Pulling the engine apart-PHOTOS TOO, Where do I stop? Options

[PanelBilly]

I started to break down the creamsickle engine this week. I pulled off the tin and FI to find the top of the cars and cylinders packed with oily dirt. What a mess. The thing smoked on deceleration and leaked oil. I figured I'd pull a head and I'll post some photos later. It all looks nasty oily. Where do I stop?

Any of you NW guys care to give me a hand?

[McMark]

Quick and dirty 'rebuild' would be to pull the heads have have them rebuilt, and then hone the cylinders and rering the pistons. Obviously this won't be any sort of power upgrade, but it will put some more life back in your engine.

[Dr Evil]

It also will not repair collapsed registers if you have them. Have the case registers checked to save yourself some headache.

[ldsgeek]

Can the registers be checked at home? If so what equipment and how to do this?

[sean_v8_914]

wouldnt colapsed reg cause a head leak?
inspect the head to cylinder sealing surface on teh head and cylinder. it should be evenly marked where the cylinder rests
when you remove the heads remember to plug the lifter bores with paper towel wads so they dont fall out. gotta keep em in teh right hole.
inspect each cam lobe w a flashlight. if they are not chewed up looking and the lifter face looks ok, slap it back together like McMark said

I have found many engines assembled without consideration to deck height so if your deck hieght is .085, there might be a few free ponies there to unleash

post some pics. the collective will figure it out

[Jake Raby]

Here is a classic example...
People who aren't decking cases are going to create themselves head leaks and issues.
This case was out .020 with sagging @ 3 and 9 O clock positions.

[VaccaRabite]

(IMG:style_emoticons/default/agree.gif)
I had to deck my case .010

Register collapse was the root cause of a failry large head leak.

Of course, you can't check for it without splitting the entire engine.

I would do a leakdown test on the engine and see if it is excessive. If you have a leaky cylinder, its easy to find out where it is leaky. Pressurize the cylinder with the same attachment that you use to pressurize a cylinder for leakdown testing. Leave it pressurizing and start squirting the cylinder with soapy water ( I used windex) and look for bubbles.

If bubbles are coming from your valves, you know you need a valve job, but your case deck is probably fine. If the bubbles are coming from between the head and the cylinder joint I would strip the motor completely and have the case checked and decked.

Zach

[mojorisen914]

Pulling the engine apart, Where do I stop?

When you get to the end.
(IMG:style_emoticons/default/poke.gif)
(IMG:style_emoticons/default/lol-2.gif)

[Dr Evil]

Pulling the engine apart, Where do I stop?

When you get to the end.
(IMG:style_emoticons/default/poke.gif)
(IMG:style_emoticons/default/lol-2.gif)

(IMG:style_emoticons/default/smile.gif) My first thought was "Depends on your wallet" (IMG:style_emoticons/default/poke.gif)

Zach has a good idea. However, IIRC, carbon buildup can mask some head leaks with this test.

[sean_v8_914]

why do you think they sag in the middle like that?

[VaccaRabite]

Pulling the engine apart, Where do I stop?

When you get to the end.
(IMG:style_emoticons/default/poke.gif)
(IMG:style_emoticons/default/lol-2.gif)

(IMG:style_emoticons/default/smile.gif) My first thought was "Depends on your wallet" (IMG:style_emoticons/default/poke.gif)

Zach has a good idea. However, IIRC, carbon buildup can mask some head leaks with this test.

If it leaks during a leakdown test, it will leak with the bubble test.

if the carbon deposits masks the leak at the leakdown test, you will never take the bubble test. At least this is the case if you do the bubble test at the same PSI you did leak down at. I did it at 100psi.

Zach

[PanelBilly]

colapsed registers, what's that?

Decking the case, I can figure that one out by the photos.

I've already pulled one of the heads off last night and it looks like there is blow-by between one of the cylinders and the head. I'll pull the other one off tonight and take pictures.

[McMark]

The big question is do you want to build it 100% right and spend whatever it takes? Or just get back on the road? Nobody is giving you wrong information here. But it's easy to recommend a whole list of checks and upgrades when it's someone else's money.

[VaccaRabite]

a register is the hole in the case that the cylinder slides into. When it collapses it is warping a little in the center due to a lack of support there and lots of heat cycles in the case.

2.0 914 engines and engine that were in buses are especially prone to this. The bus engine just because the engines ran hot pushing a big brick down the road. The 914 engine due to the case being a little thinner in that location then the other T4 engine iterations.

Zach

[r_towle]

Coming from you, a perfectionist, this is a joke question, right?

Take it all the way apart...
Start at the beginning, it will last another 100k.

Powdercoat the tin, fan, front fan housing, taco plate, sump cover, and all your tin screws.

RIch

Rich

[Jake Raby]

why do you think they sag in the middle like that?

Because the adjacent cylinder register takes material away from that area of the case.. and because of a lack of support behind that portion of the registers on the GA cases and newer..

W cases are the best in this regard.

As far as what to do with the engine.. Do it all the way, or not at all. A dollar saved now can equate to thousands spent later.

[sean_v8_914]

it is interesting to note that the GA case is the one people allways want because of the reputation of the 73 2.0. one could speculate it to be the most re-used/abused rode hard put away wet case.
all those early 1.7 cases got thown to the side and swapped out for rebuilt GA whores. so teh rebuild count on a per case would be lower. a 1.7 case with more of her virtue intact

[PanelBilly]

This head didn't look so good to me



The block is just packed with oily dirt

[PanelBilly]

This is what has me worried

[sean_v8_914]

thats a pig-rich oil burper.
those heads are damn near virgins. still have the casting boss around thr holes.
valves look a little deep
is that a crack on the left hole from plug to exh valve?