-
Welcome Visitor! Please take a few seconds and Register
for our forum. Even if you don't want to post, you can still 'Like' and react to posts.
Brand new timing chain and gears?
- Thread starter JAMMAN
- Start date
JAMMAN
Member
Uhhhh what was that? Try this
JAMMAN
Member
OK I can't post a youtube vid here for some reason.
- Joined
- Jul 27, 2008
- Messages
- 947
- City
- Alaska
- Vehicle Year
- 1998
- Transmission
- Manual
- My credo
- Shit Happens...Then You Die.
I watched both of them. Turn the engine over a few times by hand. One side should be taunt and a little slack in the other side. Looks normal to me.
- Joined
- Jun 1, 2001
- Messages
- 7,897
- Age
- 63
- Vehicle Year
- 1987... sorta
- Transmission
- Manual
A common problem years ago was guys Rebuilding their Chevrolet engines and wanting to do everything the car mags advocated.
They'd have their engines "Align bored" without them (or their engine machinist) realizing that since the block material was softer than the material the bearing caps were made from this raised the main bearing axis in the block and this has certain repercussions
One of which is such engines tend to have transmissions issues because the crankshaft axis is not aligned with the transmission input shaft because only rarely do people bother to check the engine dowel pin placement.
This is a good part of the reason why the TH400 automatic got a reputation for failure in drag racing applications (these transmissions front pump is sensitive to misalignment.
Another issue is since the crank axis is raised there is more slack in the timing chain which tends to cause timing scatter.
As a note a 2.9 or 4.0 engine would not have the issue you pictured, as both engines are fitted with tensioners to prevent chain slack.
Not to say there is a problem here...
They'd have their engines "Align bored" without them (or their engine machinist) realizing that since the block material was softer than the material the bearing caps were made from this raised the main bearing axis in the block and this has certain repercussions
One of which is such engines tend to have transmissions issues because the crankshaft axis is not aligned with the transmission input shaft because only rarely do people bother to check the engine dowel pin placement.
This is a good part of the reason why the TH400 automatic got a reputation for failure in drag racing applications (these transmissions front pump is sensitive to misalignment.
Another issue is since the crank axis is raised there is more slack in the timing chain which tends to cause timing scatter.
As a note a 2.9 or 4.0 engine would not have the issue you pictured, as both engines are fitted with tensioners to prevent chain slack.
Not to say there is a problem here...
Last edited:
JAMMAN
Member
Thank you for the respons(es).
No align bore here, a totally stock 1997 mercury mountaineer 5.0 being grafted to a 2000 ranger. The new chain is looser than the one I removed with over 150,000 miles on it.
Had a second problem with a melling high volume oil pump. I sat almost .300" higher than the stock one and neither of my oil pans would fit.
Jim
No align bore here, a totally stock 1997 mercury mountaineer 5.0 being grafted to a 2000 ranger. The new chain is looser than the one I removed with over 150,000 miles on it.
Had a second problem with a melling high volume oil pump. I sat almost .300" higher than the stock one and neither of my oil pans would fit.
Jim
JAMMAN
Member
Sponsored Ad
Sponsored Ad
TRS Events
Member & Vendor Upgrades
For a small yearly donation, you can support this forum and receive a 'Supporting Member' banner, or become a 'Supporting Vendor' and promote your products here. Click the banner to find out how.
Recently Featured
Ranger Adventure Video
TRS Merchandise
Follow TRS On Instagram
