wrcfan21

GRB Engine Rebuild

Recommended Posts

6 minutes ago, Omsin said:

"Shouldn't" - correct, "Have" - evidence suggests (debatable - Subaru motor is quite sensitive)

 

Was a class action lawsuit in America regarding piston rings, slightly different to bearings but the conclusion was more or less "poor / inadequate design"

 

That was for the EJ257 but even the EJ207 early on in the GR/GV live cycle was prone to spinning a bearing.

  • Like 1

Share this post


Link to post
Share on other sites
Posted (edited)
2 hours ago, Dairusire said:

 

That was for the EJ257 but even the EJ207 early on in the GR/GV live cycle was prone to spinning a bearing.

Yes, correct.

 

Speculation is that its an oil issue, too thin, sloshing to one side (ineffective baffle), oil pick up failure, low oil. Then again it seems more likely to be from knocking which would then cause a pretty quick sequence of events leading to the self destruction of the motor. 

 

Back on topic, it could be that the OPs motor had developed knock prior to the log above, the damage would have already been done to the crank / rods - which once the engine increases RPM as per the data logging run (even without knock at this specific point in time) would lead the engine to be operating off balance at high RPM and chew through the bearings?

Edited by Omsin
Spelling edit

Share this post


Link to post
Share on other sites
43 minutes ago, Omsin said:

Then again it seems more likely to be from knocking which would then cause a pretty quick sequence of events leading to the self destruction of the motor. 

Pretty much this, for both engines imo

  • Like 1

Share this post


Link to post
Share on other sites
Posted (edited)

Here's some pictures of the engine

https://drive.google.com/file/d/1WX_tSGqM6GVtLin1mQ-bBPFWHA_APeGj/view?usp=sharing

https://drive.google.com/file/d/11gP-tK_yd-DC5WP1Tfv7M9Hlw6v3SMwv/view?usp=sharing

https://drive.google.com/file/d/1jCZcOIaVEEKSzoYUSMgGZ5fQPH2z6KII/view?usp=sharing

 

The debris inside the bore was not there when the head was removed! It just from a dirty shop rag

Edited by wrcfan21

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.