 Flywheel markings are not aligned, On my 3.0L Six |
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| billd |
 Nov 25 2006, 01:33 AM
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#1
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Member  Group: Members Posts: 327 Joined: 25-May 05 From: Palo Alto, CA Member No.: 4,145  |
I just attached the flywheel to the engine I'm building to put in my 6 conversion. Its built on a Carerra 3.0 case and the flywheel is an original 914/6 flywheel. The flywheel has a Z1 mark - which I assume is supposed to be at TDC. However, when the crankshaft pulley is indicating TDC, the flywheel mark is about 20 degrees off.
Can anyone explain this? I pulled a spark plug and verified with a probe that the crankshaft pulley indication is correct. I'll post a picture shortly. |
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| Series9 |
Nov 25 2006, 02:33 AM
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#2
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Lesbians taste like chicken. Group: Members Posts: 5,444 Joined: 22-August 04 From: DeLand, FL Member No.: 2,602 Region Association: South East States |
It's obviously broken. I'll give you $100 for it............
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| spare time toys |
Nov 25 2006, 07:31 AM
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hooked on grilling food. Group: Members Posts: 4,059 Joined: 3-April 04 From: West Plano Tx Member No.: 1,884 Region Association: Southwest Region |
I ddont know squat about a six. What I do know is on some engines the TDC mark for a flywheel would line up to a referance point that isnt the same as where the TDC referance for the crank would be. The flywheel mark would get offset because you would use a port in the housing to see it. That port is offset from where the crank TDC is. So as long as the mark is there in the port the thing is at TDC. Hope that is clear as mud (IMG:style_emoticons/default/beerchug.gif)
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| PRS914-6 |
Nov 25 2006, 09:41 AM
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#4
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Excellence Magazine Project 914 3.6 Group: Retired Members Posts: 1,278 Joined: 20-May 06 From: Central California Member No.: 6,031 Region Association: None  |
That's normal, it's been 20 years since I dealt with that issue but if I recall the bolt pattern changed on the cranks. I used the Z1 front pulley at TDC and re-marked the flywheel for timing purposes.
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| IronHillRestorations |
Nov 25 2006, 10:01 AM
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#5
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I. I. R. C. Group: Members Posts: 6,719 Joined: 18-March 03 From: West TN Member No.: 439 Region Association: None 
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The crank throws are different on anything beyond a 2.2 (IIRC), so the flywheel will not be indexed correctly on a 2.4 and above engine. I ran into this a few years ago when I sold a new flywheel to Ed Mayo, and he told me it was bad (marked wrong). Well they were putting it on a 2.4S engine and sometime after he sent it back and got another one they ran into the same problem, so Ed got out an old 2.0 crank and 2.4 crank and discovered the difference.
What I now do is re-mark the Z1 and timing marks before you put the engine in the car. |
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