# Service bulletin 99086

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 6089009
- Published by NHTSA: 2000\-01\-12
- Manufacturer's number: 99086
- Manufacturer's date: 1999\-12\-01
- NHTSA component: ENGINE AND ENGINE COOLING:ENGINE

## NHTSA's summary

SOME VEHICLES MAY EXHIBIT A CONDITION IN WHICH THE CYLINDER HEAD BOLTS MAY BECOME LOOSE AND CAUSE COOLANT LEAKS AND POSSIBLE ENGINE DAMAGE. \*TT

## The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

## Components

Engine

## Vehicles listed

- 1999 CADILLAC DEVILLE
- 1999 CADILLAC ELDORADO
- 1999 CADILLAC SEVILLE
- 1999 OLDSMOBILE AURORA

## Other bulletins for the same vehicles and component

- [130089009](/bulletins/10246631.md), 2023-12-11, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\). Expanded Availability for Remanufacture and Return \(R\&R\) Electronic Control Modules
- [3951](/bulletins/10020584.md), 2006-11-20, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE. KNOCKIG NOISES OR EXCESSIVE OIL CONSUMPTION. VEHICLES WITH LD8 OR L37 4.6L V8 ENGINES. \*KB
- [3612](/bulletins/10018567.md), 2006-01-06, Service bulletin: ENGINE AND ENGINE COOLING. ENGINE LIFTER TICK NOISE. \*TT
- [040605008](/bulletins/10012115.md), 2005-02-14, Service bulletin: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE. AVAILABILITY OF EXHAUST MUFFLER FOR SERVICE. \*TT
- [3035](/bulletins/10009634.md), 2004-10-14, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE. SERVICE ENGINE SOON \(SES\) LIGHT ON, SES LIGHT ON AND CHUGGLE OR SURGE. DIAGNOSTIC TROUBLE CODE P0741 \(TCC STUCK OFF\). \*TT
- [09132002](/bulletins/10009448.md), 2004-09-30, Service bulletin: ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN. THIS MESSAGE CONCERNS INSIDE AIR TEMPERATURE SENSOR NOISY. COMMENTS THAT A NOISE IN THE LEFT SIDE OF THE INSTRUMENT PANEL ON COLD STARTS. THIS NOISE MAY BE DESCRIBED AS A GRIND, GROWL, HUM, WHINE OR SQUEAL. A FAN NOISE MAY ALSO BE HEARD WHILE DRIVING. THIS CONDITION MAY BE CAUSED BY THE INSIDE AIR TEMPERATURE SENSOR. \*TT
- [02103](/bulletins/10007731.md), 2004-07-09, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE. 4T80E MH1 SERVICE ENGINE SOON \(SES\) LIGHT ON WITH DIAGNOSTIC TROUBLE CODE \(DTC\) P0741 \(TCC STUCK OFF\). \*TT
- [01792](/bulletins/10006332.md), 2004-04-28, Service bulletin: ENGINE AND ENGINE COOLING. 4.0L L47, 4.6L LD8 L37 ENGINE WATER PUMP COVER P/N 12571913\- THERMOSTAT LOOSE. ALSO INCLUDING MODEL 2003 CADILLAC ELDORADO. \*MR
- [01771](/bulletins/10006307.md), 2004-04-28, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE. 4.0L L47, 4.6L LD8, L37, LH2 ENGINE COOLANT OR OIL LEAK.\*MR
- [990601010C](/bulletins/10005597.md), 2004-03-05, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE. ENGINE COLD/KNOCK/TICK NOISE. \*TT

JSON: [/v1/bulletins/6089009](/v1/bulletins/6089009)

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