Luckie's engine had low compression on #3...., ....but I kept removing parts until...... Options

[Series9]

This cracked head gasket:

[Series9]

Ended up as this:

[brant]

ouch...

going back as a 2.0/4?

[stugray]

There should not have been ANY head gaskets.

Inspect the head carefully.That breach of the gasket probably wore away some of the mating surface.
If it is not too bad, the heads can be machined to get a new surface.
That will raise your CR if you do not shim under the jugs the amount that was machined off.

Stu

[McMark]

Whoa! That's a beat up main bearing. Might have a lead on a good 1.8 if you're interested.

[Cap'n Krusty]

There should not have been ANY head gaskets.

Inspect the head carefully.That breach of the gasket probably wore away some of the mating surface.
If it is not too bad, the heads can be machined to get a new surface.
That will raise your CR if you do not shim under the jugs the amount that was machined off.

Stu

I disagree with you, and I've been building T4 engines professionally since 1973. With the exception of the VW 2.0 engines with the redesigned heads (covered buy the TSB), I always install the head gaskets per the factory service manual. Jake Raby builds them without. He has a different view on the subject, and that's fine with me. Doesn't change either my experience or my opinion.

The Cap'n

[Series9]

Whoa! That's a beat up main bearing. Might have a lead on a good 1.8 if you're interested.

Mark,

All the bearings look pretty rough, but not compared to the cam and lifters. When the flashlight illuminated the cam, the disassembly was on.

You build a lot more of these than I. Show me the detail in the photo which made you make the comment about the main bearing.

[Series9]

There should not have been ANY head gaskets.

Newbie alert!!!!!!
(IMG:style_emoticons/default/bootyshake.gif) (IMG:style_emoticons/default/chair.gif)

[rick 918-S]

Whoa! That's a beat up main bearing. Might have a lead on a good 1.8 if you're interested.

Mark,

All the bearings look pretty rough, but not compared to the cam and lifters. When the flashlight illuminated the cam, the disassembly was on.

You build a lot more of these than I. Show me the detail in the photo which made you make the comment about the main bearing.

The center bearing shell in the case half is really worn/discolored.

I'm working on a 2.0 now that had the same head gasket issue but not as bad as Luckies. I had the heads checked and all they really needed were new guides.

[Series9]

Whoa! That's a beat up main bearing. Might have a lead on a good 1.8 if you're interested.

Mark,

All the bearings look pretty rough, but not compared to the cam and lifters. When the flashlight illuminated the cam, the disassembly was on.

You build a lot more of these than I. Show me the detail in the photo which made you make the comment about the main bearing.

The center bearing shell in the case half is really worn/discolored.

I already threw some of the bearings in the trash, but I'll take close-ups of the remaining pieces tomorrow. The bearings are bad, but the cam......ouch.

The funny thing is that it ran better than it had in a long time when I was driving it to the shop to pull it out.

[brant]

I am NOT an expert on this at all
so hopefully Jake will correct me, or the Capt' will correct me

but more and more of these cases need a line bore upon rebuild. The coper showing on the center bearing but less-so on the ends makes me wonder if your case might be untrue

?


I am building a 2.0 right now
had the case checked by a reputable builder for line bore because I put it together fresh and was disappointed with moderate oil pressure. Took it apart (76 miles fresh) for the line bore check and it was 2 sizes over (1 size over wouldn't clean it up)

so just something to look for
I'm no expert.

brant

[Jake Raby]

A gasket thats not installed can't fail... If the gaskets were made of a substantial material, my thoughts concerning their use wouldn't be as negative. Three sections of aluminum formed into a gasket of less than .030 thickness isn't my definition of substantial.

No engine that leaves my facility has a stock bore size, so the gaskets could not be used even if we wanted to use them.

What causes them to fail more than anything is overheating and the over-expansion that occurs with that followed by the rapid contraction of the thermal cycle.. This loosens the heads which reduces the clamping load of the head to the cylinder and the gasket.. Then the combustion leaks past and the gasket fails..

This post has been edited by Jake Raby: Feb 18 2011, 11:43 PM

[stugray]

Newbie alert!!!!!!

Jake Raby builds them without. He has a different view on the subject

So who is the newbie. I missed that part....

I am building a 2.0L right at this moment, and plan on no head gaskets.
The OP did not say what engine this came out of.

SCuZe Me!

Stu

[Series9]

Center main and rod bearings. This engine was finished.

[McMark]

Whoa! That's a beat up main bearing. Might have a lead on a good 1.8 if you're interested.

Mark,

All the bearings look pretty rough, but not compared to the cam and lifters. When the flashlight illuminated the cam, the disassembly was on.

You build a lot more of these than I. Show me the detail in the photo which made you make the comment about the main bearing.

You can see the copper colored wear marks clearly here. Bearings shouldn't be wearing down that much. There's a good chance that case needs a line bore as well.

[sean_v8_914]

out of balance, crank flex, had a wobble? why else would the wear be left to right?