from year to year for the 1.9.

Bob's list below
1968 - 32-36.5 mechanical advance
19.5-22.5 vacuum advance
51.5-59 degrees total

1969 - 32-36 mechanical advance
11.5-14.5 vacuum
43.5-50.5 degrees total

1970 - 32-36 mechanical advance
11.5-14.5 vacuum
43.5-50.5 degrees total

1971 - 28-32 mechanical advance
7-10 vacuum
35-42 degrees total

1972 - 28-32 mechanical advance
7-10 vacuum
35-42 degrees total

1973 - 28-32 mechanical advance
1-5 vacuum
29-37 degrees total

1974 - 28-32 mechanical advance
1-3 vacuum
29-35 degrees total

1975 - 25 mechanical advance
5 degrees static timing
No vacuum advance unit
30 degrees total
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