Caterpillar Crankcase Damage

Posted on February 20, 2019 in Highlighted, Knowledge Base, News | Comments Off on Caterpillar Crankcase Damage

Caterpillar Crankcase Damage

We were overhauling a Caterpillar engine in the workshop the other day when we came across some significant damage – which is not an uncommon sight on engines with wet liners.

We’d removed the cylinder liners and inspected the crankcase, and this is what was found:

Caterpillar Liner Fretting

You’ll see the damage caused by fretting on both the liner and the crankcase e-bore.

Whilst the liner was going to be changed as part of the overhaul, there are different options for the crankcase e-bore:

1) Replace the crankcase
2) Use a specialist repair composite
3) Fit a sleeve, and machine back to original ID, ensuring the liner will be correctly aligned

If you find this on your engine, the right solution is going to depend on the extent of the fretting, class requirements and costings.

There are multiple potential causes (or even a combination), but commonly it is due to failure of the liner o-rings, incorrect use of inhibitor in the coolant, or even as a result of prolonged maintenance intervals.

If you do experience this type of fretting damage, you are at risk of water leaking into the engine oil leading to the type of problems highlighted above.

Alternatively, you could end up with a broken liner and fragments around the engine in the lube oil system.

Protect yourself by ensuring the coolant is maintained at the correct strength and any maintenance schedules are adhered to. Furthermore, ensure the e-bores are checked anytime the liners are removed.

If you need any help with it, email us info@bartechmarine.com or call +44 (0)1206 673101.

Don't miss out, fill in your details below to receive our latest news as it's posted directly to your inbox. No spam, our content is written by our engineers for engineers.

* indicates required field

By using and browsing the Bartech Marine Engineering website, you consent to cookies being used in accordance with our policy. If you do not consent, you must disable cookies or refrain from using the site.