Timing problem!!!

Topics Last Day Last Week Tree View    Getting Started Formatting Troubleshooting Program Credits    New Messages Keyword Search Contact Moderators Edit Profile Administration
Model T Ford Forum: Forum 2015: Timing problem!!!
Top of pagePrevious messageNext messageBottom of page Link to this message  By Frank van Ekeren (Australia) on Friday, August 14, 2015 - 04:17 am:

Hope some one on the forum can help with a problem a very experienced machinist and T mechanic has ran by me over the phone.

First, it's a full rebuild, ground crank, re-bore and ground cam.

Started checking an Anderson timer to see if within tolerance, each cyl was firing right at a few degrees ATDC for start-up, this is all being checked with the head still off but, this is the strange part, as fully advanced, the firing is now up to 1/2" difference across the 4 cyl's.

So the checks that have been done, cam is spinning true, front cover is aligned, no side play of the timers.

Next was to try another timer, a tiger, same thing, so I sent him a new TW brush timer to try, call today is still the same.

Any idea's on how it could end up with such a degree difference on advance across the 4 pistons?


Top of pagePrevious messageNext messageBottom of page Link to this message  By Andre Valkenaers on Friday, August 14, 2015 - 04:51 am:

Frank,
I think your front plate is out of center or the camshaft isn't straight.

Andre
Belgium


Top of pagePrevious messageNext messageBottom of page Link to this message  By Ken Kopsky, Lytle TX on Friday, August 14, 2015 - 06:37 am:

I think Andre is spot-on.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Frank van Ekeren (Australia) on Friday, August 14, 2015 - 06:56 am:

Thanks fella's,
That looks like it hits the nail on the head, he did tell me that his aligner fits the seal hole as mine uses the timer one, so now, with out seeing it, I'm thinking the cover is a poor casting, a little of centre.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Steve Tomaso - Milton,WA on Friday, August 14, 2015 - 08:50 am:

I believe the only proper way to set the timing cover to center is with the large diameter tool made for the recess that the timer actually resides in - whoever came up with the idea of producing a gauge to fit in the seal area was off-base.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Jim Walker on Friday, August 14, 2015 - 09:42 am:

with an anderson timer you can bend the prongs to compensate for an off center cover It migt make the unadvanced off but that doesnt matter as long as all pistons are hitting after top center.


Posting is currently disabled in this topic. Contact your discussion moderator for more information.
Topics Last Day Last Week Tree View    Getting Started Formatting Troubleshooting Program Credits    New Messages Keyword Search Contact Moderators Edit Profile Administration