4.6 dohc rebuild

[Phoenix0783]

The motor in my '97 Cobra is getting a little tired so when I found a complete engine for $350 with "a rod knock" I bought it to rebuild

Already removed intake, valve covers, harnesses, and accessories

Making progress

Not bad

Still not bad

Good cross hatch still

Heads were a little oily but OK.

About 5 hours to get this far.

Fingers crossed

Doh! #2 rod bearing

#1 main bearing

#5 main bearing

Other half of #5 main bearing

#2 rod journal

 

[96blak54]

That cranks toast! Good thing you knew! What did the engine come from and what year?

 

[Phoenix0783]

That cranks toast! Good thing you knew! What did the engine come from and what year?

'97 Cobra. I'm worried about the main bearing saddles in the block now, but I think they're fine.

 

[D3VST8R96GT]

Line hone for shits and giggles or just gonna run it?

 

[MustangChris]

hm. looks fine to me. Just put it back together and use synthetic next time.





[/sarcasm]

 

[KillNThrill24]

I <3 4v
I hate tearing apart 4v. Takes all day. Sounds like you've found your problem tho. Nice work tearing down

 

[D3VST8R96GT]

how did the cam jounrals look?

 

[Phoenix0783]

how did the cam jounrals look?

Haven't looked at them yet. Probably should soon though.

 

[D3VST8R96GT]

This just goes to show you can never have too much oil in a 4v...... the pumps are the greatest but they suck the sup dry pretty often.... the only cobra motor I disassembled that had great rod and main bearings and journals threw a rod and did some minor damage to a sleeve

 

[96blak54]

Ive literally had arguments with known modular forum guys about how easy the pump can suck the pan dry at high rpms. Im glad to see others know this as well. The pan is efficient enough but between gravity return and windage catching the return the pump will dry suck.

 

[D3VST8R96GT]

I want to look into porting the drain passages a little but I'm lazy a 7qt oil pan is a cheap band aid

 

[96blak54]

And about the only too

 

[D3VST8R96GT]

Shm and MHS have both discussed options... MHS web page about it is confusing as hell

 

[Phoenix0783]

MHS?

 

[96blak54]

Masterbate Hand Soap?

 

[96blak54]

SeanHylandMotorsports and ModularHeadSports

 

[D3VST8R96GT]

So we are kinda taking over your thread .... kinda seems pretty common lately.... I think [MENTION=14727]96blak54[/MENTION] is following me.... or I'm following him

 

[Phoenix0783]

So we are kinda taking over your thread .... kinda seems pretty common lately.... I think 96blak54 is following me.... or I'm following him

Haha. No worries. I didn't know the stuff about the oil pump sucking the pan dry, so that's good to know.

 

[96blak54]

Lets assume the heads are fine. The block rebuild is going to cost more than what another junkyard score will. Let this block sit and start looking for another shortblock, but be sure to hear the run, rev it up, etc..

 

[D3VST8R96GT]

Of you can inspect the oil pan look for shavings