When to rebuild 525SC motor ???????

Reply Subscribe

Thread Tools

10-06-2007, 10:30 PM

G Man

Registered

Thread Starter

Join Date: Jul 2005

Posts: 482

Likes: 0

Received 0 Likes on 0 Posts

When to rebuild 525SC motor ???????

Bottom end has 500 hours. Oid changed (MOb ! Syn) every 30 hours. When shouold it be rebuilt? Most time spent mid range.

10-07-2007, 01:43 AM

Griff

Charter Member # 55

Charter Member

Join Date: Oct 2000

Location: Omaha/LOTO

Posts: 19,736

Likes: 4,629

Received 1,966 Likes on 987 Posts

Just buy it!!!!!!!!!!!!!

You should clarify that the top end was rebuilt at 350hrs. I would expect it to be fine for at least another couple hundred or more hours. Probably check the valve spring pressures in another 100hrs.

10-07-2007, 08:25 AM

mrhorsepower1

Banned

Join Date: Feb 2005

Location: Cleveland, Ohio

Posts: 1,459

Likes: 0

Received 1 Like on 1 Post

I would perform a compression and leak down test. This will tell you how bad of shape the ring seal is.

10-07-2007, 07:40 PM

G Man

Registered

Thread Starter

Join Date: Jul 2005

Posts: 482

Likes: 0

Received 0 Likes on 0 Posts

Good one Griff !!! : ) d

10-07-2007, 09:17 PM

GCAT911

Registered

Join Date: Jun 2007

Location: League City, TX.

Posts: 150

Likes: 0

Received 0 Likes on 0 Posts

What a waste of Mob1. You are draining good oil out at 30 hours. Especially if you avoid extended WOT.

10-08-2007, 02:28 AM

Griff

Charter Member # 55

Charter Member

Join Date: Oct 2000

Location: Omaha/LOTO

Posts: 19,736

Likes: 4,629

Received 1,966 Likes on 987 Posts

Quote:

Originally Posted by GCAT911

What a waste of Mob1. You are draining good oil out at 30 hours. Especially if you avoid extended WOT.

Maybe, but better safe than sorry. It's less than $50 for the oil and filter and cheap insurance. Also it makes sense with a average season of 60hrs on the engine. Change it for the winter layup and once half way through the season.