Engine System-General Information: Component Locations Mercury Monterey VIII

Special Tool(s)

SPECIAL TOOL SPECIFICATIONS Commercially Available Leakdown Tester - Quick Disconnect Compression Tester 134-R0212 or equivalent Dial Indicator Gauge Adapter 303-007 (TOOL-6565-AB) or equivalent Dial Indicator Gauge with Holding Fixture 100-002 (TOOL-4201-C) or equivalent Engine Cylinder Leak Detection/Air Pressurization Kit 014-00708 or equivalent Oil Pressure Gauge 303-088 (T73L-6600-A) UV Leak Detector Kit 164-R0756 or equivalent Vacuum/Pressure Tester 164-R0253 or equivalent

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SPECIAL TOOL SPECIFICATIONS Dial Indicator Gauge with Holding Fixture 100-002 (TOOL-4201-C) or equivalent

Scheme 252

1. Remove the valve tappets. Refer to «ENGINE - 3.9L AND 4.2L»(ref-234492) article for the procedure.
2. Use a Dial Indicator Gauge with Holding Fixture to measure camshaft end play.
3. Position the camshaft to the rear of the cylinder block.
4. Zero the indicator.
5. Move the camshaft to the front of the cylinder block. Note and record the camshaft end play. If the camshaft end play exceeds specifications, install a new camshaft thrust plate. Refer to «ENGINE - 3.9L AND 4.2L»(ref-234492) article for the procedure.

Scheme 253

1. Inspect camshaft lobes for pitting or damage in the contact area. Minor pitting is acceptable outside the contact area. If excessive pitting or damage is present, install new components as necessary. Refer to «ENGINE - 3.9L AND 4.2L»(ref-234492) article for the procedure.

SPECIAL TOOL SPECIFICATIONS Dial Indicator Gauge with Holding Fixture 100-002 (TOOL-4201-C) or equivalent

Scheme 254

1. Use a Dial Indicator Gauge with Holding Fixture to measure camshaft intake/exhaust lobe lift. Rotate the camshaft and subtract the lowest indicator reading from the highest indicator reading to figure the camshaft lobe lift. Refer to «ENGINE - 3.9L AND 4.2L»(ref-234492) article for the procedure.

SPECIAL TOOL SPECIFICATIONS Dial Indicator Gauge with Holding Fixture 100-002 (TOOL-4201-C) or equivalent

SPECIAL TOOL SPECIFICATIONS Dial Indicator Gauge with Holding Fixture 100-002 (TOOL-4201-C) or equivalent

Scheme 255

1. Use a Dial Indicator Gauge with Holding Fixture to measure crankshaft end play.
2. Position the crankshaft to the rear of the cylinder block.
3. Zero the indicator.
4. Move the crankshaft to the front of the cylinder block. Note and record the crankshaft end play. If crankshaft end play exceeds specifications, install a new crankshaft thrust washer or crankshaft thrust main bearing. Refer to «ENGINE - 3.9L AND 4.2L»(ref-234492) article for the procedure.

SPECIAL TOOL SPECIFICATIONS Dial Indicator Gauge with Holding Fixture 100-002 (TOOL-4201-C) or equivalent

SPECIAL TOOL SPECIFICATIONS Scraper, Piston Ring Groove 303-D033 (D81L-6002-D) or equivalent

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1. Clean and inspect the (1) ring lands, (2) skirts, (3) pin bosses and the (4) tops of the pistons. If wear marks, scores or glazing is found on the piston skirt, check for a bent or twisted connecting rod.
2. Use the Piston Ring Groove Scraper to clean the piston ring grooves. Make sure the oil ring holes are clean.

SPECIAL TOOL SPECIFICATIONS Dial Indicator Gauge with Holding Fixture 100-002 (TOOL-4201-C) or equivalent Clearance Gauge, Valve Guide 303-004 (TOOL-6505-E) or equivalent

Note. Valve stem diameter must be within specifications before checking valve stem to valve guide clearance.

SPECIAL TOOL SPECIFICATIONS Pressure Gauge, Valve/Clutch Spring 303-006 (TOOL-6513-DD) or equivalent

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SPECIAL TOOL SPECIFICATIONS Feeler Gauge Set 303-D027 (D81L-4201-A) or equivalent Straight Edge 303-D039 (D83L-4201-a) or equivalent

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SPECIAL TOOL SPECIFICATIONS Slide Hammer 100-001 (T50T-100-A)

SPECIAL TOOL SPECIFICATIONS Straight Edge 303-D039 (D83L-4201-A) or equivalent