Continental Field Systems

MSIV Map and Repair

This MSIV project consisted of both the inboard and outboard sets of MSIV’s for a total of 8 valves. Work on each valve varied from just mapping, skimming and honing, to a full guide rib repair. Although this project did not consist of a seat repair, it is fully within our realm expertise.

 
Job Summary:
 

Outboard MSIV’s

Alfa / Honed upper bore, mapped valve body, skim cut and lapped seat, took skim cut on seat bore, machine the last 4” of the 6 O’clock guide rib (rib is ramped)

Bravo / Honed upper bore, mapped valve body, machined seat bore to 23.052, skim cut and lapped seat, skim cut the last 4” of the 6 O’clock guide rib (rib is ramped)

Charlie / Honed upper bore, mapped valve body, skim cut and lapped seat

Delta / Honed upper bore, mapped valve body, skim cut and lapped seat.

Inboard MSIV’s

Alfa / Honed upper bore, mapped valve body, skim cut and lapped seat.

Bravo / Honed upper bore, mapped valve body, machined seat bore to 23.049, skim cut and lapped seat.

Charlie / Honed upper bore, mapped valve body, skim cut and lapped seat.

Delta / Honed upper bore, mapped valve body, skim cut and lapped seat.

2 O’clock guide rib repair. We welded over the existing guide rib overlay and machined back to OEM specs.

Note: Delta is rolled 22-degress

Bonnet Mod’s / Outboard

Charlie / Removed the threaded stem bushing. Removed (4) yoke rods & drilled one out. Drilled and tapped (8) 2”-8 holes. Machine top of bonnet, (minimum clean up). Machine 4” off bottom of bonnet. Drilled out 1.5-8 eye bolt.

Delta / Removed the threaded stem bushing. Drilled and tapped (8) 2”-8 holes. Machined top of bonnet, (minimum clean up). Machine 4” off bottom of bonnet.

Bonnet Mod’s / Inboard

Delta / Removed the threaded stem bushing. Screw out two cut off yoke rods and drilled out the third. Drilled and tapped (8) 2”-8 holes. Machined top of bonnet (minimum clean up). Machine 4” off bottom of bonnet.

Charlie / Removed the threaded stem bushing. Screw out two cut off yoke rods and drilled out the third. Drilled and tapped (8) 2”-8 holes. Machined top of bonnet (minimum clean up). Machine 4” off bottom of bonnet.

Spring Plate, Spring Seat & Spring Spacer Machining / Outboard & Inboard

We over bored the yoke rod holes in (8) spring plates. Over bored the yoke rod holes in (32) spring seats. Over bored the yoke rods holes in (32) spring spacers

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