Advice about bad bearing, rod, and crank

[xveganxcowboyx]

Unfortunately due to work I will not have any large amount of spare time for, oh say, 4 years... All of that starts in about a month. That's why i was in a bit of a hurry. Now that I pulled the head I might just end up waiting longer and build it better. I was expecting the head at least to be in reasonable condition since it was supposedly rebuilt, but obviously it was not. I can see light through half the valves when I shine a flashlight through. Pictures of all this fun coming in a few minutes.

And yes, it's a spare block. Mine runs fine, but has had low compression for a while. In theory I can wait but I wish I didn't have to.

http://img59.imageshack.us/img59/5229/bearingsdc7.jpg

http://img217.imageshack.us/img217/4986/crankng4.jpg

http://img217.imageshack.us/img217/1236/cylinderwallqs8.jpg

http://img217.imageshack.us/img217/3774/rodzx1.jpg

http://img61.imageshack.us/img61/3857/valvescl9.jpg

[DBMajik]

Unfortunately due to work I will not have any large amount of spare time for, oh say, 4 years... All of that starts in about a month. That's why i was in a bit of a hurry. Now that I pulled the head I might just end up waiting longer and build it better. I was expecting the head at least to be in reasonable condition since it was supposedly rebuilt, but obviously it was not. I can see light through half the valves when I shine a flashlight through. Pictures of all this fun coming in a few minutes.

And yes, it's a spare block. Mine runs fine, but has had low compression for a while. In theory I can wait but I wish I didn't have to.



I know exactly how ya feel man. But it's better to do it right the first time, than to have to keep ripping it apart for stuff you skimped on.

[JET]

That does look pretty bad. Do it right the first time, you can take out a turbo when you pop an engine too.

[xveganxcowboyx]

Turbo doesn't matter so much. It's a cheapy small 16g that I hope to replace in the not too distant future, but the attitude is about right. I just spent some time talking to a machinist about options. I'm going to bring some parts in to be looked at. Waiting to hear back about a crank, rod and piston combo before I make any big decisions.

[Goat Blower]

That crank definitely needs to be cut, or better yet, replaced with a decent used one. And definitely make sure you use a new oil cooler, you can't really clean out a bad one properly.

[iceminion]

The topline rebuild kit on ebay is cheap, lets say someone I know, absolutely not myself, bought one....

will the engine fail? how can it if the bearings are installed correctly?

just looking for some constructive criticism, no flames please, if my budget for an engine rebuild was $3000, it would have been doen correctly.

[Pushit2.0]

You pay for what you get, the parts are made cheaper somehow, quality/location etc.

[Wizard]

The crank can easily and cheaply inspected and cut and polished. Then its just using different bearings. Nothing wrong with doing it and often a great idea since many cranks are often not checked for several rebuilds.

http://www.partsamerica.com/ProductDetail.aspx?MfrCode=CRI&MfrPartNumber=13820&PartType=529&PTSet=A

I've actually used their reman. crank b4 and good results. Has a warranty and bearings.

Toss the rods, any knocking will egg-shape the rod end and just cause more spun bearings.

Cross hatching looks good as long as there isnt too much ridge at the top. And I don't like Topline parts but I have used them b4 and haven't had a motor fail. Its kinda hard to make a bad bearing other than burrs (which you should check for anyways, regardless of brand. These are mass-produced and spot checked for quality). Rings, etc are usually hard to screw up other than using lower quality materials. But even them they shouldn't fail quickly. It's 90% user error. Whether poor bearing clearance, weak oil pump, over-rev, etc. its usually not bad parts. Just a poor rebuild.

Check the cylinder bores for out-of-round and size. If they are on the large size, just get the cylinders bored to the next size. Id also recc. getting the block hot tanked, have the head freshened up with new stem seals, make sure to check the guides, relap the valves if needed. New oil pump is a must unless the current one is new. But I would at least take the gear drive apart and check the case for wear around the gears. Replace if there is ANY wear.

Take your time and check everything. Its free to do inspections, but not free to fix the lack of.

Wiz