390 Problem

Reply Subscribe

Thread Tools

Search this Thread

Jan 19, 2013 | 10:10 PM

#16

1oldtimer

Thread Starter

Laughing Gas

Joined: Apr 2009

Posts: 751

Likes: 1

From: orange county, ca.

Quote:

Originally Posted by HOTWRENCH

Sometimes a loose valve guide will cause a ticking noise that sounds like a noisy lifter. If your experencing leakage past a exhaust valve it could be caused by a loose guide.

Have A Good Day ------- Hotwrench

Yup, did a leak down test and found #7 exhaust was leaking. I pulled the head took it to the machine shop. The exhaust guides were oval, but the intakes were ok. Pulled the other head took it in and all the guides are good. The oil passage from the block is ok, the shaft seals are in ok, the shaft is a little warn and so are the rockers (but not too bad)

. The only thing is the pushrods in the beginning were too long in all the motor, but it was ticking since the 1st start-up.

Feb 11, 2013 | 12:11 AM

#17

orich

Lead Driver

Joined: Aug 2003

Posts: 7,592

Likes: 10

From: **** hole San Jose ca.

I saw your first picture and noticed the block pin for the intake still in to line up on with the cork gasket on it. Every aftermarket intake I've seen is not drilled for the alignment pin. This will crack the intake when a guy tries to tighten the manifold down.. I've seen this over & over when shops install aftermarket intake on fe's. PULL that pin if your manifold is not drilled for it..Plus use the right gaskets from edelbrock. my 2cents orich

Feb 12, 2013 | 02:52 AM

#18

Redmanbob

Logistics Pro

Joined: Oct 2005

Posts: 3,785

Likes: 4

From: Mddl A MexCans

With a gap at cork walls, dont think the intake was shaved. All seem well while torquing the bolt in helicoil ?

Intake hitting head gasket tangs ?
sug:
1. remove hcoil, tap oversize, open intake hole
2. flip heads around and see how it reacts, if doing so check deck height for drift.
3. have bead run on intake crossover port, reinstall to check..

in OC as well, be happy to take a look.

Feb 12, 2013 | 02:23 PM

#19