Inlet Manifold Problems

RoyLuke

Well-known member
Apr 18, 2007
239
8
The Machine Shop that rebuilt the heads missed three damaged "Heli-coils" that hold the inlet manifold on.
Today the Time-insert tool finally came (backordered) and installed the inserts
Whilst attempting to torque down the bolts to 38 ft/lbs the inserts pulled right thru the aluminium.

Can anyone tell me where to find the conversion kit for the Chevy engine?

This is the WORST engine I have ever worked on.
 

boxster

Well-known member
Jun 1, 2009
253
31
Fallbrook Ca.
The Machine Shop that rebuilt the heads missed three damaged "Heli-coils" that hold the inlet manifold on.
Today the Time-insert tool finally came (backordered) and installed the inserts
Whilst attempting to torque down the bolts to 38 ft/lbs the inserts pulled right thru the aluminium.

Can anyone tell me where to find the conversion kit for the Chevy engine?

This is the WORST engine I have ever worked on.
Info@rw-eng.com ask for Rick
 

WaltNYC

Well-known member
Mar 3, 2010
627
82
NYC
Maybe it was a typo, but I believe they should be 38Nm or 28 ft/lbs……
RAVE indicates the 4.0 Disco GEMS should be 28 ft/lbs and indicates 38 ft/lbs for the 4.6 Bosch. RAVE surely has errors. I torqued the intake on my 4.6 to 38 ft/lbs, FWIW. I have not had to do my 4.0 GEMS yet, but I have no idea what torque I would use.

While not common by any means, I have read of 4.0 intakes being torqued to 38 ft/lbs and having bolt threads fail.

I asked here and it appears to be a mystery. Not a single reply.

Here a D1 owner attempts to torque to 38 ft lbs and has all sorts of problems....
 

boxster

Well-known member
Jun 1, 2009
253
31
Fallbrook Ca.
RAVE indicates the 4.0 Disco GEMS should be 28 ft/lbs and indicates 38 ft/lbs for the 4.6 Bosch. RAVE surely has errors. I torqued the intake on my 4.6 to 38 ft/lbs, FWIW. I have not had to do my 4.0 GEMS yet, but I have no idea what torque I would use.

While not common by any means, I have read of 4.0 intakes being torqued to 38 ft/lbs and having bolt threads fail.

I asked here and it appears to be a mystery. Not a single reply.

Here a D1 owner attempts to torque to 38 ft lbs and has all sorts of problems....
3/8”-16 bolt 28 ft# 16 tpi 4.0
3/8“-24 bolt 38 ft# 24 tpi 4.6
WNYC you are correct, I said it early on the machine shop should have done there job and stood behind there work!