GT55 Crankcase Replacement Cover OS29707000 by O.S. Engine  [OS29707000]

O.S. ENGINES COVER PLATE GT55
Price:
AUD$27.34
Brand:
O.S. Engine
Model:
OS29707000
GTIN:
4531028145917
Condition:
Brand New
Write a review
alt="O.S. ENGINES COVER PLATE GT55" title="O.S. ENGINES COVER PLATE GT55"
alt="O.S. ENGINES COVER PLATE GT55" title="O.S. ENGINES COVER PLATE GT55"

Quick description of the GT55 cover

The O.S. Engine OS29707000 cover plate is intended for use where the GT55 crankcase cover needs replacement to restore sealing integrity and to protect the engine internals from ingress or damage.

Installers should ensure all mating surfaces are clean, verify dowel and bolt alignment, and fasten the plate with original or matching hardware tightened to the manufacturer's recommended torque. Using thread-lock and a torque driver reduces the risk of warping the cover or the crankcase.

Correct installation maintains crankcase pressure and sealing rather than changing engine output; this helps sustain consistent compression and prevents leaks that can disturb ignition timing and carburetor performance. Replace worn seals during the job.

Specifications

  • Item: O.S. ENGINES COVER PLATE GT55
  • Material: Not specified by manufacturer
  • Model Number: OS29707000
  • Compatibility: Refer to manufacturer's parts index for compatible GT55 engine variants

Intended as a direct-fit replacement for GT55-series crankcases fitting the OS29707000 part number; always confirm part number and fitment before purchase.

What pre-fit checks should I do on the crankcase?

Inspect the mating faces for corrosion, nicks or old gasket material. Clean thoroughly and ensure dowel pins are present and undamaged before fitting the replacement plate.

How tight should the fasteners be?

Tighten to the manufacturer's specified torque values. Over-torquing can warp the plate; under-torquing risks leaks. Use a calibrated torque driver for accuracy.

Will this part change engine performance?

No. The cover maintains crankcase sealing and mechanical protection. It does not alter internal porting or displacement, so it should not affect power output when correctly fitted.

Any final checks before running the engine?

Verify bolt torque, inspect for visible leaks, and perform a static compression or leak-down test where possible. Conduct a short, cautious run to confirm stable idling and no fuel or oil seepage.

Copyright © 2008-2026 rcjaz.com.au All rights reserved