(Not*) Mediocre 242

[t8fanning]

I don't have any experience either. Just makes sense that if it was working fine, no need to replace them. Plus it's extra money and time.

 

[Stiggy Pop]

I don't have any experience either. Just makes sense that if it was working fine, no need to replace them. Plus it's extra money and time.

No reason to throw away good bearings with nominal time on them.

Good to know the rings were easy to get. I'm interested to see what the MS reports back.

 

[Tfrasca]

Oh this is still a new-ish build. I forgot about that. Carry on!

 

[t8fanning]

No reason to throw away good bearings with nominal time on them.

Good to know the rings were easy to get. I'm interested to see what the MS reports back.

It was way easier and faster than I thought. Just gave them the custom piston part number from the above sheets and they looked it up and sent them out in a day or so.

 

[t8fanning]

Oh this is still a new-ish build. I forgot about that. Carry on!

Yeah. The engine has only had about a year of driving on it.

 

[t8fanning]

Took my block and pistons to the machine shop today and got some good news. My piston to cylinder clearance is 0.0045" on all four. Should be great for the power I'm trying to make. They're just doing a hone to help my rings seal, should be done tomorrow. I'll then pop everything back in with new rings and hopefully be fine.

I do think I need some more ventilation though. I'll probably get a Yoshifab mechanical fuel pump vent.

 

[cosbySweater]

What size lines are you using for your catch can setup?

 

[t8fanning]

-10 from the block and oil cap. -8 return. -10 to the intake pre turbo.

 

[Tfrasca]

I've always wondered how adding more vents is going to help if the catch can is limited by the one -10 to the pre-turbo pipe.

 

[t8fanning]

I hope the additional volume added by the hose helps.

I don't think the pre-turbo hose diameter is the problem. It's only there to create a low pressure zone in the catch can. I think the catch can size and baffling are the real limiting factors. If it was larger and/or had better baffling, it probably would better separate the oil vapors.

 

[2JZFC]

Awesome project!

I followed your example and did the Walbro 450 swap as you have pictured, but I cannot for the life of me get the assembly back in. Is there some magic trick or special procedure you can reveal? After knocking off the sock into the tank the 3rd time, I quit

 

[cosbySweater]

Awesome project!

I followed your example and did the Walbro 450 swap as you have pictured, but I cannot for the life of me get the assembly back in. Is there some magic trick or special procedure you can reveal? After knocking off the sock into the tank the 3rd time, I quit

How did you angle the sock?

 

[2JZFC]

How did you angle the sock?

Not quite sure what you're asking. The sock can only go on the pump one way and is wider than the hole. I'm putting the sock in first, but the wider lower body of the Walbro and the float together are too wide for the hole. The sock pops off when trying to take it back out maybe because I am not folding it to get it out like I do putting it in.

 

[t8fanning]

You have to make sure the float is facing in toward the pump to minimize the cross section. Then kinda just angle the sock in, then kinda pop the float past the hole and hope it doesn't fall out.

 

[t8fanning]

So I got the engine block back from the machine shop with a fresh hone. Some paint came off while they were cleaning it. The shop that painted it apparently used VHT "safety red", which isn't listed as a color. I'll probably just touch up with VHT bright red.

 

[2JZFC]

......then kinda pop the float past the hole and hope it doesn't fall out.

It didn't fall out, it cracked like an eggshell. Crap!

 

[t8fanning]

Finally did some work on the engine today and assembled the rotating assembly. I'm still waiting on some parts from IPD, so it's probably not going to run anytime soon.

But I did find out what my blowby problem was. My ring end gap was huge. Something like 0.030". I set the new gaps to 0.022" and was sure to clock the rings like Wiseco says to. Everything seems nice and tight.

Here's an old ring:

 

[Gnomestur]

Man that sucks about rings! I remember during the build if they recommended any different rings too. Hope you hit that whp goal!

 

[t8fanning]

Man that sucks about rings! I remember during the build if they recommended any different rings too. Hope you hit that whp goal!

Yeah it happens. It was kinda nice because it forced me to fully tear it down and rebuild, which I have never done before. It was nice to learn how easy it is to assemble an engine. I also had time to do a couple more things like add some turbo bracing and another oil pan bung.

 

[t8fanning]

I hate this.