What is wrong with my motor? Figure this one out!! - Page 2

**Mr. Chevy** · #11 06-07-2009, 06:53 AM

Thanks Eric...

Rich

**Mr. Chevy** · #12 06-07-2009, 06:57 AM

What is the part number for the stock L34 pistons and where can you get them????????? I thought this was what I had.. I expressed to the builder that is what I wanted..

Rich

VintageMusclecar · #13 06-07-2009, 07:14 AM

L2383F .030

Note how short the domes are:

http://store.summitracing.com/partde...p;autoview=sku

**Donnie** · #14 06-07-2009, 07:38 AM

my bet is the top left corner on the radius of the dome and bottom right are just barley touching the head.

BUIZILLA · #15 06-07-2009, 05:06 PM

what does the pistons have to do with the 1-7 oiling idea?

is there any missing o-rings on the distributor body at the cam tunnel?

beater68427 · #16 06-07-2009, 08:23 PM

If there was a contact issue when turning the engine over it should have been detected, it would of had a very hard spot of just stopped. I would ask the builder about what plugs were used behind timing chain, and if there is a oiling hole used and if so what size. the cam bearings can be a problem if not correctly installed, I ran into a problem similar to this years ago and found I went to a straight 30 wt oil when breaking it in, I had 3 or so lifters not pumping up. I found the problem and so I went to my parts room grabbed another set of lifters and took them apart, I found they had been packed with cosmoline and I figured they were plugging things up, I drained the oil put some 10wt in it re primed it like crazy with the valve covers off untill I saw oil out of every push rod I then drained the oil, put some fresh straight 30wt in with a new filter and fired it up after about 40 seconds it was all fine. That is the only time I have ever experienced a problem like this, not sure it its your problem but a area to look into. Also what kind of oil pressure are you seeing? Good Luck!!

**YENKO DEUCE REGISTRY** · #17 06-08-2009, 08:20 PM

If the piston-to-head clearance is the issue, can you just install a thicker head gasket?

**Mr. Chevy** · #18 06-08-2009, 08:30 PM

The motor is coming back out tomm. and will be sent back to the builder all together. He said he wants to carefully take it apart and see what is going on... Hopefully if the piston/head clearance is the problem the heads can be slighlty modified to where it will work and I won't have to replace the pistons..

Maybe it's a combination of both lifter/oiling problems and piston to head clearance.. That would be my luck of course!! I tell ya if I didn't have bad luck I would have none at all!!!

Rich

**John Brown** · #19 06-08-2009, 09:04 PM

I have a friend that kept sending complete engines back to his builder too. The stories they came up with were unbelievable as to what went wrong each time. I would suggest you be there for the grand opening. When my friend finally took his own engine apart, the real story came out. The rings were sticking in the grooves and caused all kinds of blow-by. The piston manufacturer and the ring manufactured weren't getting the real story from the builder. When both manufacturers were contacted on a conference call, the problems were discussed and finally cured like they should have been two years earlier. I know that no one wants to believe their engine builder is incompetent, but the covering up and excuses go on all the time. It's in your best interest to see what's inside when he opens it up.

**BJCHEV396** · #20 06-09-2009, 03:13 AM

Hang in there Rich.Once your car is running right all of the problems will be forgotten.

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