aries
Enthusiast
So some of you know I purchased a SRT10 motor from Ligenfelter that they had on Ebay. The specs were as follows:
Dodge Viper aluminum V10 block - blueprinted
Moldex 4340 billet steel crankshaft - 4.250" stroke
Oliver 4340 billet steel connecting rods 6.250"
Lingenfelter billet steel main caps / ARP main studs
Mahle forged aluminum pistons 4.030" diameter
Total Seal file fit piston rings
Lingenfelter CNC ported Viper cylinder heads
2.02 Stainless steel one piece intake valves
1.60 Inconnel one piece exhaust valves
Competition Cams custom roller camshaft for turbo application
Competition Cams dual valve springs, titanium retainers, 10 degree valve retainer locks
Competition Cams HD .080" wall pushrods
T&D aluminum shaft mount roller rocker arms - 1.7 ratio
8.2: 1 compression
Machine Work
Crankshaft journals are align honed
Cylinders are bored on a Rottler F65 3 axis CNC
Cylinders are honed on a Rottler HP6 with torque plates
Block deck surfaces machined on a Rottle F65 3 axis CNC
Blocks are hand de-burred, bolt holes are checked & re-tapped
Lingenfelter CNC ported cylinder heads
Precision multi angle valve job
CC checking chamber size for correct compression
Surfacing to insure deck flatness
Set spring height, retainer to guide clearance & assembly
All internal parts are de-burred, hand washed and inspected Pistons, pins and connecting rods are pin fit to specification Crankshafts are computer balanced to within .5 grams or less, oil holes chamfered, bearing surfaces micro polished
Lingenfelter blueprint and assembly
Includes verification of LPE specifications of: cylinder bore diameter, cylinder wall taper, piston diameter, deck height of block, bearing clearances, crankshaft end play, piston to valve clearance, bolt torque specifications, lifter bore diameter, piston skirt taper, piston to wall clearance, piston ring end gap, rod side clearance, valve adjustment, degreeing the camshaft, correct oil pressure during priming.
So I have a gut feeling that I felt I should have the heads off to look and make sure all is well with this motor before installing it in my car. Howard from AR Fabrication calls me and says it's a really good thing that I di. Here's the email I get from AR Fabrication:
Joe,
As per your request we removed the engine from the car and removed the heads off. I have attached the pictures of the engine as of last night. We are glad that you decided to have the heads removed and the engine inspected before we performed the final installation and tuning.
Here is what we found:
Several cylinders have light to heavy particulate material at 6 and 7 O’clock resulting from the lack of or poor deburring of the spark plug holes prior to assembly of the engine.
We also noticed that when removing the ARP head studs the lack of any lubrication on the threads(but a small amount of red Loctite at the top of the threads) in the block resulting in difficult removal that can cause galling of the aluminum material in the block. Several of the stud holes were not thoroughly cleaned and ferrous and non-ferrous material particulate has been found in several holes. The tops of the head studs were lubricated with an assembly lube not recommended by ARP, the recommended lubrication from ARP is 30wt Oil or their supplied Moly assembly lube. Without using the proper lubrication the recommended torque spec could be out of range. UNLESS, LPE has analysis data of the lubrication used to support its usage, this was an incorrect procedure according to the ARP procedure.
We will continue to tear-down the rest of the motor today and call and email with all results. We will then do a final inspection(including re-measuring all clearances) and properly ULTRASONICALLY cleaning all parts before doing a complete re-assembly of the motor for installation.
Thank you,
Howard
So I talked to Tim Dyer at Lingenfelter and he basically tells me that everything was ok when it left his shop and I guess he thinks I or AR Fabrication must have pored metal shavings into the motor. Just goes to show you that you can't even trust the "reputable" shops. BTW, AR Fabrication sent me pics that I can't post here because I've used all my "space".
Dodge Viper aluminum V10 block - blueprinted
Moldex 4340 billet steel crankshaft - 4.250" stroke
Oliver 4340 billet steel connecting rods 6.250"
Lingenfelter billet steel main caps / ARP main studs
Mahle forged aluminum pistons 4.030" diameter
Total Seal file fit piston rings
Lingenfelter CNC ported Viper cylinder heads
2.02 Stainless steel one piece intake valves
1.60 Inconnel one piece exhaust valves
Competition Cams custom roller camshaft for turbo application
Competition Cams dual valve springs, titanium retainers, 10 degree valve retainer locks
Competition Cams HD .080" wall pushrods
T&D aluminum shaft mount roller rocker arms - 1.7 ratio
8.2: 1 compression
Machine Work
Crankshaft journals are align honed
Cylinders are bored on a Rottler F65 3 axis CNC
Cylinders are honed on a Rottler HP6 with torque plates
Block deck surfaces machined on a Rottle F65 3 axis CNC
Blocks are hand de-burred, bolt holes are checked & re-tapped
Lingenfelter CNC ported cylinder heads
Precision multi angle valve job
CC checking chamber size for correct compression
Surfacing to insure deck flatness
Set spring height, retainer to guide clearance & assembly
All internal parts are de-burred, hand washed and inspected Pistons, pins and connecting rods are pin fit to specification Crankshafts are computer balanced to within .5 grams or less, oil holes chamfered, bearing surfaces micro polished
Lingenfelter blueprint and assembly
Includes verification of LPE specifications of: cylinder bore diameter, cylinder wall taper, piston diameter, deck height of block, bearing clearances, crankshaft end play, piston to valve clearance, bolt torque specifications, lifter bore diameter, piston skirt taper, piston to wall clearance, piston ring end gap, rod side clearance, valve adjustment, degreeing the camshaft, correct oil pressure during priming.
So I have a gut feeling that I felt I should have the heads off to look and make sure all is well with this motor before installing it in my car. Howard from AR Fabrication calls me and says it's a really good thing that I di. Here's the email I get from AR Fabrication:
Joe,
As per your request we removed the engine from the car and removed the heads off. I have attached the pictures of the engine as of last night. We are glad that you decided to have the heads removed and the engine inspected before we performed the final installation and tuning.
Here is what we found:
Several cylinders have light to heavy particulate material at 6 and 7 O’clock resulting from the lack of or poor deburring of the spark plug holes prior to assembly of the engine.
We also noticed that when removing the ARP head studs the lack of any lubrication on the threads(but a small amount of red Loctite at the top of the threads) in the block resulting in difficult removal that can cause galling of the aluminum material in the block. Several of the stud holes were not thoroughly cleaned and ferrous and non-ferrous material particulate has been found in several holes. The tops of the head studs were lubricated with an assembly lube not recommended by ARP, the recommended lubrication from ARP is 30wt Oil or their supplied Moly assembly lube. Without using the proper lubrication the recommended torque spec could be out of range. UNLESS, LPE has analysis data of the lubrication used to support its usage, this was an incorrect procedure according to the ARP procedure.
We will continue to tear-down the rest of the motor today and call and email with all results. We will then do a final inspection(including re-measuring all clearances) and properly ULTRASONICALLY cleaning all parts before doing a complete re-assembly of the motor for installation.
Thank you,
Howard
So I talked to Tim Dyer at Lingenfelter and he basically tells me that everything was ok when it left his shop and I guess he thinks I or AR Fabrication must have pored metal shavings into the motor. Just goes to show you that you can't even trust the "reputable" shops. BTW, AR Fabrication sent me pics that I can't post here because I've used all my "space".